OpenVDB 12.1.0

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AST.h
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1// Copyright Contributors to the OpenVDB Project
2// SPDX-License-Identifier: Apache-2.0
3
4/// @file ast/AST.h
5///
6/// @authors Nick Avramoussis, Richard Jones
7///
8/// @brief Provides the definition for every abstract and concrete derived
9/// class which represent a particular abstract syntax tree (AST) node
10/// type.
11///
12/// AST nodes represents a particular branch of a complete AST. Concrete
13/// nodes can be thought of as leaf node types which hold semantic
14/// information of a partial or complete statement or expression. A
15/// string of AX can be fully represented by building the correct
16/// AST structure. The AX grammar defined in axparser.y represents the
17/// valid mapping of a tokenized string to AST nodes.
18///
19/// AST node classes can either represent a "leaf-level" semantic
20/// component of a given AX AST, or an abstract base type. The latter are
21/// used by the parser and leaf-level AST nodes for storage of compatible
22/// child nodes, and provide grouping of various nodes which share common
23/// semantics. The main two types of abstract AST nodes are statements
24/// and expressions.
25///
26
27#ifndef OPENVDB_AX_AST_HAS_BEEN_INCLUDED
28#define OPENVDB_AX_AST_HAS_BEEN_INCLUDED
29
30#include "Tokens.h"
31
32#include <openvdb/version.h>
33#include <openvdb/util/Assert.h>
34
35#include <memory>
36#include <utility>
37#include <vector>
38
39 namespace openvdb {
40 OPENVDB_USE_VERSION_NAMESPACE
41 namespace OPENVDB_VERSION_NAME {
42
43 namespace ax {
44 namespace ast {
45
46/// @brief Forward declaration of the base Abstract Syntax Tree type.
47/// @note Not to be confused with ast::Node types, which are the base abstract
48/// type for all AST nodes. Tree nodes are the highest possible concrete
49/// node type (in terms of hierarchy) which represent a full AX file.
50/// They are always returned from the parser.
51 struct Tree;
52
53////////////////////////////////////////////////////////////////////////
54////////////////////////////////////////////////////////////////////////
55
56/// @details A reference list of all abstract and concrete AST nodes in
57/// hierarchical order (non-linear)
58/// Abstract nodes:
59/// - Node
60/// - Statement
61/// - Expression
62/// - Variable
63/// - ValueBase
64///
65/// Concrete nodes:
66/// - Tree
67/// - StatementList
68/// - Block
69/// - Loop
70/// - Keyword
71/// - ConditionalStatement
72/// - CommaOperator
73/// - BinaryOperator
74/// - TernaryOperator
75/// - AssignExpression
76/// - Crement
77/// - UnaryOperator
78/// - Cast
79/// - FunctionCall
80/// - ArrayUnpack
81/// - ArrayPack
82/// - Attribute
83/// - ExternalVariable
84/// - DeclareLocal
85/// - Local
86/// - Value<double/float/int32_t/int16_t/int64_t/bool>
87/// - Value<std::string>
88
89////////////////////////////////////////////////////////////////////////
90////////////////////////////////////////////////////////////////////////
91
92/// @brief The base abstract node which determines the interface and required
93/// methods for all derived concrete nodes which comprise a valid AST.
94/// @note All AST nodes share a few common characteristics. All constructors
95/// typically take pointers to the abstract (pure-virtual) node types
96/// and assume ownership of this data on successful construction. Deep
97/// copy methods propagate down through all children of a given AST node
98/// but have the unique behavior of ensuring parent data is updated to
99/// the newly created parent nodes. Due to this behavior and the fact
100/// that most nodes store unique pointers to other nodes, we've omitted
101/// comparison and equality operators.
102 struct Node
103{
104 using Ptr = std::shared_ptr<Node>;
105 using UniquePtr = std::unique_ptr<Node>;
106
107 /// @brief An enumerated list of node types for all concrete node types.
108 /// These can be used for faster evaluation of a given concrete node
109 /// using the virtual function table via Node::nodetype() rather
110 /// than performing a dynamic_cast/calling Node::isType.
111 /// @note This is sometimes referred to as "manual RTTI". We use this
112 /// technique combine with single dispatch due to opting for CRTP on
113 /// the main visitor and no templated virtual method support in C++.
114 /// i.e. no way to double dispatch: visit<template T>(Visitor<T>*)
115 /// @note Abstract (pure-virtual) nodes are not listed here. Node::isType
116 /// should be used to determine if a node is of a given abstract
117 /// type.
118 enum NodeType {
119 TreeNode,
120 StatementListNode,
121 BlockNode,
122 ConditionalStatementNode,
123 CommaOperatorNode,
124 LoopNode,
125 KeywordNode,
126 AssignExpressionNode,
127 CrementNode,
128 UnaryOperatorNode,
129 BinaryOperatorNode,
130 TernaryOperatorNode,
131 CastNode,
132 AttributeNode,
133 FunctionCallNode,
134 ExternalVariableNode,
135 DeclareLocalNode,
136 ArrayPackNode,
137 ArrayUnpackNode,
138 LocalNode,
139 ValueBoolNode,
140 ValueInt16Node,
141 ValueInt32Node,
142 ValueInt64Node,
143 ValueFloatNode,
144 ValueDoubleNode,
145 ValueStrNode
146 };
147
148 Node() = default;
149 virtual ~Node() = default;
150
151 /// @brief The deep copy method for a Node
152 /// @return A deep copy of the current node and all its children
153 virtual Node* copy() const = 0;
154
155 /// @name Name/Type
156 /// @{
157
158 /// @brief Virtual method for accessing node type information
159 /// @note This method should be used when querying a concrete nodes type.
160 /// @return Returns the enumerated node type from the NodeType list
161 virtual NodeType nodetype() const = 0;
162
163 /// @brief Virtual method for accessing node name information
164 /// @return Returns the node class name
165 virtual const char* nodename() const = 0;
166
167 /// @brief Virtual method for accessing node name information
168 /// @return Returns the short node class name
169 virtual const char* subname() const = 0;
170
171 /// @brief Virtual method for accessing a node's base class. Note that if
172 /// this is called explicitly on an instance of ast::Node (the top
173 /// most base class) a nullptr is returned. This is primarily used
174 /// by the Visitor to support hierarchical visits.
175 /// @return Returns the current node as its base class type.
176 virtual const Node* basetype() const { return nullptr; }
177
178 /// @brief Query whether or not this node is of a specific (derived) type.
179 /// This method should be used to check if a node is of a particular
180 /// abstract type. When checking concrete types, it's generally
181 /// more efficient to check the return value of Node::nodetype()
182 /// @tparam NodeT The node type to query against.
183 /// @return True if this node is of the given type, false otherwise.
184 template <typename NodeT>
185 inline bool isType() const {
186 return dynamic_cast<const NodeT*>(this);
187 }
188
189 /// @}
190
191 /// @name Child Queries
192 /// @{
193
194 /// @brief Virtual method for accessing child information. Returns the
195 /// number of children a given AST node owns.
196 /// @return The number of children this node owns.
197 virtual size_t children() const = 0;
198
199 /// @brief Virtual method for accessing child information. Returns a const
200 /// pointer to a child node at the given index. If the index is out
201 /// of range, a nullptr is returned.
202 /// @note This may still return a nullptr even if the given index is valid
203 /// if the child node has not been created.
204 /// @param index The child index to query
205 /// @return A Pointer to the child node, or a nullptr if none exists.
206 virtual const Node* child(const size_t index) const = 0;
207
208 /// @brief Returns the child index of this node in relation to its parent,
209 /// or -1 if no valid index is found (usually representing the top
210 /// most node (i.e. Tree)
211 /// @return The child index of this node
212 inline int64_t childidx() const
213 {
214 const Node* p = this->parent();
215 if (!p) return -1;
216 size_t i = 0;
217 const size_t count = p->children();
218 for (; i < count; ++i) {
219 if (p->child(i) == this) break;
220 }
221 if (i == count) return -1;
222 return static_cast<int64_t>(i);
223 }
224
225 /// @}
226
227 /// @name Replacement
228 /// @{
229
230 /// @brief In place replacement. Attempts to replace this node at its
231 /// specific location within its Abstract Syntax Tree. On a
232 /// successful replacement, this node is destroyed, the provided
233 /// node is inserted in its place and ownership is transferred to the
234 /// parent node. No further calls to this node can be made on
235 /// successful replacements.
236 /// @note A replacement will fail if this node is the top most node within
237 /// an AST hierarchy or if the provided node type is not a
238 /// compatible type for the required abstract storage. For example,
239 /// if this node is an Attribute being held on a BinaryOperator,
240 /// only concrete nodes derived from an Expression can be used as a
241 /// replacement.
242 /// @note This method will dynamic_cast the provided node to check to see
243 /// if it's a compatible type.
244 /// @param node The node to insert on a successful replacement.
245 /// @return True if the replacement was successful, resulting in destruction
246 /// of this class and ownership transferal of the provided node.
247 /// False otherwise, where this and the provided node are unchanged.
248 inline bool replace(Node* node)
249 {
250 const int64_t idx = this->childidx();
251 if (idx == -1) return false; // avoid second vcall
252 return this->parent()->replacechild(idx, node);
253 }
254
255 /// @brief Virtual method that attempted to replace a child at a given
256 /// index with a provided node type.
257 /// @note See Node::replace for a more detailed description
258 /// @param index The child index where a replacement should be attempted
259 /// @param node The node to insert on a successful replacement.
260 /// @return True if the replacement was successful, false otherwise
261 inline virtual bool replacechild(const size_t index, Node* node);
262
263 /// @}
264
265 /// @name Parent
266 /// @{
267
268 /// @brief Access a const pointer to this nodes parent
269 /// @note Can be a nullptr if this is the top most node in an AST (usually
270 /// a Tree)
271 /// @return A const pointer to this node's parent node
272 inline const Node* parent() const { return mParent; }
273
274 /// @brief Set this node's parent. This is used during construction of an
275 /// AST and should not be used. @todo Make this private.
276 /// @param parent The parent to set
277 inline void setParent(Node* parent) {
278#ifdef OPENVDB_ENABLE_ASSERTS
279 [[maybe_unused]] bool hasChild = false;
280 for (size_t i = 0; i < parent->children(); ++i)
281 hasChild |= parent->child(i) == this;
282 OPENVDB_ASSERT(hasChild);
283#endif
284 mParent = parent;
285 }
286
287 private:
288 /// @brief Access a non const pointer to this nodes parent. Used by
289 /// replacement methods.
290 /// @note Can be a nullptr if this is the top most node in an AST (usually
291 /// a Tree)
292 /// @return A non-const pointer to this nodes parent node
293 inline Node* parent() { return mParent; }
294
295 /// @}
296
297 Node* mParent = nullptr;
298};
299
300 inline bool Node::replacechild(const size_t, Node*) { return false; }
301
302
303////////////////////////////////////////////////////////////////////////
304////////////////////////////////////////////////////////////////////////
305
306/// Abstract (pure-virtual) AST nodes
307
308/// @brief Statements are anything that can make up a line, i.e. everything
309/// in between semicolons. Likewise to their base ast::Node class,
310/// currently every concrete AST node is either directly or indirectly
311/// a derived statement type. They hold no class data.
312 struct Statement : public Node
313{
314 using UniquePtr = std::unique_ptr<Statement>;
315 ~Statement() override = default;
316 virtual Statement* copy() const override = 0;
317 const Node* basetype() const override { return this; }
318};
319
320/// @brief Expressions are comprised of full or potentially partial parts of a
321/// full statement that may not necessary make up an entire valid
322/// statement on their own. For example, while a Binary Operator such as
323/// "3 + 5;"" is a valid statement on its own, the full statement
324/// "3 + 5 + 6;" must be broken down into two expressions which together
325/// form the statement as well as determining precedence.
326 struct Expression : public Statement
327{
328 using UniquePtr = std::unique_ptr<Expression>;
329 ~Expression() override = default;
330 virtual Expression* copy() const override = 0;
331 const Statement* basetype() const override { return this; }
332};
333
334/// @brief Variables are a base type for Locals, Attributes and
335/// ExternalVariables. Unlike other abstract types, they also consolidate
336/// data for the derived types.
337 struct Variable : public Expression
338{
339 using UniquePtr = std::unique_ptr<Variable>;
340
341 Variable(const std::string& name)
342 : Expression(), mName(name) {}
343 Variable(const Variable& other)
344 : Expression(), mName(other.mName) {}
345 ~Variable() override = default;
346
347 virtual Variable* copy() const override = 0;
348 const Expression* basetype() const override { return this; }
349 //
350 size_t children() const override { return 0; }
351 const Node* child(const size_t) const override { return nullptr; }
352 //
353 inline const std::string& name() const { return mName; }
354
355 private:
356 const std::string mName;
357};
358
359/// @brief ValueBases are a base class for anything that holds a value (literal).
360/// Derived classes store the actual typed values
361 struct ValueBase : public Expression
362{
363 using UniquePtr = std::unique_ptr<ValueBase>;
364 ~ValueBase() override = default;
365 virtual Expression* copy() const override = 0;
366 const Expression* basetype() const override { return this; }
367 //
368 size_t children() const override { return 0; }
369 const Node* child(const size_t) const override { return nullptr; }
370};
371
372
373////////////////////////////////////////////////////////////////////////
374////////////////////////////////////////////////////////////////////////
375
376/// Concrete AST nodes
377
378/// @brief A StatementList is derived from a Statement and comprises of
379/// combinations of multiple statements. This could represent either
380/// a list of statements of different types but in practice will likely
381/// represent a ',' separated list of the same type i.e.
382/// 'int i = 1, j = 1;'.
383/// @note Statements held by the list are guaranteed to be valid (non null).
384/// nullptrs added to the list are implicitly dropped.
385/// @todo Consider combination with Block
386 struct StatementList : public Statement
387{
388 using UniquePtr = std::unique_ptr<StatementList>;
389
390 /// @brief Construct a new StatementList with an empty list
391 StatementList() : mList() {}
392 /// @brief Construct a new StatementList with a single statement,
393 /// transferring ownership of the statement to the statement list
394 /// and updating parent data on the statement. If the statement is a
395 /// nullptr, it is ignored.
396 /// @param statement The statement to construct from
397 StatementList(Statement* statement)
398 : mList() {
399 this->addStatement(statement);
400 }
401 /// @brief Construct a new StatementList from a vector of statements,
402 /// transferring ownership of all valid statements to the statement
403 /// list and updating parent data on the statement. Only valid (non
404 /// null) statements are added to the statement list.
405 /// @param statements The vector of statements to construct from
406 StatementList(const std::vector<Statement*>& statements)
407 : mList() {
408 for (Statement* statement : statements) {
409 this->addStatement(statement);
410 }
411 }
412 /// @brief Deep copy constructor for a StatementList, performing a deep
413 /// copy on every held statement, ensuring parent information is
414 /// updated.
415 /// @param other A const reference to another statement list to deep copy
416 StatementList(const StatementList& other) : mList() {
417 for (const Statement::UniquePtr& stmnt : other.mList) {
418 this->addStatement(stmnt->copy());
419 }
420 }
421 ~StatementList() override = default;
422
423 /// @copybrief Node::copy()
424 StatementList* copy() const override { return new StatementList(*this); }
425 /// @copybrief Node::nodetype()
426 NodeType nodetype() const override { return Node::StatementListNode; }
427 /// @copybrief Node::nodename()
428 const char* nodename() const override { return "statement list"; }
429 /// @copybrief Node::subname()
430 const char* subname() const override { return "stml"; }
431 /// @copybrief Node::basetype()
432 const Statement* basetype() const override { return this; }
433
434 /// @copybrief Node::children()
435 size_t children() const override final { return this->size(); }
436 /// @copybrief Node::child()
437 const Statement* child(const size_t i) const override final {
438 if (i >= mList.size()) return nullptr;
439 return mList[i].get();
440 }
441 /// @copybrief Node::replacechild()
442 inline bool replacechild(const size_t i, Node* node) override final {
443 if (mList.size() <= i) return false;
444 Expression* expr = dynamic_cast<Expression*>(node);
445 if (!expr) return false;
446 mList[i].reset(expr);
447 mList[i]->setParent(this);
448 return true;
449 }
450
451 /// @brief Alias for StatementList::children
452 inline size_t size() const { return mList.size(); }
453 /// @brief Adds a statement to this statement list, transferring ownership to the
454 /// statement list and updating parent data on the statement. If the
455 /// statement is a nullptr, it is ignored.
456 inline void addStatement(Statement* stmnt) {
457 if (stmnt) {
458 mList.emplace_back(stmnt);
459 stmnt->setParent(this);
460 }
461 }
462 private:
463 std::vector<Statement::UniquePtr> mList;
464};
465
466/// @brief A Block node represents a scoped list of statements. It may comprise
467/// of 0 or more statements, and specifically indicates that a new scope
468/// is activated, typically represented by curly braces. Note that a
469/// block does not alway have to be encapsulated by curly braces, but
470/// always represents a new scope.
471/// @note Statements held by the block are guaranteed to be valid (non null).
472/// nullptrs added to the block are implicitly dropped.
473/// @note While closely linked, it's important to differentiate between this
474/// class and an llvm::BasicBlock.
475/// @todo Consider combination with StatementList
476 struct Block : public Statement
477{
478 using UniquePtr = std::unique_ptr<Block>;
479
480 /// @brief Construct a new Block with an empty list
481 Block() : mList() {}
482 /// @brief Construct a new Block with a single statement, transferring
483 /// ownership of the statement to the block and updating parent
484 /// data on the statement. If the statement is a nullptr, it is
485 /// ignored.
486 /// @param statement The statement to construct from
487 Block(Statement* statement)
488 : mList() {
489 this->addStatement(statement);
490 }
491 /// @brief Construct a new Block from a vector of statements, transferring
492 /// ownership of all valid statements to the block and updating
493 /// parent data on the statement. Only valid (non null) statements
494 /// are added to the block.
495 /// @param statements The vector of statements to construct from
496 Block(const std::vector<Statement*>& statements)
497 : mList() {
498 for (Statement* statement : statements) {
499 this->addStatement(statement);
500 }
501 }
502 /// @brief Deep copy constructor for a Block, performing a deep copy on
503 /// every held statement, ensuring parent information is updated.
504 /// @param other A const reference to another block to deep copy
505 Block(const Block& other) : mList() {
506 for (const Statement::UniquePtr& stmnt : other.mList) {
507 this->addStatement(stmnt->copy());
508 }
509 }
510 ~Block() override = default;
511
512 /// @copybrief Node::copy()
513 Block* copy() const override final { return new Block(*this); }
514 /// @copybrief Node::nodetype()
515 NodeType nodetype() const override { return Node::BlockNode; }
516 /// @copybrief Node::nodename()
517 const char* nodename() const override { return "scoped block"; }
518 /// @copybrief Node::subname()
519 const char* subname() const override { return "blk"; }
520 /// @copybrief Node::basetype()
521 const Statement* basetype() const override { return this; }
522
523 /// @copybrief Node::children()
524 size_t children() const override final { return this->size(); }
525 /// @copybrief Node::child()
526 const Statement* child(const size_t i) const override final {
527 if (i >= mList.size()) return nullptr;
528 return mList[i].get();
529 }
530 /// @copybrief Node::replacechild()
531 inline bool replacechild(const size_t i, Node* node) override final {
532 if (mList.size() <= i) return false;
533 Expression* expr = dynamic_cast<Expression*>(node);
534 if (!expr) return false;
535 mList[i].reset(expr);
536 mList[i]->setParent(this);
537 return true;
538 }
539
540 /// @brief Alias for Block::children
541 inline size_t size() const { return mList.size(); }
542 /// @brief Adds a statement to this block, transferring ownership to the
543 /// block and updating parent data on the statement. If the
544 /// statement is a nullptr, it is ignored.
545 inline void addStatement(Statement* stmnt) {
546 if (stmnt) {
547 mList.emplace_back(stmnt);
548 stmnt->setParent(this);
549 }
550 }
551 private:
552 std::vector<Statement::UniquePtr> mList;
553};
554
555/// @brief A Tree is the highest concrete (non-abstract) node in the entire AX
556/// AST hierarchy. It represents an entire conversion of a valid AX
557/// string.
558/// @note A tree is the only node type which has typedefs for use as a shared
559/// pointer. All other nodes are expected to be handled through unique
560/// pointers to infer ownership.
561/// @todo Replace block with StatementList
562 struct Tree : public Node
563{
564 using Ptr = std::shared_ptr<Tree>;
565 using ConstPtr = std::shared_ptr<const Tree>;
566 using UniquePtr = std::unique_ptr<Tree>;
567
568 /// @brief Construct a new Tree from a given Block, transferring ownership
569 /// of the Block to the tree and updating parent data on the Block.
570 /// @note The provided Block must be a valid pointer (non-null)
571 /// @param block The Block to construct from
572 Tree(Block* block = new Block())
573 : mBlock(block) {
574 mBlock->setParent(this);
575 }
576 /// @brief Deep copy constructor for a Tree, performing a deep copy on
577 /// the held Block, ensuring parent information is updated.
578 /// @param other A const reference to another Tree to deep copy
579 Tree(const Tree& other)
580 : mBlock(new Block(*other.mBlock)) {
581 mBlock->setParent(this);
582 }
583 ~Tree() override = default;
584
585 /// @copybrief Node::copy()
586 Tree* copy() const override final { return new Tree(*this); }
587 /// @copybrief Node::nodetype()
588 NodeType nodetype() const override { return Node::TreeNode; }
589 /// @copybrief Node::nodename()
590 const char* nodename() const override { return "tree"; }
591 /// @copybrief Node::subname()
592 const char* subname() const override { return "tree"; }
593 /// @copybrief Node::basetype()
594 const Node* basetype() const override { return this; }
595
596 /// @copybrief Node::children()
597 size_t children() const override final { return 1; }
598 /// @copybrief Node::child()
599 const Block* child(const size_t i) const override final {
600 if (i == 0) return mBlock.get();
601 return nullptr;
602 }
603 private:
604 Block::UniquePtr mBlock;
605};
606
607 struct CommaOperator : public Expression
608{
609 using UniquePtr = std::unique_ptr<CommaOperator>;
610
611 /// @brief Construct a new CommaOperator with an expr set
612 CommaOperator() : mExpressions() {}
613 /// @brief Construct a new CommaOperator with a single expression,
614 /// transferring ownership of the expression to the CommaOperator
615 /// and updating parent data on the expression. If the expression is
616 /// a nullptr, it is ignored.
617 /// @param expression The Expression to construct from
618 CommaOperator(Expression* expression)
619 : mExpressions() {
620 this->append(expression);
621 }
622 /// @brief Construct a new CommaOperator from a vector of expression,
623 /// transferring ownership of all valid expression to the
624 /// CommaOperator and updating parent data on the statement. Only
625 /// valid (non null) expression are added to the block.
626 /// @param expressions The vector of expressions to construct from
627 CommaOperator(const std::vector<Expression*>& expressions)
628 : mExpressions() {
629 mExpressions.reserve(expressions.size());
630 for (Expression* expression : expressions) {
631 this->append(expression);
632 }
633 }
634 /// @brief Deep copy constructor for an CommaOperator, performing a deep
635 /// copy on every held expression, ensuring parent information is
636 /// updated.
637 /// @param other A const reference to another CommaOperator to deep copy
638 CommaOperator(const CommaOperator& other)
639 : mExpressions() {
640 mExpressions.reserve(other.mExpressions.size());
641 for (const Expression::UniquePtr& expr : other.mExpressions) {
642 this->append(expr->copy());
643 }
644 }
645 ~CommaOperator() override = default;
646
647 /// @copybrief Node::copy()
648 CommaOperator* copy() const override final {
649 return new CommaOperator(*this);
650 }
651 /// @copybrief Node::nodetype()
652 NodeType nodetype() const override { return Node::CommaOperatorNode; }
653 /// @copybrief Node::nodename()
654 const char* nodename() const override { return "comma"; }
655 /// @copybrief Node::subname()
656 const char* subname() const override { return "comma"; }
657 /// @copybrief Node::basetype()
658 const Expression* basetype() const override { return this; }
659
660 /// @copybrief Node::children()
661 size_t children() const override final { return this->size(); }
662 /// @copybrief Node::child()
663 const Expression* child(const size_t i) const override final {
664 if (i >= mExpressions.size()) return nullptr;
665 return mExpressions[i].get();
666 }
667 /// @copybrief Node::replacechild()
668 inline bool replacechild(const size_t i, Node* node) override final {
669 if (mExpressions.size() <= i) return false;
670 Expression* expr = dynamic_cast<Expression*>(node);
671 mExpressions[i].reset(expr);
672 mExpressions[i]->setParent(this);
673 return true;
674 }
675
676 /// @brief Alias for CommaOperator::children
677 inline size_t size() const { return mExpressions.size(); }
678 /// @brief Query whether this Expression list holds any valid expressions
679 /// @return True if this node if empty, false otherwise
680 inline bool empty() const { return mExpressions.empty(); }
681 /// @brief Append an expression to this CommaOperator, transferring
682 /// ownership to the CommaOperator and updating parent data on the
683 /// expression. If the expression is a nullptr, it is ignored.
684 inline void append(Expression* expr) {
685 if (expr) {
686 mExpressions.emplace_back(expr);
687 expr->setParent(this);
688 }
689 }
690 private:
691 std::vector<Expression::UniquePtr> mExpressions;
692};
693
694/// @brief Loops represent for, while and do-while loop constructs.
695/// These all consist of a condition - evaluated to determine if loop
696/// iteration should continue, and a body which is the logic to be
697/// repeated. For loops also have initial statements which are evaluated
698/// prior to loop execution (at loop scope) and commonly used to
699/// set up iterators, and iteration expressions which are evaluated
700/// between iterations after the body and before the condition.
701/// Both conditions and initial statements can be declarations or
702/// expressions, so are Statements, and iteration expressions can
703/// consist of multiple expressions. The loop body is a Block defining
704/// its own scope (encapsulated by initial statement scope for for-loops).
705/// @note Only for-loops should have initial statements and/or iteration
706/// expressions. Also for-loops allow empty conditions to be given by
707/// the user, this is replaced with a 'true' expression in the parser.
708 struct Loop : public Statement
709{
710 using UniquePtr = std::unique_ptr<Loop>;
711
712 /// @brief Construct a new Loop with the type defined by a
713 /// tokens::LoopToken, a condition Statement, a Block representing
714 /// the body and for for-loops an optional initial Statement and
715 /// iteration Expression. Ownership of all arguments is
716 /// transferred to the Loop. All arguments have their parent data
717 /// updated.
718 /// @param loopType The type of loop - for, while or do-while.
719 /// @param condition The condition Statement to determine loop repetition
720 /// @param body The Block to be repeated
721 /// @param init The (optional) for-loop initial Statement.
722 /// @param iter The (optional) for-loop iteration Expression.
723 Loop(const tokens::LoopToken loopType,
724 Statement* condition,
725 Block* body,
726 Statement* init = nullptr,
727 Expression* iter = nullptr)
728 : mLoopType(loopType)
729 , mConditional(condition)
730 , mBody(body)
731 , mInitial(init)
732 , mIteration(iter) {
733 OPENVDB_ASSERT(mConditional);
734 OPENVDB_ASSERT(mBody);
735 mConditional->setParent(this);
736 mBody->setParent(this);
737 if (mInitial) {
738 OPENVDB_ASSERT(mLoopType == tokens::LoopToken::FOR);
739 mInitial->setParent(this);
740 }
741 if (mIteration) {
742 OPENVDB_ASSERT(mLoopType == tokens::LoopToken::FOR);
743 mIteration->setParent(this);
744 }
745 }
746 /// @brief Deep copy constructor for an Loop, performing a deep copy on the
747 /// condition, body and initial Statement/iteration Expression
748 /// if they exist, ensuring parent information is updated.
749 /// @param other A const reference to another Loop to deep copy
750 Loop(const Loop& other)
751 : mLoopType(other.mLoopType)
752 , mConditional(other.mConditional->copy())
753 , mBody(other.mBody->copy())
754 , mInitial(other.hasInit() ? other.mInitial->copy() : nullptr)
755 , mIteration(other.hasIter() ? other.mIteration->copy() : nullptr) {
756 mConditional->setParent(this);
757 mBody->setParent(this);
758 if (mInitial) {
759 OPENVDB_ASSERT(mLoopType == tokens::LoopToken::FOR);
760 mInitial->setParent(this);
761 }
762 if (mIteration) {
763 OPENVDB_ASSERT(mLoopType == tokens::LoopToken::FOR);
764 mIteration->setParent(this);
765 }
766 }
767 ~Loop() override = default;
768
769 /// @copybrief Node::copy()
770 Loop* copy() const override final { return new Loop(*this); }
771 /// @copybrief Node::nodetype()
772 NodeType nodetype() const override { return Node::LoopNode; }
773 /// @copybrief Node::nodename()
774 const char* nodename() const override { return "loop"; }
775 /// @copybrief Node::subname()
776 const char* subname() const override { return "loop"; }
777 /// @copybrief Node::basetype()
778 const Statement* basetype() const override { return this; }
779
780 /// @copybrief Node::children()
781 size_t children() const override final { return 4; }
782 /// @copybrief Node::child()
783 const Statement* child(const size_t i) const override final {
784 if (i == 0) return mConditional.get();
785 if (i == 1) return mBody.get();
786 if (i == 2) return mInitial.get();
787 if (i == 3) return mIteration.get();
788 return nullptr;
789 }
790 /// @copybrief Node::replacechild()
791 inline bool replacechild(const size_t i, Node* node) override final
792 {
793 if (i == 0 || i == 2) {
794 Statement* stmt = dynamic_cast<Statement*>(node);
795 if (!stmt) return false;
796 if (i == 0) {
797 mConditional.reset(stmt);
798 mConditional->setParent(this);
799 }
800 else {
801 mInitial.reset(stmt);
802 mInitial->setParent(this);
803 }
804 return true;
805 }
806 else if (i == 1) {
807 Block* blk = dynamic_cast<Block*>(node);
808 if (!blk) return false;
809 mBody.reset(blk);
810 mBody->setParent(this);
811 return true;
812 }
813 else if (i == 3) {
814 Expression* expr = dynamic_cast<Expression*>(node);
815 if (!expr) return false;
816 mIteration.reset(expr);
817 mIteration->setParent(expr);
818 return true;
819 }
820 return false;
821 }
822
823 /// @brief Query the type of loop held on this node.
824 /// @return The loop type as a tokens::LoopToken
825 inline tokens::LoopToken loopType() const { return mLoopType; }
826 /// @brief Query if this Loop has a valid initial statement
827 /// @return True if a valid initial statement exists, false otherwise
828 inline bool hasInit() const { return static_cast<bool>(this->initial()); }
829 /// @brief Query if this Loop has a valid iteration expression list
830 /// @return True if a valid iteration list exists, false otherwise
831 inline bool hasIter() const { return static_cast<bool>(this->iteration()); }
832 /// @brief Access a const pointer to the Loop condition as an abstract
833 /// statement.
834 /// @return A const pointer to the condition as a statement
835 const Statement* condition() const { return mConditional.get(); }
836 /// @brief Access a const pointer to the Loop body as a Block.
837 /// @return A const pointer to the body Block
838 const Block* body() const { return mBody.get(); }
839 /// @brief Access a const pointer to the Loop initial statement as an
840 /// abstract statement.
841 /// @return A const pointer to the initial statement as a statement
842 const Statement* initial() const { return mInitial.get(); }
843 /// @brief Access a const pointer to the Loop iteration Expression
844 /// @return A const pointer to the iteration Expression
845 const Expression* iteration() const { return mIteration.get(); }
846
847 private:
848 const tokens::LoopToken mLoopType;
849 Statement::UniquePtr mConditional;
850 Block::UniquePtr mBody;
851 Statement::UniquePtr mInitial;
852 Expression::UniquePtr mIteration;
853};
854
855/// @brief ConditionalStatements represents all combinations of 'if', 'else'
856/// and 'else if' syntax and semantics. A single ConditionalStatement
857/// only ever represents up to two branches; an 'if' (true) and an
858/// optional 'else' (false). ConditionalStatements are nested within
859/// the second 'else' branch to support 'else if' logic. As well as both
860/// 'if' and 'else' branches, a ConditionalStatement also holds an
861/// Expression related to its primary condition.
862/// @note The first 'if' branch is referred to as the 'true' branch. The
863/// second 'else' branch is referred to as the 'false' branch.
864 struct ConditionalStatement : public Statement
865{
866 using UniquePtr = std::unique_ptr<ConditionalStatement>;
867
868 /// @brief Construct a new ConditionalStatement with an Expression
869 /// representing the primary condition, a Block representing the
870 /// 'true' branch and an optional Block representing the 'false'
871 /// branch. Ownership of all arguments is transferred to the
872 /// ConditionalStatement. All arguments have their parent data
873 /// updated.
874 /// @param conditional The Expression to construct the condition from
875 /// @param trueBlock The Block to construct the true branch from
876 /// @param falseBlock The (optional) Block to construct the false branch
877 /// from
878 ConditionalStatement(Expression* conditional,
879 Block* trueBlock,
880 Block* falseBlock = nullptr)
881 : mConditional(conditional)
882 , mTrueBranch(trueBlock)
883 , mFalseBranch(falseBlock) {
884 OPENVDB_ASSERT(mConditional);
885 OPENVDB_ASSERT(mTrueBranch);
886 mConditional->setParent(this);
887 mTrueBranch->setParent(this);
888 if (mFalseBranch) mFalseBranch->setParent(this);
889 }
890 /// @brief Deep copy constructor for an ConditionalStatement, performing a
891 /// deep copy on the condition and both held branches (Blocks),
892 /// ensuring parent information is updated.
893 /// @param other A const reference to another ConditionalStatement to deep
894 /// copy
895 ConditionalStatement(const ConditionalStatement& other)
896 : mConditional(other.mConditional->copy())
897 , mTrueBranch(other.mTrueBranch->copy())
898 , mFalseBranch(other.hasFalse() ? other.mFalseBranch->copy() : nullptr) {
899 mConditional->setParent(this);
900 mTrueBranch->setParent(this);
901 if (mFalseBranch) mFalseBranch->setParent(this);
902 }
903 ~ConditionalStatement() override = default;
904
905 /// @copybrief Node::copy()
906 ConditionalStatement* copy() const override final {
907 return new ConditionalStatement(*this);
908 }
909 /// @copybrief Node::nodetype()
910 NodeType nodetype() const override { return Node::ConditionalStatementNode; }
911 /// @copybrief Node::nodename()
912 const char* nodename() const override { return "conditional statement"; }
913 /// @copybrief Node::subname()
914 const char* subname() const override { return "cond"; }
915 /// @copybrief Node::basetype()
916 const Statement* basetype() const override { return this; }
917
918 /// @copybrief Node::children()
919 size_t children() const override final { return 3; }
920 /// @copybrief Node::child()
921 const Statement* child(const size_t i) const override final {
922 if (i == 0) return this->condition();
923 if (i == 1) return this->trueBranch();
924 if (i == 2) return this->falseBranch();
925 return nullptr;
926 }
927 /// @copybrief Node::replacechild()
928 inline bool replacechild(const size_t i, Node* node) override final
929 {
930 if (i == 0) {
931 Expression* expr = dynamic_cast<Expression*>(node);
932 if (!expr) return false;
933 mConditional.reset(expr);
934 mConditional->setParent(this);
935 return true;
936 }
937 else if (i == 1 || i == 2) {
938 Block* blk = dynamic_cast<Block*>(node);
939 if (!blk) return false;
940 if (i == 1) {
941 mTrueBranch.reset(blk);
942 mTrueBranch->setParent(this);
943 }
944 else {
945 mFalseBranch.reset(blk);
946 mFalseBranch->setParent(this);
947 }
948 return true;
949 }
950 return false;
951 }
952
953 /// @brief Query if this ConditionalStatement has a valid 'false' branch
954 /// @return True if a valid 'false' branch exists, false otherwise
955 inline bool hasFalse() const {
956 return static_cast<bool>(this->falseBranch());
957 }
958 /// @brief Query the number of branches held by this ConditionalStatement.
959 /// This is only ever 1 or 2.
960 /// @return 2 if a valid 'true' and 'false' branch exist, 1 otherwise
961 size_t branchCount() const {
962 return this->hasFalse() ? 2 : 1;
963 }
964 /// @brief Access a const pointer to the ConditionalStatements condition
965 /// as an abstract expression.
966 /// @return A const pointer to the condition as an expression
967 const Expression* condition() const { return mConditional.get(); }
968 /// @brief Access a const pointer to the ConditionalStatements 'true'
969 /// branch as a Block
970 /// @return A const pointer to the 'true' branch
971 const Block* trueBranch() const { return mTrueBranch.get(); }
972 /// @brief Access a const pointer to the ConditionalStatements 'false'
973 /// branch as a Block
974 /// @return A const pointer to the 'false' branch
975 const Block* falseBranch() const { return mFalseBranch.get(); }
976 private:
977 Expression::UniquePtr mConditional;
978 Block::UniquePtr mTrueBranch;
979 Block::UniquePtr mFalseBranch;
980};
981
982/// @brief A BinaryOperator represents a single binary operation between a
983/// left hand side (LHS) and right hand side (RHS) expression. The
984/// operation type is stored as a tokens::OperatorToken enumerated type
985/// on the node. AX grammar guarantees that this token will only ever
986/// be a valid binary operator token type when initialized by the
987/// parser.
988 struct BinaryOperator : public Expression
989{
990 using UniquePtr = std::unique_ptr<BinaryOperator>;
991
992 /// @brief Construct a new BinaryOperator with a given
993 /// tokens::OperatorToken and a valid LHS and RHS expression,
994 /// transferring ownership of the expressions to the BinaryOperator
995 /// and updating parent data on the expressions.
996 /// @param left The left hand side of the binary expression
997 /// @param right The right hand side of the binary expression
998 /// @param op The binary token representing the operation to perform.
999 /// Should not be an assignment token.
1000 BinaryOperator(Expression* left,
1001 Expression* right,
1002 const tokens::OperatorToken op)
1003 : mLeft(left)
1004 , mRight(right)
1005 , mOperation(op) {
1006 OPENVDB_ASSERT(mLeft);
1007 OPENVDB_ASSERT(mRight);
1008 mLeft->setParent(this);
1009 mRight->setParent(this);
1010 }
1011 /// @brief Construct a new BinaryOperator with a string, delegating
1012 /// construction to the above BinaryOperator constructor.
1013 /// @param left The left hand side of the binary expression
1014 /// @param right The right hand side of the binary expression
1015 /// @param op A string representing the binary operation to perform
1016 BinaryOperator(Expression* left,
1017 Expression* right,
1018 const std::string& op)
1019 : BinaryOperator(left, right, tokens::operatorTokenFromName(op)) {}
1020 /// @brief Deep copy constructor for a BinaryOperator, performing a
1021 /// deep copy on both held expressions, ensuring parent information
1022 /// is updated.
1023 /// @param other A const reference to another BinaryOperator to deep copy
1024 BinaryOperator(const BinaryOperator& other)
1025 : mLeft(other.mLeft->copy())
1026 , mRight(other.mRight->copy())
1027 , mOperation(other.mOperation) {
1028 mLeft->setParent(this);
1029 mRight->setParent(this);
1030 }
1031 ~BinaryOperator() override = default;
1032
1033 /// @copybrief Node::copy()
1034 BinaryOperator* copy() const override final {
1035 return new BinaryOperator(*this);
1036 }
1037 /// @copybrief Node::nodetype()
1038 NodeType nodetype() const override { return Node::BinaryOperatorNode; }
1039 /// @copybrief Node::nodename()
1040 const char* nodename() const override { return "binary"; }
1041 /// @copybrief Node::subname()
1042 const char* subname() const override { return "bin"; }
1043 /// @copybrief Node::basetype()
1044 const Expression* basetype() const override { return this; }
1045 /// @copybrief Node::children()
1046 size_t children() const override final { return 2; }
1047 /// @copybrief Node::child()
1048 const Expression* child(const size_t i) const override final {
1049 if (i == 0) return mLeft.get();
1050 if (i == 1) return mRight.get();
1051 return nullptr;
1052 }
1053 /// @copybrief Node::replacechild()
1054 inline bool replacechild(const size_t i, Node* node) override final {
1055 if (i > 1) return false;
1056 Expression* expr = dynamic_cast<Expression*>(node);
1057 if (!expr) return false;
1058 if (i == 0) {
1059 mLeft.reset(expr);
1060 mLeft->setParent(this);
1061 }
1062 else if (i == 1) {
1063 mRight.reset(expr);
1064 mRight->setParent(this);
1065 }
1066 return true;
1067 }
1068
1069 /// @brief Query the type of binary operation held on this node.
1070 /// @return The binary operation as a tokens::OperatorToken
1071 inline tokens::OperatorToken operation() const { return mOperation; }
1072 /// @brief Access a const pointer to the BinaryOperator LHS as an abstract
1073 /// expression
1074 /// @return A const pointer to the LHS expression
1075 const Expression* lhs() const { return mLeft.get(); }
1076 /// @brief Access a const pointer to the BinaryOperator RHS as an abstract
1077 /// expression
1078 /// @return A const pointer to the RHS expression
1079 const Expression* rhs() const { return mRight.get(); }
1080 private:
1081 Expression::UniquePtr mLeft;
1082 Expression::UniquePtr mRight;
1083 const tokens::OperatorToken mOperation;
1084};
1085
1086/// @brief A TernaryOperator represents a ternary (conditional) expression
1087/// 'a ? b : c' which evaluates to 'b' if 'a' is true and 'c' if 'a' is false.
1088/// Requires 'b' and 'c' to be convertibly typed expressions, or both void.
1089/// The 'true' expression ('b') is optional with the conditional expression 'a'
1090/// returned if it evaluates to true, otherwise returning 'c'. Note that 'a'
1091/// will only be evaluated once in this case.
1092 struct TernaryOperator : public Expression
1093{
1094 using UniquePtr = std::unique_ptr<TernaryOperator>;
1095
1096 /// @brief Construct a new TernaryOperator with a conditional expression
1097 /// and true (optional) and false expressions, transferring
1098 /// ownership of the expressions to the TernaryOperator
1099 /// and updating parent data on the expressions.
1100 /// @param conditional The conditional expression determining the expression
1101 /// selection
1102 /// @param trueExpression The (optional) expression evaluated if the condition
1103 /// is true
1104 /// @param falseExpression The expression evaluated if the condition is false
1105 TernaryOperator(Expression* conditional,
1106 Expression* trueExpression,
1107 Expression* falseExpression)
1108 : mConditional(conditional)
1109 , mTrueBranch(trueExpression)
1110 , mFalseBranch(falseExpression) {
1111 OPENVDB_ASSERT(mConditional);
1112 OPENVDB_ASSERT(mFalseBranch);
1113 mConditional->setParent(this);
1114 if (mTrueBranch) mTrueBranch->setParent(this);
1115 mFalseBranch->setParent(this);
1116 }
1117 /// @brief Deep copy constructor for a TernaryOperator, performing a
1118 /// deep copy on held expressions, ensuring parent information
1119 /// is updated.
1120 /// @param other A const reference to another TernaryOperator to deep copy
1121 TernaryOperator(const TernaryOperator& other)
1122 : mConditional(other.mConditional->copy())
1123 , mTrueBranch(other.hasTrue() ? other.mTrueBranch->copy() : nullptr)
1124 , mFalseBranch(other.mFalseBranch->copy()) {
1125 mConditional->setParent(this);
1126 if (mTrueBranch) mTrueBranch->setParent(this);
1127 mFalseBranch->setParent(this);
1128 }
1129 ~TernaryOperator() override = default;
1130
1131 /// @copybrief Node::copy()
1132 TernaryOperator* copy() const override final {
1133 return new TernaryOperator(*this);
1134 }
1135 /// @copybrief Node::nodetype()
1136 NodeType nodetype() const override { return Node::TernaryOperatorNode; }
1137 /// @copybrief Node::nodename()
1138 const char* nodename() const override { return "ternary"; }
1139 /// @copybrief Node::subname()
1140 const char* subname() const override { return "tern"; }
1141 /// @copybrief Node::basetype()
1142 const Expression* basetype() const override { return this; }
1143 /// @copybrief Node::children()
1144 size_t children() const override final { return 3; }
1145 /// @copybrief Node::child()
1146 const Expression* child(const size_t i) const override final {
1147 if (i == 0) return mConditional.get();
1148 if (i == 1) return mTrueBranch.get();
1149 if (i == 2) return mFalseBranch.get();
1150 return nullptr;
1151 }
1152 /// @copybrief Node::replacechild()
1153 inline bool replacechild(const size_t i, Node* node) override final {
1154 if (i > 2) return false;
1155 Expression* expr = dynamic_cast<Expression*>(node);
1156 if (!expr) return false;
1157 if (i == 0) {
1158 mConditional.reset(expr);
1159 mConditional->setParent(this);
1160 }
1161 else if (i == 1) {
1162 mTrueBranch.reset(expr);
1163 mTrueBranch->setParent(this);
1164 }
1165 else if (i == 2) {
1166 mFalseBranch.reset(expr);
1167 mFalseBranch->setParent(this);
1168 }
1169 return true;
1170 }
1171
1172 /// @brief Query whether or not this has an optional if-true branch.
1173 bool hasTrue() const { return static_cast<bool>(this->trueBranch()); }
1174 /// @brief Access a const pointer to the TernaryOperator conditional as
1175 /// an abstract expression
1176 /// @return A const pointer to the conditional expression
1177 const Expression* condition() const { return mConditional.get(); }
1178 /// @brief Access a const pointer to the TernaryOperator true expression as
1179 /// an abstract expression
1180 /// @return A const pointer to the true expression
1181 const Expression* trueBranch() const { return mTrueBranch.get(); }
1182 /// @brief Access a const pointer to the TernaryOperator false expression as
1183 /// an abstract expression
1184 /// @return A const pointer to the false expression
1185 const Expression* falseBranch() const { return mFalseBranch.get(); }
1186 private:
1187 Expression::UniquePtr mConditional;
1188 Expression::UniquePtr mTrueBranch;
1189 Expression::UniquePtr mFalseBranch;
1190};
1191
1192/// @brief AssignExpressions represents a similar object construction to a
1193/// BinaryOperator. AssignExpressions can be chained together and are
1194/// thus derived as Expressions rather than Statements.
1195/// @note AssignExpressions can either be direct or compound assignments. The
1196/// latter is represented by the last argument in the primary
1197/// constructor which is expected to be a valid binary token.
1198 struct AssignExpression : public Expression
1199{
1200 using UniquePtr = std::unique_ptr<AssignExpression>;
1201
1202 /// @brief Construct a new AssignExpression with valid LHS and RHS
1203 /// expressions, transferring ownership of the expressions to the
1204 /// AssignExpression and updating parent data on the expressions.
1205 /// @param lhs The left hand side of the assign expression
1206 /// @param rhs The right hand side of the assign expression
1207 /// @param op The compound assignment token, if any
1208 AssignExpression(Expression* lhs, Expression* rhs,
1209 const tokens::OperatorToken op = tokens::EQUALS)
1210 : mLHS(lhs)
1211 , mRHS(rhs)
1212 , mOperation(op) {
1213 OPENVDB_ASSERT(mLHS);
1214 OPENVDB_ASSERT(mRHS);
1215 mLHS->setParent(this);
1216 mRHS->setParent(this);
1217 }
1218 /// @brief Deep copy constructor for an AssignExpression, performing a
1219 /// deep copy on both held expressions, ensuring parent information
1220 /// is updated.
1221 /// @param other A const reference to another AssignExpression to deep
1222 /// copy
1223 AssignExpression(const AssignExpression& other)
1224 : mLHS(other.mLHS->copy())
1225 , mRHS(other.mRHS->copy())
1226 , mOperation(other.mOperation) {
1227 mLHS->setParent(this);
1228 mRHS->setParent(this);
1229 }
1230 ~AssignExpression() override = default;
1231
1232 /// @copybrief Node::copy()
1233 AssignExpression* copy() const override final {
1234 return new AssignExpression(*this);
1235 }
1236 /// @copybrief Node::nodetype()
1237 NodeType nodetype() const override { return Node::AssignExpressionNode; }
1238 /// @copybrief Node::nodename()
1239 const char* nodename() const override { return "assignment expression"; }
1240 /// @copybrief Node::subname()
1241 const char* subname() const override { return "asgn"; }
1242 /// @copybrief Node::basetype()
1243 const Expression* basetype() const override { return this; }
1244 /// @copybrief Node::children()
1245 size_t children() const override final { return 2; }
1246 /// @copybrief Node::child()
1247 const Expression* child(const size_t i) const override final {
1248 if (i == 0) return this->lhs();
1249 if (i == 1) return this->rhs();
1250 return nullptr;
1251 }
1252 /// @copybrief Node::replacechild()
1253 inline bool replacechild(const size_t i, Node* node) override final {
1254 if (i > 1) return false;
1255 Expression* expr = dynamic_cast<Expression*>(node);
1256 if (!expr) return false;
1257 if (i == 0) {
1258 mLHS.reset(expr);
1259 mLHS->setParent(this);
1260 }
1261 else if (i == 1) {
1262 mRHS.reset(expr);
1263 mRHS->setParent(this);
1264 }
1265 return true;
1266 }
1267
1268 /// @brief Query whether or not this is a compound AssignExpression.
1269 /// Compound AssignExpressions are assignments which read and write
1270 /// to the LHS value. i.e. +=, -=, *= etc
1271 /// @return The binary operation as a tokens::OperatorToken
1272 inline bool isCompound() const { return mOperation != tokens::EQUALS; }
1273 /// @brief Query the actual operational type of this AssignExpression. For
1274 /// simple (non-compound) AssignExpressions, tokens::EQUALS is
1275 /// returned.
1276 inline tokens::OperatorToken operation() const { return mOperation; }
1277 /// @brief Access a const pointer to the AssignExpression LHS as an
1278 /// abstract expression
1279 /// @return A const pointer to the LHS expression
1280 const Expression* lhs() const { return mLHS.get(); }
1281 /// @brief Access a const pointer to the AssignExpression RHS as an
1282 //// abstract expression
1283 /// @return A const pointer to the RHS expression
1284 const Expression* rhs() const { return mRHS.get(); }
1285 private:
1286 Expression::UniquePtr mLHS;
1287 Expression::UniquePtr mRHS;
1288 const tokens::OperatorToken mOperation;
1289};
1290
1291/// @brief A Crement node represents a single increment '++' and decrement '--'
1292/// operation. As well as it's crement type, it also stores whether
1293/// the semantics constructed a post or pre-crement i.e. ++a or a++.
1294 struct Crement : public Expression
1295{
1296 using UniquePtr = std::unique_ptr<Crement>;
1297
1298 /// @brief A simple enum representing the crement type.
1299 enum Operation {
1300 Increment,
1301 Decrement
1302 };
1303
1304 /// @brief Construct a new Crement with a valid expression, transferring
1305 /// ownership of the expression to the Crement node and updating
1306 /// parent data on the expression.
1307 /// @param expr The expression to crement
1308 /// @param op The type of crement operation; Increment or Decrement
1309 /// @param post True if the crement operation is a post crement i.e. a++,
1310 /// false if the operation is a pre crement i.e. ++a
1311 Crement(Expression* expr, const Operation op, bool post)
1312 : mExpression(expr)
1313 , mOperation(op)
1314 , mPost(post) {
1315 mExpression->setParent(this);
1316 }
1317 /// @brief Deep copy constructor for a Crement, performing a deep copy on
1318 /// the underlying expressions, ensuring parent information is
1319 /// updated.
1320 /// @param other A const reference to another Crement to deep copy
1321 Crement(const Crement& other)
1322 : mExpression(other.mExpression->copy())
1323 , mOperation(other.mOperation)
1324 , mPost(other.mPost) {
1325 mExpression->setParent(this);
1326 }
1327 ~Crement() override = default;
1328
1329 /// @copybrief Node::copy()
1330 Crement* copy() const override final { return new Crement(*this); }
1331 /// @copybrief Node::nodetype()
1332 NodeType nodetype() const override { return Node::CrementNode; }
1333 /// @copybrief Node::nodename()
1334 const char* nodename() const override { return "crement"; }
1335 /// @copybrief Node::subname()
1336 const char* subname() const override { return "crmt"; }
1337 /// @copybrief Node::basetype()
1338 const Expression* basetype() const override { return this; }
1339 //
1340 /// @copybrief Node::children()
1341 size_t children() const override final { return 1; }
1342 /// @copybrief Node::child()
1343 const Expression* child(const size_t i) const override final {
1344 if (i == 0) return this->expression();
1345 return nullptr;
1346 }
1347 /// @copybrief Node::replacechild()
1348 inline bool replacechild(const size_t i, Node* node) override final {
1349 if (i != 0) return false;
1350 Expression* expr = dynamic_cast<Expression*>(node);
1351 if (!expr) return false;
1352 mExpression.reset(expr);
1353 mExpression->setParent(this);
1354 return true;
1355 }
1356
1357 /// @brief Query the type of the Crement operation. This does not hold
1358 /// post or pre-crement information.
1359 /// @return The Crement operation being performed. This is either an
1360 /// Crement::Increment or Crement::Decrement.
1361 inline Operation operation() const { return mOperation; }
1362 /// @brief Query if this Crement node represents an incrementation ++
1363 /// @return True if this node is performing an increment
1364 inline bool increment() const { return mOperation == Increment; }
1365 /// @brief Query if this Crement node represents an decrement --
1366 /// @return True if this node is performing an decrement
1367 inline bool decrement() const { return mOperation == Decrement; }
1368 /// @brief Query if this Crement node represents a pre crement ++a
1369 /// @return True if this node is performing a pre crement
1370 inline bool pre() const { return !mPost; }
1371 /// @brief Query if this Crement node represents a post crement a++
1372 /// @return True if this node is performing a post crement
1373 inline bool post() const { return mPost; }
1374 /// @brief Access a const pointer to the expression being crements as an
1375 /// abstract Expression
1376 /// @return A const pointer to the expression
1377 const Expression* expression() const { return mExpression.get(); }
1378 private:
1379 Expression::UniquePtr mExpression;
1380 const Operation mOperation;
1381 const bool mPost;
1382};
1383
1384/// @brief A UnaryOperator represents a single unary operation on an
1385/// expression. The operation type is stored as a tokens::OperatorToken
1386/// enumerated type on the node. AX grammar guarantees that this token
1387/// will only every be a valid unary operator token type when
1388/// initialized by the parser.
1389 struct UnaryOperator : public Expression
1390{
1391 using UniquePtr = std::unique_ptr<UnaryOperator>;
1392
1393 /// @brief Construct a new UnaryOperator with a given tokens::OperatorToken
1394 /// and a valid expression, transferring ownership of the expression
1395 /// to the UnaryOperator and updating parent data on the expression.
1396 /// @param expr The expression to perform the unary operator on
1397 /// @param op The unary token representing the operation to perform.
1398 UnaryOperator(Expression* expr, const tokens::OperatorToken op)
1399 : mExpression(expr)
1400 , mOperation(op) {
1401 OPENVDB_ASSERT(mExpression);
1402 mExpression->setParent(this);
1403 }
1404 /// @brief Construct a new UnaryOperator with a string, delegating
1405 /// construction to the above UnaryOperator constructor.
1406 /// @param op A string representing the unary operation to perform
1407 /// @param expr The expression to perform the unary operator on
1408 UnaryOperator(Expression* expr, const std::string& op)
1409 : UnaryOperator(expr, tokens::operatorTokenFromName(op)) {}
1410 /// @brief Deep copy constructor for a UnaryOperator, performing a deep
1411 /// copy on the underlying expressions, ensuring parent information
1412 /// is updated.
1413 /// @param other A const reference to another UnaryOperator to deep copy
1414 UnaryOperator(const UnaryOperator& other)
1415 : mExpression(other.mExpression->copy())
1416 , mOperation(other.mOperation) {
1417 mExpression->setParent(this);
1418 }
1419 ~UnaryOperator() override = default;
1420
1421 /// @copybrief Node::copy()
1422 UnaryOperator* copy() const override final { return new UnaryOperator(*this); }
1423 /// @copybrief Node::nodetype()
1424 NodeType nodetype() const override { return Node::UnaryOperatorNode; }
1425 /// @copybrief Node::nodename()
1426 const char* nodename() const override { return "unary"; }
1427 /// @copybrief Node::subname()
1428 const char* subname() const override { return "unry"; }
1429 /// @copybrief Node::basetype()
1430 const Expression* basetype() const override { return this; }
1431 /// @copybrief Node::children()
1432 size_t children() const override final { return 1; }
1433 /// @copybrief Node::child()
1434 const Expression* child(const size_t i) const override final {
1435 if (i == 0) return this->expression();
1436 return nullptr;
1437 }
1438 /// @copybrief Node::replacechild()
1439 inline bool replacechild(const size_t i, Node* node) override final {
1440 if (i != 0) return false;
1441 Expression* expr = dynamic_cast<Expression*>(node);
1442 if (!expr) return false;
1443 mExpression.reset(expr);
1444 mExpression->setParent(this);
1445 return true;
1446 }
1447
1448 /// @brief Query the type of unary operation held on this node.
1449 /// @return The unary operation as a tokens::OperatorToken
1450 inline tokens::OperatorToken operation() const { return mOperation; }
1451 /// @brief Access a const pointer to the UnaryOperator expression as an
1452 /// abstract expression
1453 /// @return A const pointer to the expression
1454 const Expression* expression() const { return mExpression.get(); }
1455 private:
1456 Expression::UniquePtr mExpression;
1457 const tokens::OperatorToken mOperation;
1458};
1459
1460/// @brief Cast nodes represent the conversion of an underlying expression to
1461/// a target type. Cast nodes are typically constructed from functional
1462/// notation and do not represent construction of the target type,
1463/// rather a type-casted conversion.
1464 struct Cast : public Expression
1465{
1466 using UniquePtr = std::unique_ptr<Cast>;
1467
1468 /// @brief Construct a new Cast with a valid expression and a target
1469 /// tokens::CoreType, transferring ownership of the expression to
1470 /// the Cast and updating parent data on the expression.
1471 /// @param expr The expression to perform the cast operator on
1472 /// @param type The target cast type
1473 Cast(Expression* expr, const tokens::CoreType type)
1474 : Expression()
1475 , mType(type)
1476 , mExpression(expr) {
1477 OPENVDB_ASSERT(mExpression);
1478 mExpression->setParent(this);
1479 }
1480 /// @brief Deep copy constructor for a Cast node, performing a deep copy on
1481 /// the underlying expressions, ensuring parent information is
1482 /// updated.
1483 /// @param other A const reference to another Cast node to deep copy
1484 Cast(const Cast& other)
1485 : Expression()
1486 , mType(other.mType)
1487 , mExpression(other.mExpression->copy()) {
1488 mExpression->setParent(this);
1489 }
1490 ~Cast() override = default;
1491
1492 /// @copybrief Node::copy()
1493 Cast* copy() const override final { return new Cast(*this); }
1494 /// @copybrief Node::nodetype()
1495 NodeType nodetype() const override { return Node::CastNode; }
1496 /// @copybrief Node::nodename()
1497 const char* nodename() const override { return "cast"; }
1498 /// @copybrief Node::subname()
1499 const char* subname() const override { return "cast"; }
1500 /// @copybrief Node::basetype()
1501 const Expression* basetype() const override { return this; }
1502 /// @copybrief Node::children()
1503 size_t children() const override final { return 1; }
1504 /// @copybrief Node::child()
1505 const Expression* child(const size_t i) const override final {
1506 if (i == 0) return this->expression();
1507 return nullptr;
1508 }
1509 /// @copybrief Node::replacechild()
1510 inline bool replacechild(const size_t i, Node* node) override final {
1511 if (i != 0) return false;
1512 Expression* expr = dynamic_cast<Expression*>(node);
1513 if (!expr) return false;
1514 mExpression.reset(expr);
1515 mExpression->setParent(this);
1516 return true;
1517 }
1518
1519 /// @brief Access to the target type
1520 /// @return a tokens::CoreType enumerable type therepresenting the target type
1521 inline tokens::CoreType type() const { return mType; }
1522 /// @brief Get the target type as a front end AX type/token string
1523 /// @note This returns the associated token to the type, not necessarily
1524 /// equal to the OpenVDB type string
1525 /// @return A string representing the type/token
1526 inline std::string typestr() const {
1527 return ast::tokens::typeStringFromToken(mType);
1528 }
1529 /// @brief Access a const pointer to the Cast node's expression as an
1530 /// abstract expression
1531 /// @return A const pointer to the expression
1532 const Expression* expression() const { return mExpression.get(); }
1533 private:
1534 const tokens::CoreType mType;
1535 Expression::UniquePtr mExpression;
1536};
1537
1538/// @brief FunctionCalls represent a single call to a function and any provided
1539/// arguments. The argument list can be empty. The function name is
1540/// expected to exist in the AX function registry.
1541 struct FunctionCall : public Expression
1542{
1543 using UniquePtr = std::unique_ptr<FunctionCall>;
1544
1545 /// @brief Construct a new FunctionCall with a given function identifier
1546 /// and an optional argument, transferring ownership of any
1547 /// provided argument to the FunctionCall and updating parent data
1548 /// on the arguments.
1549 /// @param function The name/identifier of the function
1550 /// @param argument Function argument
1551 FunctionCall(const std::string& function,
1552 Expression* argument = nullptr)
1553 : mFunctionName(function)
1554 , mArguments() {
1555 this->append(argument);
1556 }
1557 /// @brief Construct a new FunctionCall with a given function identifier
1558 /// and optional argument list, transferring ownership of any
1559 /// provided arguments to the FunctionCall and updating parent data
1560 /// on the arguments.
1561 /// @param function The name/identifier of the function
1562 /// @param arguments Function arguments
1563 FunctionCall(const std::string& function,
1564 const std::vector<Expression*>& arguments)
1565 : mFunctionName(function)
1566 , mArguments() {
1567 mArguments.reserve(arguments.size());
1568 for (Expression* arg : arguments) {
1569 this->append(arg);
1570 }
1571 }
1572 /// @brief Deep copy constructor for a FunctionCall, performing a deep copy
1573 /// on all held function arguments, ensuring parent information is
1574 /// updated.
1575 /// @param other A const reference to another FunctionCall to deep copy
1576 FunctionCall(const FunctionCall& other)
1577 : mFunctionName(other.mFunctionName)
1578 , mArguments() {
1579 mArguments.reserve(other.mArguments.size());
1580 for (const Expression::UniquePtr& expr : other.mArguments) {
1581 this->append(expr->copy());
1582 }
1583 }
1584 ~FunctionCall() override = default;
1585
1586 /// @copybrief Node::copy()
1587 FunctionCall* copy() const override final { return new FunctionCall(*this); }
1588 /// @copybrief Node::nodetype()
1589 NodeType nodetype() const override { return Node::FunctionCallNode; }
1590 /// @copybrief Node::nodename()
1591 const char* nodename() const override { return "function call"; }
1592 /// @copybrief Node::subname()
1593 const char* subname() const override { return "call"; }
1594 /// @copybrief Node::basetype()
1595 const Expression* basetype() const override { return this; }
1596 /// @copybrief Node::children()
1597 size_t children() const override final { return this->size(); }
1598 /// @copybrief Node::child()
1599 const Expression* child(const size_t i) const override final {
1600 if (i >= mArguments.size()) return nullptr;
1601 return mArguments[i].get();
1602 }
1603 /// @copybrief Node::replacechild()
1604 inline bool replacechild(const size_t i, Node* node) override final {
1605 if (mArguments.size() <= i) return false;
1606 Expression* expr = dynamic_cast<Expression*>(node);
1607 mArguments[i].reset(expr);
1608 mArguments[i]->setParent(this);
1609 return true;
1610 }
1611
1612 /// @brief Access the function name/identifier
1613 /// @return A const reference to the function name
1614 inline const std::string& name() const { return mFunctionName; }
1615 /// @brief Query the total number of arguments stored on this function
1616 /// @return The number of arguments. Can be 0
1617 inline size_t numArgs() const { return mArguments.size(); }
1618
1619 /// @brief Alias for FunctionCall::children
1620 inline size_t size() const { return mArguments.size(); }
1621 /// @brief Query whether this Expression list holds any valid expressions
1622 /// @return True if this node if empty, false otherwise
1623 inline bool empty() const { return mArguments.empty(); }
1624 /// @brief Appends an argument to this function call, transferring
1625 /// ownership to the FunctionCall and updating parent data on the
1626 /// expression. If the expression is a nullptr, it is ignored.
1627 inline void append(Expression* expr) {
1628 if (expr) {
1629 mArguments.emplace_back(expr);
1630 expr->setParent(this);
1631 }
1632 }
1633 private:
1634 const std::string mFunctionName;
1635 std::vector<Expression::UniquePtr> mArguments;
1636};
1637
1638/// @brief Keywords represent keyword statements defining changes in execution.
1639/// These include those that define changes in loop execution such as
1640/// break and continue, as well as return statements.
1641 struct Keyword : public Statement
1642{
1643 using UniquePtr = std::unique_ptr<Keyword>;
1644
1645 /// @brief Construct a new Keyword with a given tokens::KeywordToken.
1646 /// @param keyw The keyword token.
1647 Keyword(const tokens::KeywordToken keyw)
1648 : mKeyword(keyw) {}
1649 /// @brief Deep copy constructor for a Keyword.
1650 /// @param other A const reference to another Keyword to deep copy
1651 Keyword(const Keyword& other)
1652 : mKeyword(other.mKeyword) {}
1653 ~Keyword() override = default;
1654
1655 /// @copybrief Node::copy()
1656 Keyword* copy() const override final { return new Keyword(*this); }
1657 /// @copybrief Node::nodetype()
1658 NodeType nodetype() const override { return Node::KeywordNode; }
1659 /// @copybrief Node::nodename()
1660 const char* nodename() const override { return "keyword"; }
1661 /// @copybrief Node::subname()
1662 const char* subname() const override { return "keyw"; }
1663 /// @copybrief Node::basetype()
1664 const Statement* basetype() const override { return this; }
1665 /// @copybrief Node::children()
1666 size_t children() const override final { return 0; }
1667 /// @copybrief Node::child()
1668 const Node* child(const size_t) const override final {
1669 return nullptr;
1670 }
1671 /// @brief Query the keyword held on this node.
1672 /// @return The keyword as a tokens::KeywordToken
1673 inline tokens::KeywordToken keyword() const { return mKeyword; }
1674
1675 private:
1676 const tokens::KeywordToken mKeyword;
1677};
1678
1679/// @brief ArrayUnpack represent indexing operations into AX container types,
1680/// primarily vectors and matrices indexed by the square brackets []
1681/// syntax. Multiple levels of indirection (multiple components) can
1682/// be specified but current construction is limited to either a single
1683/// or double component lookup. Providing two components infers a matrix
1684/// indexing operation.
1685/// @note Single indexing operations are still valid for matrix indexing
1686 struct ArrayUnpack : public Expression
1687{
1688 using UniquePtr = std::unique_ptr<ArrayUnpack>;
1689
1690 /// @brief Construct a new ArrayUnpack with a valid expression, an initial
1691 /// component (as an expression) to the first access and an optional
1692 /// second component (as an expression) to a second access.
1693 /// @note Providing a second component automatically infers this
1694 /// ArrayUnpack as a matrix indexing operation. Ownership is
1695 /// transferred and parent data is updated for all arguments.
1696 /// @param expr The expression to perform the unpacking operation on
1697 /// @param component0 The first component access
1698 /// @param component1 The second component access
1699 ArrayUnpack(Expression* expr,
1700 Expression* component0,
1701 Expression* component1 = nullptr)
1702 : mIdx0(component0)
1703 , mIdx1(component1)
1704 , mExpression(expr) {
1705 OPENVDB_ASSERT(mIdx0);
1706 OPENVDB_ASSERT(mExpression);
1707 mIdx0->setParent(this);
1708 if(mIdx1) mIdx1->setParent(this);
1709 mExpression->setParent(this);
1710 }
1711 /// @brief Deep copy constructor for a ArrayUnpack, performing a deep
1712 /// copy on the expression being indexed and all held components,
1713 /// ensuring parent information is updated.
1714 /// @param other A const reference to another ArrayUnpack to deep copy
1715 ArrayUnpack(const ArrayUnpack& other)
1716 : ArrayUnpack(other.mExpression->copy(),
1717 other.mIdx0->copy(),
1718 other.mIdx1 ? other.mIdx1->copy() : nullptr) {}
1719
1720 ~ArrayUnpack() override = default;
1721
1722 /// @copybrief Node::copy()
1723 ArrayUnpack* copy() const override final { return new ArrayUnpack(*this); }
1724 /// @copybrief Node::nodetype()
1725 NodeType nodetype() const override { return Node::ArrayUnpackNode; }
1726 /// @copybrief Node::nodename()
1727 const char* nodename() const override { return "array unpack"; }
1728 /// @copybrief Node::subname()
1729 const char* subname() const override { return "unpk"; }
1730 /// @copybrief Node::basetype()
1731 const Expression* basetype() const override { return this; }
1732 /// @copybrief Node::children()
1733 size_t children() const override final { return 3; }
1734 /// @copybrief Node::child()
1735 const Statement* child(const size_t i) const override final {
1736 if (i == 0) return this->component0();
1737 if (i == 1) return this->component1();
1738 if (i == 2) return this->expression();
1739 return nullptr;
1740 }
1741 /// @copybrief Node::replacechild()
1742 inline bool replacechild(const size_t i, Node* node) override final {
1743 if (i > 2) return false;
1744 Expression* expr = dynamic_cast<Expression*>(node);
1745 if (!expr) return false;
1746 if (i == 0) mIdx0.reset(expr);
1747 if (i == 1) mIdx1.reset(expr);
1748 if (i == 2) mExpression.reset(expr);
1749 expr->setParent(this);
1750 return true;
1751 }
1752
1753 /// @brief Access a const pointer to the first component being used as an
1754 /// abstract Expression
1755 /// @return A const pointer to the first component
1756 inline const Expression* component0() const { return mIdx0.get(); }
1757 /// @brief Access a const pointer to the second component being used as an
1758 /// abstract Expression
1759 /// @note This can be a nullptr for single indexing operations
1760 /// @return A const pointer to the second component
1761 inline const Expression* component1() const { return mIdx1.get(); }
1762 /// @brief Access a const pointer to the expression being indexed as an
1763 /// abstract Expression
1764 /// @return A const pointer to the expression
1765 inline const Expression* expression() const { return mExpression.get(); }
1766 /// @brief Query whether this ArrayUnpack operation must be a matrix
1767 /// indexing operation by checking the presence of a second
1768 /// component access.
1769 /// @note This method only guarantees that the indexing operation must be
1770 /// a matrix index. Single indexing is also valid for matrices and
1771 /// other multi dimensional containers
1772 /// @return True if this is a double indexing operation, only valid for
1773 /// matrices
1774 inline bool isMatrixIndex() const {
1775 // assumes that component0 is always valid
1776 return static_cast<bool>(this->component1());
1777 }
1778 private:
1779 Expression::UniquePtr mIdx0, mIdx1;
1780 Expression::UniquePtr mExpression;
1781};
1782
1783/// @brief ArrayPacks represent temporary container creations of arbitrary
1784/// sizes, typically generated through the use of curly braces {}.
1785 struct ArrayPack : public Expression
1786{
1787 using UniquePtr = std::unique_ptr<ArrayPack>;
1788
1789 /// @brief Construct a new ArrayPack with a single expression, transferring
1790 /// ownership of the expression to the ArrayPack and updating parent
1791 /// data on the expression. If the expression is a nullptr, it is
1792 /// ignored.
1793 /// @param expression The Expression to construct from
1794 ArrayPack(Expression* expression)
1795 : mExpressions() {
1796 this->append(expression);
1797 }
1798 /// @brief Construct a new ArrayPack transferring ownership of any
1799 /// provided arguments to the ArrayPack and updating parent data
1800 /// on the arguments.
1801 /// @param arguments ArrayPack arguments
1802 ArrayPack(const std::vector<Expression*>& arguments)
1803 : mExpressions() {
1804 mExpressions.reserve(arguments.size());
1805 for (Expression* arg : arguments) {
1806 this->append(arg);
1807 }
1808 }
1809 /// @brief Deep copy constructor for a ArrayPack, performing a deep copy
1810 /// on all held arguments, ensuring parent information is updated.
1811 /// @param other A const reference to another ArrayPack to deep copy
1812 ArrayPack(const ArrayPack& other)
1813 : mExpressions() {
1814 mExpressions.reserve(other.mExpressions.size());
1815 for (const Expression::UniquePtr& expr : other.mExpressions) {
1816 this->append(expr->copy());
1817 }
1818 }
1819 ~ArrayPack() override = default;
1820
1821 /// @copybrief Node::copy()
1822 ArrayPack* copy() const override final { return new ArrayPack(*this); }
1823 /// @copybrief Node::nodetype()
1824 NodeType nodetype() const override { return Node::ArrayPackNode; }
1825 /// @copybrief Node::nodename()
1826 const char* nodename() const override { return "array pack"; }
1827 /// @copybrief Node::subname()
1828 const char* subname() const override { return "pack"; }
1829 /// @copybrief Node::basetype()
1830 const Expression* basetype() const override { return this; }
1831 /// @copybrief Node::children()
1832 size_t children() const override final { return this->size(); }
1833 /// @copybrief Node::child()
1834 const Expression* child(const size_t i) const override final {
1835 if (i >= mExpressions.size()) return nullptr;
1836 return mExpressions[i].get();
1837 }
1838 /// @copybrief Node::replacechild()
1839 inline bool replacechild(const size_t i, Node* node) override final {
1840 if (mExpressions.size() <= i) return false;
1841 Expression* expr = dynamic_cast<Expression*>(node);
1842 mExpressions[i].reset(expr);
1843 mExpressions[i]->setParent(this);
1844 return true;
1845 }
1846
1847 /// @brief Alias for ArrayPack::children
1848 inline size_t size() const { return mExpressions.size(); }
1849 /// @brief Query whether this Expression list holds any valid expressions
1850 /// @return True if this node if empty, false otherwise
1851 inline bool empty() const { return mExpressions.empty(); }
1852 /// @brief Appends an argument to this ArrayPack, transferring ownership
1853 /// to the ArrayPack and updating parent data on the expression.
1854 /// If the expression is a nullptr, it is ignored.
1855 inline void append(Expression* expr) {
1856 if (expr) {
1857 mExpressions.emplace_back(expr);
1858 expr->setParent(this);
1859 }
1860 }
1861 private:
1862 std::vector<Expression::UniquePtr> mExpressions;
1863};
1864
1865/// @brief Attributes represent any access to a primitive value, typically
1866/// associated with the '@' symbol syntax. Note that the AST does not
1867/// store any additional information on the given attribute other than
1868/// its name and type, which together form a unique Attribute identifier
1869/// known as the Attribute 'token'. A 'primitive value' in this instance
1870/// refers to a value on an OpenVDB Volume or OpenVDB Points tree.
1871/// @note The ExternalVariable AST node works in a similar way
1872/// @note An Attribute is a complete "leaf-level" AST node. It has no children
1873/// and nothing derives from it.
1874 struct Attribute : public Variable
1875{
1876 using UniquePtr = std::unique_ptr<Attribute>;
1877
1878 /// @brief Construct a new Attribute with a given name and type. Optionally
1879 /// also mark it as inferred type creation (no type was directly
1880 /// specified)
1881 /// @param name The name of the attribute
1882 /// @param type The type of the attribute
1883 /// @param inferred Whether the provided type was directly specified
1884 /// (false).
1885 Attribute(const std::string& name, const tokens::CoreType type,
1886 const bool inferred = false)
1887 : Variable(name)
1888 , mType(type)
1889 , mTypeInferred(inferred) {}
1890 /// @brief Construct a new Attribute with a given name and type/token
1891 /// string, delegating construction to the above Attribute
1892 /// constructor.
1893 /// @param name The name of the attribute
1894 /// @param token The type/token string of the attribute
1895 /// @param inferred Whether the provided type was directly specified
1896 /// (false).
1897 Attribute(const std::string& name, const std::string& token,
1898 const bool inferred = false)
1899 : Attribute(name, tokens::tokenFromTypeString(token), inferred) {}
1900 /// @brief Deep copy constructor for a Attribute
1901 /// @note No parent information needs updating as an Attribute is a
1902 /// "leaf level" node (contains no children)
1903 /// @param other A const reference to another Attribute to deep copy
1904 Attribute(const Attribute& other)
1905 : Variable(other)
1906 , mType(other.mType)
1907 , mTypeInferred(other.mTypeInferred) {}
1908 ~Attribute() override = default;
1909
1910 /// @copybrief Node::copy()
1911 Attribute* copy() const override final { return new Attribute(*this); }
1912 /// @copybrief Node::nodetype()
1913 NodeType nodetype() const override { return Node::AttributeNode; }
1914 /// @copybrief Node::nodename()
1915 const char* nodename() const override { return "attribute"; }
1916 /// @copybrief Node::subname()
1917 const char* subname() const override { return "atr"; }
1918 /// @copybrief Node::basetype()
1919 const Variable* basetype() const override { return this; }
1920
1921 /// @brief Query whether this attribute was accessed via inferred syntax
1922 /// i.e. \@P or \@myattribute
1923 /// @return True if inferred syntax was used
1924 inline bool inferred() const { return mTypeInferred; }
1925 /// @brief Access the type that was used to access this attribute
1926 /// @return The type used to access this attribute as a tokens::CoreType
1927 inline tokens::CoreType type() const { return mType; }
1928 /// @brief Get the access type as a front end AX type/token string
1929 /// @note This returns the associated token to the type, not necessarily
1930 /// equal to the OpenVDB type string
1931 /// @return A string representing the type/token
1932 inline std::string typestr() const {
1933 return ast::tokens::typeStringFromToken(mType);
1934 }
1935 /// @brief Construct and return the full attribute token identifier. See
1936 /// Attribute::tokenFromNameType
1937 /// @return A string representing the attribute token.
1938 inline std::string tokenname() const {
1939 return Attribute::tokenFromNameType(this->name(), this->type());
1940 }
1941
1942 /// @brief Static method returning the symbol associated with an Attribute
1943 /// access as defined by AX Grammar
1944 /// @return The '@' character as a char
1945 static inline char symbolseparator() { return '@'; }
1946 /// @brief Static method returning the full unique attribute token
1947 /// identifier by consolidating its name and type such that
1948 /// token = tokenstr + '\@' + name, where tokenstr is the AX type
1949 /// token as a string, converted from the provided CoreType.
1950 /// @note This identifier is unique for accesses to the same attribute
1951 /// @note Due to inferred and single character accesses in AX, this return
1952 /// value does not necessarily represent the original syntax used to
1953 /// access this attribute. For example, \@myattrib will be stored
1954 /// and returned as float\@myattrib.
1955 /// @param name The name of the attribute
1956 /// @param type The CoreType of the attribute
1957 /// @return A string representing the attribute token.
1958 static inline std::string
1959 tokenFromNameType(const std::string& name, const tokens::CoreType type) {
1960 return ast::tokens::typeStringFromToken(type) +
1961 Attribute::symbolseparator() + name;
1962 }
1963 /// @brief Static method which splits a valid attribute token into its name
1964 /// and type counterparts. If the token cannot be split, neither
1965 /// name or type are updated and false is returned.
1966 /// @param token The token to split.
1967 /// @param name Set to the second part of the attribute token,
1968 /// representing the name. If a nullptr, it is ignored
1969 /// @param type Set to the first part of the attribute token,
1970 /// representing the type. If a nullptr, it is ignored. Note
1971 /// that this can be empty if the attribute token has an
1972 /// inferred type or a single character.
1973 /// @return True if the provided attribute token could be split
1974 static inline bool
1975 nametypeFromToken(const std::string& token, std::string* name, std::string* type) {
1976 const size_t at = token.find(symbolseparator());
1977 if (at == std::string::npos) return false;
1978 if (type) {
1979 *type = token.substr(0, at);
1980 if (type->empty()) {
1981 *type = ast::tokens::typeStringFromToken(tokens::CoreType::FLOAT);
1982 }
1983 }
1984 if (name) *name = token.substr(at + 1, token.size());
1985 return true;
1986 }
1987 private:
1988 const tokens::CoreType mType;
1989 const bool mTypeInferred;
1990};
1991
1992/// @brief ExternalVariable represent any access to external (custom) data,
1993/// typically associated with the '$' symbol syntax. Note that the AST
1994/// does not store any additional information on the given external
1995/// other than its name and type, which together form a unique external
1996/// identifier known as the ExternalVariable 'token'. This token is used
1997/// by the compiler to map user provided values to these external
1998/// values.
1999/// @note The Attribute AST node works in a similar way
2000/// @note An ExternalVariable is a complete "leaf-level" AST node. It has no
2001/// children and nothing derives from it.
2002 struct ExternalVariable : public Variable
2003{
2004 using UniquePtr = std::unique_ptr<ExternalVariable>;
2005
2006 /// @brief Construct a new ExternalVariable with a given name and type
2007 /// @param name The name of the attribute
2008 /// @param type The type of the attribute
2009 ExternalVariable(const std::string& name, const tokens::CoreType type)
2010 : Variable(name)
2011 , mType(type) {}
2012 /// @brief Construct a new ExternalVariable with a given name and type/token
2013 /// string, delegating construction to the above ExternalVariable
2014 /// constructor.
2015 /// @param name The name of the attribute
2016 /// @param token The type/token string of the attribute
2017 ExternalVariable(const std::string& name, const std::string& token)
2018 : ExternalVariable(name, tokens::tokenFromTypeString(token)) {}
2019 /// @brief Deep copy constructor for a ExternalVariable
2020 /// @note No parent information needs updating as an ExternalVariable is a
2021 /// "leaf level" node (contains no children)
2022 /// @param other A const reference to another ExternalVariable to deep
2023 /// copy
2024 ExternalVariable(const ExternalVariable& other)
2025 : Variable(other)
2026 , mType(other.mType) {}
2027 ~ExternalVariable() override = default;
2028
2029 /// @copybrief Node::copy()
2030 ExternalVariable* copy() const override final {
2031 return new ExternalVariable(*this);
2032 }
2033 /// @copybrief Node::nodetype()
2034 NodeType nodetype() const override { return Node::ExternalVariableNode; }
2035 /// @copybrief Node::nodename()
2036 const char* nodename() const override { return "external"; }
2037 /// @copybrief Node::subname()
2038 const char* subname() const override { return "ext"; }
2039 /// @copybrief Node::basetype()
2040 const Variable* basetype() const override { return this; }
2041
2042 /// @brief Access the type that was used to access this external variable
2043 /// @return The type used to access this external as a tokens::CoreType
2044 inline tokens::CoreType type() const { return mType; }
2045 /// @brief Get the access type as a front end AX type/token string
2046 /// @note This returns the associated token to the type, not necessarily
2047 /// equal to the OpenVDB type string
2048 /// @return A string representing the type/token
2049 inline std::string typestr() const {
2050 return ast::tokens::typeStringFromToken(mType);
2051 }
2052 /// @brief Construct and return the full external token identifier. See
2053 /// ExternalVariable::tokenFromNameType
2054 /// @return A string representing the external variable token.
2055 inline const std::string tokenname() const {
2056 return ExternalVariable::tokenFromNameType(this->name(), this->type());
2057 }
2058
2059 /// @brief Static method returning the symbol associated with an
2060 /// ExternalVariable access as defined by AX Grammar
2061 /// @return The '$' character as a char
2062 static inline char symbolseparator() { return '$'; }
2063 /// @brief Static method returning the full unique external token
2064 /// identifier by consolidating its name and type such that
2065 /// token = tokenstr + '$' + name, where tokenstr is the AX type
2066 /// token as a string, converted from the provided CoreType.
2067 /// @note This identifier is unique for accesses to the same external
2068 /// @note Due to inferred and single character accesses in AX, this return
2069 /// value does not necessarily represent the original syntax used to
2070 /// access this external. For example, v$data will be stored and
2071 /// returned as vec3f$data.
2072 /// @param name The name of the external
2073 /// @param type The CoreType of the external
2074 /// @return A string representing the external token.
2075 static inline std::string
2076 tokenFromNameType(const std::string& name, const tokens::CoreType type) {
2077 return ast::tokens::typeStringFromToken(type) +
2078 ExternalVariable::symbolseparator() + name;
2079 }
2080 /// @brief Static method which splits a valid external token into its name
2081 /// and type counterparts. If the token cannot be split, neither
2082 /// name or type are updated and false is returned.
2083 /// @param token The token to split.
2084 /// @param name Set to the second part of the external token,
2085 /// representing the name. If a nullptr, it is ignored
2086 /// @param type Set to the first part of the external token,
2087 /// representing the type. If a nullptr, it is ignored. Note
2088 /// that this can be empty if the external token has an
2089 /// inferred type or a single character.
2090 /// @return True if the provided external token could be split
2091 static inline bool
2092 nametypeFromToken(const std::string& token, std::string* name, std::string* type) {
2093 const size_t at = token.find(symbolseparator());
2094 if (at == std::string::npos) return false;
2095 if (type) {
2096 *type = token.substr(0, at);
2097 if (type->empty()) {
2098 *type = ast::tokens::typeStringFromToken(tokens::CoreType::FLOAT);
2099 }
2100 }
2101 if (name) *name = token.substr(at + 1, token.size());
2102 return true;
2103 }
2104 private:
2105 const tokens::CoreType mType;
2106};
2107
2108/// @brief Local AST nodes represent a single accesses to a local variable.
2109/// The only store the name of the variable being accessed.
2110/// @note A Local is a complete "leaf-level" AST node. It has no children and
2111/// nothing derives from it.
2112 struct Local : public Variable
2113{
2114 using UniquePtr = std::unique_ptr<Local>;
2115
2116 /// @brief Construct a Local with a given name
2117 /// @param name The name of the local variable being accessed
2118 Local(const std::string& name)
2119 : Variable(name) {}
2120 ~Local() override = default;
2121
2122 /// @copybrief Node::copy()
2123 Local* copy() const override final { return new Local(*this); }
2124 /// @copybrief Node::nodetype()
2125 NodeType nodetype() const override { return Node::LocalNode; }
2126 /// @copybrief Node::nodename()
2127 const char* nodename() const override { return "local"; }
2128 /// @copybrief Node::subname()
2129 const char* subname() const override { return "lcl"; }
2130 /// @copybrief Node::basetype()
2131 const Variable* basetype() const override { return this; }
2132};
2133
2134/// @brief DeclareLocal AST nodes symbolize a single type declaration of a
2135/// local variable. These store the local variables that They also however store its
2136/// specified type. These have the important distinction of representing
2137/// the initial creation and allocation of a variable, in comparison to
2138/// a Local node which only represents access.
2139 struct DeclareLocal : public Statement
2140{
2141 using UniquePtr = std::unique_ptr<DeclareLocal>;
2142
2143 /// @brief Construct a new DeclareLocal with a given name and type
2144 /// @param type The type of the declaration
2145 /// @param local The local variable being declared
2146 /// @param init The initialiser expression of the local
2147 DeclareLocal(const tokens::CoreType type, Local* local, Expression* init = nullptr)
2148 : mType(type)
2149 , mLocal(local)
2150 , mInit(init) {
2151 OPENVDB_ASSERT(mLocal);
2152 mLocal->setParent(this);
2153 if (mInit) mInit->setParent(this);
2154 }
2155 /// @brief Deep copy constructor for a DeclareLocal
2156 /// @note No parent information needs updating as an DeclareLocal is a
2157 /// "leaf level" node (contains no children)
2158 /// @param other A const reference to another DeclareLocal to deep copy
2159 DeclareLocal(const DeclareLocal& other)
2160 : mType(other.mType)
2161 , mLocal(other.mLocal->copy())
2162 , mInit(other.hasInit() ? other.mInit->copy() : nullptr) {
2163 mLocal->setParent(this);
2164 if (mInit) mInit->setParent(this);
2165 }
2166 ~DeclareLocal() override = default;
2167
2168 /// @copybrief Node::copy()
2169 DeclareLocal* copy() const override final { return new DeclareLocal(*this); }
2170 /// @copybrief Node::nodetype()
2171 NodeType nodetype() const override { return Node::DeclareLocalNode; }
2172 /// @copybrief Node::nodename()
2173 const char* nodename() const override { return "declaration"; }
2174 /// @copybrief Node::subname()
2175 const char* subname() const override { return "dcl"; }
2176 /// @copybrief Node::basetype()
2177 const Statement* basetype() const override { return this; }
2178 /// @copybrief Node::children()
2179 size_t children() const override final { return 2; }
2180 /// @copybrief Node::child()
2181 const Expression* child(const size_t i) const override final {
2182 if (i == 0) return this->local();
2183 if (i == 1) return this->init();
2184 return nullptr;
2185 }
2186 /// @copybrief Node::replacechild()
2187 inline bool replacechild(const size_t i, Node* node) override final {
2188 if (i > 1) return false;
2189 if (i == 0) {
2190 Local* local = dynamic_cast<Local*>(node);
2191 if (!local) return false;
2192 mLocal.reset(local);
2193 mLocal->setParent(this);
2194 }
2195 else {
2196 Expression* init = dynamic_cast<Expression*>(node);
2197 if (!init) return false;
2198 mInit.reset(init);
2199 mInit->setParent(this);
2200 }
2201 return true;
2202 }
2203
2204 /// @brief Access the type that was specified at which to create the given
2205 /// local
2206 /// @return The declaration type
2207 inline tokens::CoreType type() const { return mType; }
2208 /// @brief Get the declaration type as a front end AX type/token string
2209 /// @note This returns the associated token to the type, not necessarily
2210 /// equal to the OpenVDB type string
2211 /// @return A string representing the type/token
2212 inline std::string typestr() const {
2213 return ast::tokens::typeStringFromToken(mType);
2214 }
2215 /// @brief Query if this declaration has an initialiser
2216 /// @return True if an initialiser exists, false otherwise
2217 inline bool hasInit() const { return static_cast<bool>(this->init()); }
2218
2219 /// @brief Access a const pointer to the Local
2220 /// @return A const pointer to the local
2221 const Local* local() const { return mLocal.get(); }
2222 /// @brief Access a const pointer to the initialiser
2223 /// @return A const pointer to the initialiser
2224 const Expression* init() const { return mInit.get(); }
2225
2226 private:
2227 const tokens::CoreType mType;
2228 Local::UniquePtr mLocal; // could be Variable for attribute declaration
2229 Expression::UniquePtr mInit;
2230};
2231
2232
2233/// @brief A Value (literal) AST node holds either literal text or absolute
2234/// value information on all numerical, string and boolean constants.
2235/// A single instance of a Value is templated on the requested scalar,
2236/// boolean or string type. If scalar or boolean value is constructed
2237/// from a string (as typically is the case in the parser), the value is
2238/// automatically converted to its numerical representation. If this
2239/// fails, the original text is stored instead.
2240/// @note All numerical values are stored as their highest possible precision
2241/// type to support overflowing without storing the original string
2242/// data. The original string data is only required if the value is too
2243/// large to be stored in these highest precision types (usually a
2244/// uint64_t for scalars or double for floating points).
2245/// @note Numerical values are guaranteed to be positive (if constructed from
2246/// the AX parser). Negative values are represented by a combination of
2247/// a UnaryOperator holding a Value AST node.
2248/// @note Note that Value AST nodes representing strings are specialized and
2249/// are guranteed to be "well-formed" (there is no numerical conversion)
2250/// @note A Value is a complete "leaf-level" AST node. It has no children and
2251/// nothing derives from it.
2252 template <typename T>
2253 struct Value : public ValueBase
2254{
2255 using UniquePtr = std::unique_ptr<Value<T>>;
2256
2257 using Type = T;
2258 /// @brief Integers and Floats store their value as ContainerType, which is
2259 /// guaranteed to be at least large enough to represent the maximum
2260 /// possible supported type for the requested precision.
2261 using ContainerType = typename std::conditional<
2262 std::is_integral<T>::value, uint64_t, T>::type;
2263
2264 /// @brief The list of supported numerical constants.
2265 /// @note Strings are specialized and handled separately
2266 static constexpr bool IsSupported =
2267 std::is_same<T, bool>::value ||
2268 std::is_same<T, int16_t>::value ||
2269 std::is_same<T, int32_t>::value ||
2270 std::is_same<T, int64_t>::value ||
2271 std::is_same<T, float>::value ||
2272 std::is_same<T, double>::value;
2273 static_assert(IsSupported, "Incompatible ast::Value node instantiated.");
2274
2275 /// @brief Directly construct a Value from a source integer, float or
2276 /// boolean, guaranteeing valid construction. Note that the provided
2277 /// argument should not be negative
2278 Value(const ContainerType value)
2279 : mValue(value) {}
2280 /// @brief Deep copy constructor for a Value
2281 /// @note No parent information needs updating as a Value is a "leaf
2282 /// level" node (contains no children)
2283 /// @param other A const reference to another Value to deep copy
2284 Value(const Value<T>& other)
2285 : mValue(other.mValue) {}
2286 ~Value() override = default;
2287
2288 /// @copybrief Node::copy()
2289 Value<Type>* copy() const override final { return new Value<Type>(*this); }
2290 /// @copybrief Node::nodetype()
2291 NodeType nodetype() const override {
2292 if (std::is_same<T, bool>::value) return Node::ValueBoolNode;
2293 if (std::is_same<T, int16_t>::value) return Node::ValueInt16Node;
2294 if (std::is_same<T, int32_t>::value) return Node::ValueInt32Node;
2295 if (std::is_same<T, int64_t>::value) return Node::ValueInt64Node;
2296 if (std::is_same<T, float>::value) return Node::ValueFloatNode;
2297 if (std::is_same<T, double>::value) return Node::ValueDoubleNode;
2298 }
2299 /// @copybrief Node::nodename()
2300 const char* nodename() const override {
2301 if (std::is_same<T, bool>::value) return "boolean literal";
2302 if (std::is_same<T, int16_t>::value) return "int16 literal";
2303 if (std::is_same<T, int32_t>::value) return "int32 literal";
2304 if (std::is_same<T, int64_t>::value) return "int64 literal";
2305 if (std::is_same<T, float>::value) return "float (32bit) literal";
2306 if (std::is_same<T, double>::value) return "double (64bit) literal";
2307 }
2308 /// @copybrief Node::subname()
2309 const char* subname() const override {
2310 if (std::is_same<T, bool>::value) return "bool";
2311 if (std::is_same<T, int16_t>::value) return "i16";
2312 if (std::is_same<T, int32_t>::value) return "i32";
2313 if (std::is_same<T, int64_t>::value) return "i64";
2314 if (std::is_same<T, float>::value) return "flt";
2315 if (std::is_same<T, double>::value) return "dbl";
2316 }
2317 /// @copybrief Node::basetype()
2318 const ValueBase* basetype() const override { return this; }
2319
2320 /// @brief Access the value as its stored type
2321 /// @return The value as its stored ContainerType
2322 inline ContainerType asContainerType() const { return mValue; }
2323 /// @brief Access the value as its requested (templated) type
2324 /// @return The value as its templed type T
2325 inline T value() const { return static_cast<T>(mValue); }
2326
2327 private:
2328 // A container of a max size defined by LiteralValueContainer to hold values
2329 // which may be out of scope. This is only used for warnings
2330 const ContainerType mValue;
2331};
2332
2333/// @brief Specialization of Values for strings
2334 template <>
2335 struct Value<std::string> : public ValueBase
2336{
2337 using UniquePtr = std::unique_ptr<Value<std::string>>;
2338
2339 using Type = std::string;
2340 /// @brief Construct a new Value string from a string
2341 /// @param value The string to copy onto this Value
2342 Value(const Type& value) : mValue(value) {}
2343 /// @brief Deep copy constructor for a Value string
2344 /// @note No parent information needs updating as a Value is a "leaf
2345 /// level" node (contains no children)
2346 /// @param other A const reference to another Value string to deep copy
2347 Value(const Value<Type>& other) : mValue(other.mValue) {}
2348 ~Value() override = default;
2349
2350 Value<Type>* copy() const override final { return new Value<Type>(*this); }
2351 NodeType nodetype() const override { return Node::ValueStrNode; }
2352 const char* nodename() const override { return "string value"; }
2353 const char* subname() const override { return "str"; }
2354 const ValueBase* basetype() const override { return this; }
2355
2356 /// @brief Access the string
2357 /// @return A const reference to the string
2358 inline const std::string& value() const { return mValue; }
2359 private:
2360 const Type mValue;
2361};
2362
2363} // namespace ast
2364} // namespace ax
2365
2366} // namespace OPENVDB_VERSION_NAME
2367} // namespace openvdb
2368
2369#endif // OPENVDB_AX_AST_HAS_BEEN_INCLUDED
2370
Assert.h
OPENVDB_ASSERT
#define OPENVDB_ASSERT(X)
Definition Assert.h:41
Tokens.h
Various function and operator tokens used throughout the AST and code generation.
openvdb::v12_1::ax::ast::tokens
Definition Tokens.h:29
openvdb::v12_1::ax::ast::tokens::OperatorToken
OperatorToken
Definition Tokens.h:151
openvdb::v12_1::ax::ast::tokens::EQUALS
@ EQUALS
ASSIGNMENT.
Definition Tokens.h:187
openvdb::v12_1::ax::ast::tokens::typeStringFromToken
std::string typeStringFromToken(const CoreType type)
Definition Tokens.h:118
openvdb::v12_1::ax::ast::tokens::KeywordToken
KeywordToken
Definition Tokens.h:315
openvdb::v12_1::ax::ast::tokens::LoopToken
LoopToken
Definition Tokens.h:297
openvdb::v12_1::ax::ast::tokens::FOR
@ FOR
Definition Tokens.h:298
openvdb::v12_1::ax::ast::tokens::CoreType
CoreType
Definition Tokens.h:32
openvdb::v12_1::ax::ast::tokens::FLOAT
@ FLOAT
Definition Tokens.h:38
openvdb::v12_1::ax::ast
Definition AST.h:44
openvdb::v12_1::string
Definition Name.h:40
openvdb
Definition Exceptions.h:13
std
Definition Coord.h:590
openvdb::v12_1::ax::ast::ArrayPack::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1824
openvdb::v12_1::ax::ast::ArrayPack::~ArrayPack
~ArrayPack() override=default
openvdb::v12_1::ax::ast::ArrayPack::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1826
openvdb::v12_1::ax::ast::ArrayPack::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1834
openvdb::v12_1::ax::ast::ArrayPack::UniquePtr
std::unique_ptr< ArrayPack > UniquePtr
Definition AST.h:1787
openvdb::v12_1::ax::ast::ArrayPack::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1832
openvdb::v12_1::ax::ast::ArrayPack::size
size_t size() const
Alias for ArrayPack::children.
Definition AST.h:1848
openvdb::v12_1::ax::ast::ArrayPack::ArrayPack
ArrayPack(const std::vector< Expression * > &arguments)
Construct a new ArrayPack transferring ownership of any provided arguments to the ArrayPack and updat...
Definition AST.h:1802
openvdb::v12_1::ax::ast::ArrayPack::copy
ArrayPack * copy() const override final
The deep copy method for a Node.
Definition AST.h:1822
openvdb::v12_1::ax::ast::ArrayPack::append
void append(Expression *expr)
Appends an argument to this ArrayPack, transferring ownership to the ArrayPack and updating parent da...
Definition AST.h:1855
openvdb::v12_1::ax::ast::ArrayPack::empty
bool empty() const
Query whether this Expression list holds any valid expressions.
Definition AST.h:1851
openvdb::v12_1::ax::ast::ArrayPack::ArrayPack
ArrayPack(const ArrayPack &other)
Deep copy constructor for a ArrayPack, performing a deep copy on all held arguments,...
Definition AST.h:1812
openvdb::v12_1::ax::ast::ArrayPack::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1830
openvdb::v12_1::ax::ast::ArrayPack::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1839
openvdb::v12_1::ax::ast::ArrayPack::ArrayPack
ArrayPack(Expression *expression)
Construct a new ArrayPack with a single expression, transferring ownership of the expression to the A...
Definition AST.h:1794
openvdb::v12_1::ax::ast::ArrayPack::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1828
openvdb::v12_1::ax::ast::ArrayUnpack::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1725
openvdb::v12_1::ax::ast::ArrayUnpack::ArrayUnpack
ArrayUnpack(const ArrayUnpack &other)
Deep copy constructor for a ArrayUnpack, performing a deep copy on the expression being indexed and a...
Definition AST.h:1715
openvdb::v12_1::ax::ast::ArrayUnpack::copy
ArrayUnpack * copy() const override final
The deep copy method for a Node.
Definition AST.h:1723
openvdb::v12_1::ax::ast::ArrayUnpack::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1727
openvdb::v12_1::ax::ast::ArrayUnpack::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1733
openvdb::v12_1::ax::ast::ArrayUnpack::child
const Statement * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1735
openvdb::v12_1::ax::ast::ArrayUnpack::UniquePtr
std::unique_ptr< ArrayUnpack > UniquePtr
Definition AST.h:1688
openvdb::v12_1::ax::ast::ArrayUnpack::expression
const Expression * expression() const
Access a const pointer to the expression being indexed as an abstract Expression.
Definition AST.h:1765
openvdb::v12_1::ax::ast::ArrayUnpack::isMatrixIndex
bool isMatrixIndex() const
Query whether this ArrayUnpack operation must be a matrix indexing operation by checking the presence...
Definition AST.h:1774
openvdb::v12_1::ax::ast::ArrayUnpack::~ArrayUnpack
~ArrayUnpack() override=default
openvdb::v12_1::ax::ast::ArrayUnpack::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1731
openvdb::v12_1::ax::ast::ArrayUnpack::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1742
openvdb::v12_1::ax::ast::ArrayUnpack::component1
const Expression * component1() const
Access a const pointer to the second component being used as an abstract Expression.
Definition AST.h:1761
openvdb::v12_1::ax::ast::ArrayUnpack::component0
const Expression * component0() const
Access a const pointer to the first component being used as an abstract Expression.
Definition AST.h:1756
openvdb::v12_1::ax::ast::ArrayUnpack::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1729
openvdb::v12_1::ax::ast::ArrayUnpack::ArrayUnpack
ArrayUnpack(Expression *expr, Expression *component0, Expression *component1=nullptr)
Construct a new ArrayUnpack with a valid expression, an initial component (as an expression) to the f...
Definition AST.h:1699
openvdb::v12_1::ax::ast::AssignExpression::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1237
openvdb::v12_1::ax::ast::AssignExpression::copy
AssignExpression * copy() const override final
The deep copy method for a Node.
Definition AST.h:1233
openvdb::v12_1::ax::ast::AssignExpression::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1239
openvdb::v12_1::ax::ast::AssignExpression::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1247
openvdb::v12_1::ax::ast::AssignExpression::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1245
openvdb::v12_1::ax::ast::AssignExpression::~AssignExpression
~AssignExpression() override=default
openvdb::v12_1::ax::ast::AssignExpression::lhs
const Expression * lhs() const
Access a const pointer to the AssignExpression LHS as an abstract expression.
Definition AST.h:1280
openvdb::v12_1::ax::ast::AssignExpression::operation
tokens::OperatorToken operation() const
Query the actual operational type of this AssignExpression. For simple (non-compound) AssignExpressio...
Definition AST.h:1276
openvdb::v12_1::ax::ast::AssignExpression::rhs
const Expression * rhs() const
Access a const pointer to the AssignExpression RHS as an.
Definition AST.h:1284
openvdb::v12_1::ax::ast::AssignExpression::UniquePtr
std::unique_ptr< AssignExpression > UniquePtr
Definition AST.h:1200
openvdb::v12_1::ax::ast::AssignExpression::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1243
openvdb::v12_1::ax::ast::AssignExpression::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1253
openvdb::v12_1::ax::ast::AssignExpression::isCompound
bool isCompound() const
Query whether or not this is a compound AssignExpression. Compound AssignExpressions are assignments ...
Definition AST.h:1272
openvdb::v12_1::ax::ast::AssignExpression::AssignExpression
AssignExpression(const AssignExpression &other)
Deep copy constructor for an AssignExpression, performing a deep copy on both held expressions,...
Definition AST.h:1223
openvdb::v12_1::ax::ast::AssignExpression::AssignExpression
AssignExpression(Expression *lhs, Expression *rhs, const tokens::OperatorToken op=tokens::EQUALS)
Construct a new AssignExpression with valid LHS and RHS expressions, transferring ownership of the ex...
Definition AST.h:1208
openvdb::v12_1::ax::ast::AssignExpression::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1241
openvdb::v12_1::ax::ast::Attribute::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1913
openvdb::v12_1::ax::ast::Attribute::inferred
bool inferred() const
Query whether this attribute was accessed via inferred syntax i.e. @P or @myattribute.
Definition AST.h:1924
openvdb::v12_1::ax::ast::Attribute::symbolseparator
static char symbolseparator()
Static method returning the symbol associated with an Attribute access as defined by AX Grammar.
Definition AST.h:1945
openvdb::v12_1::ax::ast::Attribute::Attribute
Attribute(const std::string &name, const std::string &token, const bool inferred=false)
Construct a new Attribute with a given name and type/token string, delegating construction to the abo...
Definition AST.h:1897
openvdb::v12_1::ax::ast::Attribute::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1915
openvdb::v12_1::ax::ast::Attribute::UniquePtr
std::unique_ptr< Attribute > UniquePtr
Definition AST.h:1876
openvdb::v12_1::ax::ast::Attribute::Attribute
Attribute(const std::string &name, const tokens::CoreType type, const bool inferred=false)
Construct a new Attribute with a given name and type. Optionally also mark it as inferred type creati...
Definition AST.h:1885
openvdb::v12_1::ax::ast::Attribute::basetype
const Variable * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1919
openvdb::v12_1::ax::ast::Attribute::tokenFromNameType
static std::string tokenFromNameType(const std::string &name, const tokens::CoreType type)
Static method returning the full unique attribute token identifier by consolidating its name and type...
Definition AST.h:1959
openvdb::v12_1::ax::ast::Attribute::nametypeFromToken
static bool nametypeFromToken(const std::string &token, std::string *name, std::string *type)
Static method which splits a valid attribute token into its name and type counterparts....
Definition AST.h:1975
openvdb::v12_1::ax::ast::Attribute::copy
Attribute * copy() const override final
The deep copy method for a Node.
Definition AST.h:1911
openvdb::v12_1::ax::ast::Attribute::tokenname
std::string tokenname() const
Construct and return the full attribute token identifier. See Attribute::tokenFromNameType.
Definition AST.h:1938
openvdb::v12_1::ax::ast::Attribute::type
tokens::CoreType type() const
Access the type that was used to access this attribute.
Definition AST.h:1927
openvdb::v12_1::ax::ast::Attribute::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1917
openvdb::v12_1::ax::ast::Attribute::~Attribute
~Attribute() override=default
openvdb::v12_1::ax::ast::Attribute::Attribute
Attribute(const Attribute &other)
Deep copy constructor for a Attribute.
Definition AST.h:1904
openvdb::v12_1::ax::ast::Attribute::typestr
std::string typestr() const
Get the access type as a front end AX type/token string.
Definition AST.h:1932
openvdb::v12_1::ax::ast::BinaryOperator::BinaryOperator
BinaryOperator(Expression *left, Expression *right, const tokens::OperatorToken op)
Construct a new BinaryOperator with a given tokens::OperatorToken and a valid LHS and RHS expression,...
Definition AST.h:1000
openvdb::v12_1::ax::ast::BinaryOperator::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1038
openvdb::v12_1::ax::ast::BinaryOperator::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1040
openvdb::v12_1::ax::ast::BinaryOperator::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1048
openvdb::v12_1::ax::ast::BinaryOperator::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1046
openvdb::v12_1::ax::ast::BinaryOperator::lhs
const Expression * lhs() const
Access a const pointer to the BinaryOperator LHS as an abstract expression.
Definition AST.h:1075
openvdb::v12_1::ax::ast::BinaryOperator::operation
tokens::OperatorToken operation() const
Query the type of binary operation held on this node.
Definition AST.h:1071
openvdb::v12_1::ax::ast::BinaryOperator::rhs
const Expression * rhs() const
Access a const pointer to the BinaryOperator RHS as an abstract expression.
Definition AST.h:1079
openvdb::v12_1::ax::ast::BinaryOperator::copy
BinaryOperator * copy() const override final
The deep copy method for a Node.
Definition AST.h:1034
openvdb::v12_1::ax::ast::BinaryOperator::UniquePtr
std::unique_ptr< BinaryOperator > UniquePtr
Definition AST.h:990
openvdb::v12_1::ax::ast::BinaryOperator::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1044
openvdb::v12_1::ax::ast::BinaryOperator::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1054
openvdb::v12_1::ax::ast::BinaryOperator::BinaryOperator
BinaryOperator(const BinaryOperator &other)
Deep copy constructor for a BinaryOperator, performing a deep copy on both held expressions,...
Definition AST.h:1024
openvdb::v12_1::ax::ast::BinaryOperator::~BinaryOperator
~BinaryOperator() override=default
openvdb::v12_1::ax::ast::BinaryOperator::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1042
openvdb::v12_1::ax::ast::BinaryOperator::BinaryOperator
BinaryOperator(Expression *left, Expression *right, const std::string &op)
Construct a new BinaryOperator with a string, delegating construction to the above BinaryOperator con...
Definition AST.h:1016
openvdb::v12_1::ax::ast::Block
A Block node represents a scoped list of statements. It may comprise of 0 or more statements,...
Definition AST.h:477
openvdb::v12_1::ax::ast::Block::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:515
openvdb::v12_1::ax::ast::Block::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:517
openvdb::v12_1::ax::ast::Block::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:524
openvdb::v12_1::ax::ast::Block::size
size_t size() const
Alias for Block::children.
Definition AST.h:541
openvdb::v12_1::ax::ast::Block::Block
Block()
Construct a new Block with an empty list.
Definition AST.h:481
openvdb::v12_1::ax::ast::Block::basetype
const Statement * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:521
openvdb::v12_1::ax::ast::Block::child
const Statement * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:526
openvdb::v12_1::ax::ast::Block::Block
Block(const Block &other)
Deep copy constructor for a Block, performing a deep copy on every held statement,...
Definition AST.h:505
openvdb::v12_1::ax::ast::Block::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:531
openvdb::v12_1::ax::ast::Block::Block
Block(Statement *statement)
Construct a new Block with a single statement, transferring ownership of the statement to the block a...
Definition AST.h:487
openvdb::v12_1::ax::ast::Block::addStatement
void addStatement(Statement *stmnt)
Adds a statement to this block, transferring ownership to the block and updating parent data on the s...
Definition AST.h:545
openvdb::v12_1::ax::ast::Block::copy
Block * copy() const override final
The deep copy method for a Node.
Definition AST.h:513
openvdb::v12_1::ax::ast::Block::UniquePtr
std::unique_ptr< Block > UniquePtr
Definition AST.h:478
openvdb::v12_1::ax::ast::Block::Block
Block(const std::vector< Statement * > &statements)
Construct a new Block from a vector of statements, transferring ownership of all valid statements to ...
Definition AST.h:496
openvdb::v12_1::ax::ast::Block::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:519
openvdb::v12_1::ax::ast::Block::~Block
~Block() override=default
openvdb::v12_1::ax::ast::Cast::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1495
openvdb::v12_1::ax::ast::Cast::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1497
openvdb::v12_1::ax::ast::Cast::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1505
openvdb::v12_1::ax::ast::Cast::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1503
openvdb::v12_1::ax::ast::Cast::Cast
Cast(const Cast &other)
Deep copy constructor for a Cast node, performing a deep copy on the underlying expressions,...
Definition AST.h:1484
openvdb::v12_1::ax::ast::Cast::expression
const Expression * expression() const
Access a const pointer to the Cast node's expression as an abstract expression.
Definition AST.h:1532
openvdb::v12_1::ax::ast::Cast::Cast
Cast(Expression *expr, const tokens::CoreType type)
Construct a new Cast with a valid expression and a target tokens::CoreType, transferring ownership of...
Definition AST.h:1473
openvdb::v12_1::ax::ast::Cast::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1501
openvdb::v12_1::ax::ast::Cast::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1510
openvdb::v12_1::ax::ast::Cast::copy
Cast * copy() const override final
The deep copy method for a Node.
Definition AST.h:1493
openvdb::v12_1::ax::ast::Cast::UniquePtr
std::unique_ptr< Cast > UniquePtr
Definition AST.h:1466
openvdb::v12_1::ax::ast::Cast::type
tokens::CoreType type() const
Access to the target type.
Definition AST.h:1521
openvdb::v12_1::ax::ast::Cast::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1499
openvdb::v12_1::ax::ast::Cast::~Cast
~Cast() override=default
openvdb::v12_1::ax::ast::Cast::typestr
std::string typestr() const
Get the target type as a front end AX type/token string.
Definition AST.h:1526
openvdb::v12_1::ax::ast::CommaOperator::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:652
openvdb::v12_1::ax::ast::CommaOperator::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:654
openvdb::v12_1::ax::ast::CommaOperator::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:663
openvdb::v12_1::ax::ast::CommaOperator::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:661
openvdb::v12_1::ax::ast::CommaOperator::size
size_t size() const
Alias for CommaOperator::children.
Definition AST.h:677
openvdb::v12_1::ax::ast::CommaOperator::UniquePtr
std::unique_ptr< CommaOperator > UniquePtr
Definition AST.h:609
openvdb::v12_1::ax::ast::CommaOperator::append
void append(Expression *expr)
Append an expression to this CommaOperator, transferring ownership to the CommaOperator and updating ...
Definition AST.h:684
openvdb::v12_1::ax::ast::CommaOperator::CommaOperator
CommaOperator(const CommaOperator &other)
Deep copy constructor for an CommaOperator, performing a deep copy on every held expression,...
Definition AST.h:638
openvdb::v12_1::ax::ast::CommaOperator::empty
bool empty() const
Query whether this Expression list holds any valid expressions.
Definition AST.h:680
openvdb::v12_1::ax::ast::CommaOperator::CommaOperator
CommaOperator(Expression *expression)
Construct a new CommaOperator with a single expression, transferring ownership of the expression to t...
Definition AST.h:618
openvdb::v12_1::ax::ast::CommaOperator::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:658
openvdb::v12_1::ax::ast::CommaOperator::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:668
openvdb::v12_1::ax::ast::CommaOperator::~CommaOperator
~CommaOperator() override=default
openvdb::v12_1::ax::ast::CommaOperator::CommaOperator
CommaOperator()
Construct a new CommaOperator with an expr set.
Definition AST.h:612
openvdb::v12_1::ax::ast::CommaOperator::CommaOperator
CommaOperator(const std::vector< Expression * > &expressions)
Construct a new CommaOperator from a vector of expression, transferring ownership of all valid expres...
Definition AST.h:627
openvdb::v12_1::ax::ast::CommaOperator::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:656
openvdb::v12_1::ax::ast::CommaOperator::copy
CommaOperator * copy() const override final
The deep copy method for a Node.
Definition AST.h:648
openvdb::v12_1::ax::ast::ConditionalStatement::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:910
openvdb::v12_1::ax::ast::ConditionalStatement::~ConditionalStatement
~ConditionalStatement() override=default
openvdb::v12_1::ax::ast::ConditionalStatement::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:912
openvdb::v12_1::ax::ast::ConditionalStatement::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:919
openvdb::v12_1::ax::ast::ConditionalStatement::hasFalse
bool hasFalse() const
Query if this ConditionalStatement has a valid 'false' branch.
Definition AST.h:955
openvdb::v12_1::ax::ast::ConditionalStatement::basetype
const Statement * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:916
openvdb::v12_1::ax::ast::ConditionalStatement::child
const Statement * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:921
openvdb::v12_1::ax::ast::ConditionalStatement::copy
ConditionalStatement * copy() const override final
The deep copy method for a Node.
Definition AST.h:906
openvdb::v12_1::ax::ast::ConditionalStatement::trueBranch
const Block * trueBranch() const
Access a const pointer to the ConditionalStatements 'true' branch as a Block.
Definition AST.h:971
openvdb::v12_1::ax::ast::ConditionalStatement::ConditionalStatement
ConditionalStatement(Expression *conditional, Block *trueBlock, Block *falseBlock=nullptr)
Construct a new ConditionalStatement with an Expression representing the primary condition,...
Definition AST.h:878
openvdb::v12_1::ax::ast::ConditionalStatement::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:928
openvdb::v12_1::ax::ast::ConditionalStatement::falseBranch
const Block * falseBranch() const
Access a const pointer to the ConditionalStatements 'false' branch as a Block.
Definition AST.h:975
openvdb::v12_1::ax::ast::ConditionalStatement::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:914
openvdb::v12_1::ax::ast::ConditionalStatement::UniquePtr
std::unique_ptr< ConditionalStatement > UniquePtr
Definition AST.h:866
openvdb::v12_1::ax::ast::ConditionalStatement::ConditionalStatement
ConditionalStatement(const ConditionalStatement &other)
Deep copy constructor for an ConditionalStatement, performing a deep copy on the condition and both h...
Definition AST.h:895
openvdb::v12_1::ax::ast::ConditionalStatement::branchCount
size_t branchCount() const
Query the number of branches held by this ConditionalStatement. This is only ever 1 or 2.
Definition AST.h:961
openvdb::v12_1::ax::ast::ConditionalStatement::condition
const Expression * condition() const
Access a const pointer to the ConditionalStatements condition as an abstract expression.
Definition AST.h:967
openvdb::v12_1::ax::ast::Crement::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1332
openvdb::v12_1::ax::ast::Crement::Crement
Crement(const Crement &other)
Deep copy constructor for a Crement, performing a deep copy on the underlying expressions,...
Definition AST.h:1321
openvdb::v12_1::ax::ast::Crement::decrement
bool decrement() const
Query if this Crement node represents an decrement –.
Definition AST.h:1367
openvdb::v12_1::ax::ast::Crement::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1334
openvdb::v12_1::ax::ast::Crement::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1343
openvdb::v12_1::ax::ast::Crement::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1341
openvdb::v12_1::ax::ast::Crement::expression
const Expression * expression() const
Access a const pointer to the expression being crements as an abstract Expression.
Definition AST.h:1377
openvdb::v12_1::ax::ast::Crement::copy
Crement * copy() const override final
The deep copy method for a Node.
Definition AST.h:1330
openvdb::v12_1::ax::ast::Crement::post
bool post() const
Query if this Crement node represents a post crement a++.
Definition AST.h:1373
openvdb::v12_1::ax::ast::Crement::Crement
Crement(Expression *expr, const Operation op, bool post)
Construct a new Crement with a valid expression, transferring ownership of the expression to the Crem...
Definition AST.h:1311
openvdb::v12_1::ax::ast::Crement::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1338
openvdb::v12_1::ax::ast::Crement::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1348
openvdb::v12_1::ax::ast::Crement::increment
bool increment() const
Query if this Crement node represents an incrementation ++.
Definition AST.h:1364
openvdb::v12_1::ax::ast::Crement::~Crement
~Crement() override=default
openvdb::v12_1::ax::ast::Crement::Operation
Operation
A simple enum representing the crement type.
Definition AST.h:1299
openvdb::v12_1::ax::ast::Crement::Increment
@ Increment
Definition AST.h:1300
openvdb::v12_1::ax::ast::Crement::Decrement
@ Decrement
Definition AST.h:1301
openvdb::v12_1::ax::ast::Crement::pre
bool pre() const
Query if this Crement node represents a pre crement ++a.
Definition AST.h:1370
openvdb::v12_1::ax::ast::Crement::operation
Operation operation() const
Query the type of the Crement operation. This does not hold post or pre-crement information.
Definition AST.h:1361
openvdb::v12_1::ax::ast::Crement::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1336
openvdb::v12_1::ax::ast::Crement::UniquePtr
std::unique_ptr< Crement > UniquePtr
Definition AST.h:1296
openvdb::v12_1::ax::ast::DeclareLocal::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:2171
openvdb::v12_1::ax::ast::DeclareLocal::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:2173
openvdb::v12_1::ax::ast::DeclareLocal::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:2181
openvdb::v12_1::ax::ast::DeclareLocal::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:2179
openvdb::v12_1::ax::ast::DeclareLocal::basetype
const Statement * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:2177
openvdb::v12_1::ax::ast::DeclareLocal::copy
DeclareLocal * copy() const override final
The deep copy method for a Node.
Definition AST.h:2169
openvdb::v12_1::ax::ast::DeclareLocal::DeclareLocal
DeclareLocal(const DeclareLocal &other)
Deep copy constructor for a DeclareLocal.
Definition AST.h:2159
openvdb::v12_1::ax::ast::DeclareLocal::local
const Local * local() const
Access a const pointer to the Local.
Definition AST.h:2221
openvdb::v12_1::ax::ast::DeclareLocal::DeclareLocal
DeclareLocal(const tokens::CoreType type, Local *local, Expression *init=nullptr)
Construct a new DeclareLocal with a given name and type.
Definition AST.h:2147
openvdb::v12_1::ax::ast::DeclareLocal::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:2187
openvdb::v12_1::ax::ast::DeclareLocal::init
const Expression * init() const
Access a const pointer to the initialiser.
Definition AST.h:2224
openvdb::v12_1::ax::ast::DeclareLocal::UniquePtr
std::unique_ptr< DeclareLocal > UniquePtr
Definition AST.h:2141
openvdb::v12_1::ax::ast::DeclareLocal::type
tokens::CoreType type() const
Access the type that was specified at which to create the given local.
Definition AST.h:2207
openvdb::v12_1::ax::ast::DeclareLocal::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:2175
openvdb::v12_1::ax::ast::DeclareLocal::~DeclareLocal
~DeclareLocal() override=default
openvdb::v12_1::ax::ast::DeclareLocal::hasInit
bool hasInit() const
Query if this declaration has an initialiser.
Definition AST.h:2217
openvdb::v12_1::ax::ast::DeclareLocal::typestr
std::string typestr() const
Get the declaration type as a front end AX type/token string.
Definition AST.h:2212
openvdb::v12_1::ax::ast::Expression
Expressions are comprised of full or potentially partial parts of a full statement that may not neces...
Definition AST.h:327
openvdb::v12_1::ax::ast::Expression::copy
virtual Expression * copy() const override=0
The deep copy method for a Node.
openvdb::v12_1::ax::ast::Expression::basetype
const Statement * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:331
openvdb::v12_1::ax::ast::Expression::~Expression
~Expression() override=default
openvdb::v12_1::ax::ast::Expression::UniquePtr
std::unique_ptr< Expression > UniquePtr
Definition AST.h:328
openvdb::v12_1::ax::ast::ExternalVariable::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:2034
openvdb::v12_1::ax::ast::ExternalVariable::ExternalVariable
ExternalVariable(const std::string &name, const tokens::CoreType type)
Construct a new ExternalVariable with a given name and type.
Definition AST.h:2009
openvdb::v12_1::ax::ast::ExternalVariable::symbolseparator
static char symbolseparator()
Static method returning the symbol associated with an ExternalVariable access as defined by AX Gramma...
Definition AST.h:2062
openvdb::v12_1::ax::ast::ExternalVariable::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:2036
openvdb::v12_1::ax::ast::ExternalVariable::tokenname
const std::string tokenname() const
Construct and return the full external token identifier. See ExternalVariable::tokenFromNameType.
Definition AST.h:2055
openvdb::v12_1::ax::ast::ExternalVariable::ExternalVariable
ExternalVariable(const std::string &name, const std::string &token)
Construct a new ExternalVariable with a given name and type/token string, delegating construction to ...
Definition AST.h:2017
openvdb::v12_1::ax::ast::ExternalVariable::ExternalVariable
ExternalVariable(const ExternalVariable &other)
Deep copy constructor for a ExternalVariable.
Definition AST.h:2024
openvdb::v12_1::ax::ast::ExternalVariable::basetype
const Variable * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:2040
openvdb::v12_1::ax::ast::ExternalVariable::tokenFromNameType
static std::string tokenFromNameType(const std::string &name, const tokens::CoreType type)
Static method returning the full unique external token identifier by consolidating its name and type ...
Definition AST.h:2076
openvdb::v12_1::ax::ast::ExternalVariable::UniquePtr
std::unique_ptr< ExternalVariable > UniquePtr
Definition AST.h:2004
openvdb::v12_1::ax::ast::ExternalVariable::nametypeFromToken
static bool nametypeFromToken(const std::string &token, std::string *name, std::string *type)
Static method which splits a valid external token into its name and type counterparts....
Definition AST.h:2092
openvdb::v12_1::ax::ast::ExternalVariable::type
tokens::CoreType type() const
Access the type that was used to access this external variable.
Definition AST.h:2044
openvdb::v12_1::ax::ast::ExternalVariable::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:2038
openvdb::v12_1::ax::ast::ExternalVariable::copy
ExternalVariable * copy() const override final
The deep copy method for a Node.
Definition AST.h:2030
openvdb::v12_1::ax::ast::ExternalVariable::~ExternalVariable
~ExternalVariable() override=default
openvdb::v12_1::ax::ast::ExternalVariable::typestr
std::string typestr() const
Get the access type as a front end AX type/token string.
Definition AST.h:2049
openvdb::v12_1::ax::ast::FunctionCall::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1589
openvdb::v12_1::ax::ast::FunctionCall::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1591
openvdb::v12_1::ax::ast::FunctionCall::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1599
openvdb::v12_1::ax::ast::FunctionCall::name
const std::string & name() const
Access the function name/identifier.
Definition AST.h:1614
openvdb::v12_1::ax::ast::FunctionCall::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1597
openvdb::v12_1::ax::ast::FunctionCall::size
size_t size() const
Alias for FunctionCall::children.
Definition AST.h:1620
openvdb::v12_1::ax::ast::FunctionCall::numArgs
size_t numArgs() const
Query the total number of arguments stored on this function.
Definition AST.h:1617
openvdb::v12_1::ax::ast::FunctionCall::UniquePtr
std::unique_ptr< FunctionCall > UniquePtr
Definition AST.h:1543
openvdb::v12_1::ax::ast::FunctionCall::FunctionCall
FunctionCall(const std::string &function, const std::vector< Expression * > &arguments)
Construct a new FunctionCall with a given function identifier and optional argument list,...
Definition AST.h:1563
openvdb::v12_1::ax::ast::FunctionCall::append
void append(Expression *expr)
Appends an argument to this function call, transferring ownership to the FunctionCall and updating pa...
Definition AST.h:1627
openvdb::v12_1::ax::ast::FunctionCall::empty
bool empty() const
Query whether this Expression list holds any valid expressions.
Definition AST.h:1623
openvdb::v12_1::ax::ast::FunctionCall::~FunctionCall
~FunctionCall() override=default
openvdb::v12_1::ax::ast::FunctionCall::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1595
openvdb::v12_1::ax::ast::FunctionCall::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1604
openvdb::v12_1::ax::ast::FunctionCall::copy
FunctionCall * copy() const override final
The deep copy method for a Node.
Definition AST.h:1587
openvdb::v12_1::ax::ast::FunctionCall::FunctionCall
FunctionCall(const FunctionCall &other)
Deep copy constructor for a FunctionCall, performing a deep copy on all held function arguments,...
Definition AST.h:1576
openvdb::v12_1::ax::ast::FunctionCall::FunctionCall
FunctionCall(const std::string &function, Expression *argument=nullptr)
Construct a new FunctionCall with a given function identifier and an optional argument,...
Definition AST.h:1551
openvdb::v12_1::ax::ast::FunctionCall::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1593
openvdb::v12_1::ax::ast::Keyword::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1658
openvdb::v12_1::ax::ast::Keyword::~Keyword
~Keyword() override=default
openvdb::v12_1::ax::ast::Keyword::keyword
tokens::KeywordToken keyword() const
Query the keyword held on this node.
Definition AST.h:1673
openvdb::v12_1::ax::ast::Keyword::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1660
openvdb::v12_1::ax::ast::Keyword::Keyword
Keyword(const tokens::KeywordToken keyw)
Construct a new Keyword with a given tokens::KeywordToken.
Definition AST.h:1647
openvdb::v12_1::ax::ast::Keyword::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1666
openvdb::v12_1::ax::ast::Keyword::UniquePtr
std::unique_ptr< Keyword > UniquePtr
Definition AST.h:1643
openvdb::v12_1::ax::ast::Keyword::basetype
const Statement * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1664
openvdb::v12_1::ax::ast::Keyword::copy
Keyword * copy() const override final
The deep copy method for a Node.
Definition AST.h:1656
openvdb::v12_1::ax::ast::Keyword::child
const Node * child(const size_t) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1668
openvdb::v12_1::ax::ast::Keyword::Keyword
Keyword(const Keyword &other)
Deep copy constructor for a Keyword.
Definition AST.h:1651
openvdb::v12_1::ax::ast::Keyword::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1662
openvdb::v12_1::ax::ast::Local
Local AST nodes represent a single accesses to a local variable. The only store the name of the varia...
Definition AST.h:2113
openvdb::v12_1::ax::ast::Local::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:2125
openvdb::v12_1::ax::ast::Local::Local
Local(const std::string &name)
Construct a Local with a given name.
Definition AST.h:2118
openvdb::v12_1::ax::ast::Local::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:2127
openvdb::v12_1::ax::ast::Local::UniquePtr
std::unique_ptr< Local > UniquePtr
Definition AST.h:2114
openvdb::v12_1::ax::ast::Local::basetype
const Variable * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:2131
openvdb::v12_1::ax::ast::Local::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:2129
openvdb::v12_1::ax::ast::Local::copy
Local * copy() const override final
The deep copy method for a Node.
Definition AST.h:2123
openvdb::v12_1::ax::ast::Local::~Local
~Local() override=default
openvdb::v12_1::ax::ast::Loop::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:772
openvdb::v12_1::ax::ast::Loop::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:774
openvdb::v12_1::ax::ast::Loop::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:781
openvdb::v12_1::ax::ast::Loop::basetype
const Statement * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:778
openvdb::v12_1::ax::ast::Loop::condition
const Statement * condition() const
Access a const pointer to the Loop condition as an abstract statement.
Definition AST.h:835
openvdb::v12_1::ax::ast::Loop::child
const Statement * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:783
openvdb::v12_1::ax::ast::Loop::Loop
Loop(const Loop &other)
Deep copy constructor for an Loop, performing a deep copy on the condition, body and initial Statemen...
Definition AST.h:750
openvdb::v12_1::ax::ast::Loop::copy
Loop * copy() const override final
The deep copy method for a Node.
Definition AST.h:770
openvdb::v12_1::ax::ast::Loop::Loop
Loop(const tokens::LoopToken loopType, Statement *condition, Block *body, Statement *init=nullptr, Expression *iter=nullptr)
Construct a new Loop with the type defined by a tokens::LoopToken, a condition Statement,...
Definition AST.h:723
openvdb::v12_1::ax::ast::Loop::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:791
openvdb::v12_1::ax::ast::Loop::hasIter
bool hasIter() const
Query if this Loop has a valid iteration expression list.
Definition AST.h:831
openvdb::v12_1::ax::ast::Loop::loopType
tokens::LoopToken loopType() const
Query the type of loop held on this node.
Definition AST.h:825
openvdb::v12_1::ax::ast::Loop::initial
const Statement * initial() const
Access a const pointer to the Loop initial statement as an abstract statement.
Definition AST.h:842
openvdb::v12_1::ax::ast::Loop::~Loop
~Loop() override=default
openvdb::v12_1::ax::ast::Loop::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:776
openvdb::v12_1::ax::ast::Loop::iteration
const Expression * iteration() const
Access a const pointer to the Loop iteration Expression.
Definition AST.h:845
openvdb::v12_1::ax::ast::Loop::UniquePtr
std::unique_ptr< Loop > UniquePtr
Definition AST.h:710
openvdb::v12_1::ax::ast::Loop::hasInit
bool hasInit() const
Query if this Loop has a valid initial statement.
Definition AST.h:828
openvdb::v12_1::ax::ast::Loop::body
const Block * body() const
Access a const pointer to the Loop body as a Block.
Definition AST.h:838
openvdb::v12_1::ax::ast::Node
The base abstract node which determines the interface and required methods for all derived concrete n...
Definition AST.h:103
openvdb::v12_1::ax::ast::Node::replace
bool replace(Node *node)
In place replacement. Attempts to replace this node at its specific location within its Abstract Synt...
Definition AST.h:248
openvdb::v12_1::ax::ast::Node::UniquePtr
std::unique_ptr< Node > UniquePtr
Definition AST.h:105
openvdb::v12_1::ax::ast::Node::Node
Node()=default
openvdb::v12_1::ax::ast::Node::replacechild
virtual bool replacechild(const size_t index, Node *node)
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:300
openvdb::v12_1::ax::ast::Node::children
virtual size_t children() const =0
Virtual method for accessing child information. Returns the number of children a given AST node owns.
openvdb::v12_1::ax::ast::Node::isType
bool isType() const
Query whether or not this node is of a specific (derived) type. This method should be used to check i...
Definition AST.h:185
openvdb::v12_1::ax::ast::Node::child
virtual const Node * child(const size_t index) const =0
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
openvdb::v12_1::ax::ast::Node::childidx
int64_t childidx() const
Returns the child index of this node in relation to its parent, or -1 if no valid index is found (usu...
Definition AST.h:212
openvdb::v12_1::ax::ast::Node::copy
virtual Node * copy() const =0
The deep copy method for a Node.
openvdb::v12_1::ax::ast::Node::subname
virtual const char * subname() const =0
Virtual method for accessing node name information.
openvdb::v12_1::ax::ast::Node::nodename
virtual const char * nodename() const =0
Virtual method for accessing node name information.
openvdb::v12_1::ax::ast::Node::~Node
virtual ~Node()=default
openvdb::v12_1::ax::ast::Node::Ptr
std::shared_ptr< Node > Ptr
Definition AST.h:104
openvdb::v12_1::ax::ast::Node::NodeType
NodeType
An enumerated list of node types for all concrete node types. These can be used for faster evaluation...
Definition AST.h:118
openvdb::v12_1::ax::ast::Node::TernaryOperatorNode
@ TernaryOperatorNode
Definition AST.h:130
openvdb::v12_1::ax::ast::Node::BinaryOperatorNode
@ BinaryOperatorNode
Definition AST.h:129
openvdb::v12_1::ax::ast::Node::LoopNode
@ LoopNode
Definition AST.h:124
openvdb::v12_1::ax::ast::Node::BlockNode
@ BlockNode
Definition AST.h:121
openvdb::v12_1::ax::ast::Node::StatementListNode
@ StatementListNode
Definition AST.h:120
openvdb::v12_1::ax::ast::Node::ConditionalStatementNode
@ ConditionalStatementNode
Definition AST.h:122
openvdb::v12_1::ax::ast::Node::LocalNode
@ LocalNode
Definition AST.h:138
openvdb::v12_1::ax::ast::Node::FunctionCallNode
@ FunctionCallNode
Definition AST.h:133
openvdb::v12_1::ax::ast::Node::UnaryOperatorNode
@ UnaryOperatorNode
Definition AST.h:128
openvdb::v12_1::ax::ast::Node::ArrayPackNode
@ ArrayPackNode
Definition AST.h:136
openvdb::v12_1::ax::ast::Node::TreeNode
@ TreeNode
Definition AST.h:119
openvdb::v12_1::ax::ast::Node::ValueInt32Node
@ ValueInt32Node
Definition AST.h:141
openvdb::v12_1::ax::ast::Node::AttributeNode
@ AttributeNode
Definition AST.h:132
openvdb::v12_1::ax::ast::Node::ValueInt16Node
@ ValueInt16Node
Definition AST.h:140
openvdb::v12_1::ax::ast::Node::ExternalVariableNode
@ ExternalVariableNode
Definition AST.h:134
openvdb::v12_1::ax::ast::Node::CommaOperatorNode
@ CommaOperatorNode
Definition AST.h:123
openvdb::v12_1::ax::ast::Node::ArrayUnpackNode
@ ArrayUnpackNode
Definition AST.h:137
openvdb::v12_1::ax::ast::Node::ValueStrNode
@ ValueStrNode
Definition AST.h:145
openvdb::v12_1::ax::ast::Node::KeywordNode
@ KeywordNode
Definition AST.h:125
openvdb::v12_1::ax::ast::Node::DeclareLocalNode
@ DeclareLocalNode
Definition AST.h:135
openvdb::v12_1::ax::ast::Node::ValueBoolNode
@ ValueBoolNode
Definition AST.h:139
openvdb::v12_1::ax::ast::Node::ValueDoubleNode
@ ValueDoubleNode
Definition AST.h:144
openvdb::v12_1::ax::ast::Node::ValueFloatNode
@ ValueFloatNode
Definition AST.h:143
openvdb::v12_1::ax::ast::Node::CrementNode
@ CrementNode
Definition AST.h:127
openvdb::v12_1::ax::ast::Node::AssignExpressionNode
@ AssignExpressionNode
Definition AST.h:126
openvdb::v12_1::ax::ast::Node::ValueInt64Node
@ ValueInt64Node
Definition AST.h:142
openvdb::v12_1::ax::ast::Node::CastNode
@ CastNode
Definition AST.h:131
openvdb::v12_1::ax::ast::Node::setParent
void setParent(Node *parent)
Set this node's parent. This is used during construction of an AST and should not be used.
Definition AST.h:277
openvdb::v12_1::ax::ast::Node::basetype
virtual const Node * basetype() const
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:176
openvdb::v12_1::ax::ast::Node::parent
const Node * parent() const
Access a const pointer to this nodes parent.
Definition AST.h:272
openvdb::v12_1::ax::ast::Node::nodetype
virtual NodeType nodetype() const =0
Virtual method for accessing node type information.
openvdb::v12_1::ax::ast::StatementList::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:426
openvdb::v12_1::ax::ast::StatementList::UniquePtr
std::unique_ptr< StatementList > UniquePtr
Definition AST.h:388
openvdb::v12_1::ax::ast::StatementList::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:428
openvdb::v12_1::ax::ast::StatementList::StatementList
StatementList(const std::vector< Statement * > &statements)
Construct a new StatementList from a vector of statements, transferring ownership of all valid statem...
Definition AST.h:406
openvdb::v12_1::ax::ast::StatementList::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:435
openvdb::v12_1::ax::ast::StatementList::size
size_t size() const
Alias for StatementList::children.
Definition AST.h:452
openvdb::v12_1::ax::ast::StatementList::basetype
const Statement * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:432
openvdb::v12_1::ax::ast::StatementList::StatementList
StatementList(const StatementList &other)
Deep copy constructor for a StatementList, performing a deep copy on every held statement,...
Definition AST.h:416
openvdb::v12_1::ax::ast::StatementList::child
const Statement * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:437
openvdb::v12_1::ax::ast::StatementList::~StatementList
~StatementList() override=default
openvdb::v12_1::ax::ast::StatementList::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:442
openvdb::v12_1::ax::ast::StatementList::addStatement
void addStatement(Statement *stmnt)
Adds a statement to this statement list, transferring ownership to the statement list and updating pa...
Definition AST.h:456
openvdb::v12_1::ax::ast::StatementList::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:430
openvdb::v12_1::ax::ast::StatementList::copy
StatementList * copy() const override
The deep copy method for a Node.
Definition AST.h:424
openvdb::v12_1::ax::ast::StatementList::StatementList
StatementList(Statement *statement)
Construct a new StatementList with a single statement, transferring ownership of the statement to the...
Definition AST.h:397
openvdb::v12_1::ax::ast::StatementList::StatementList
StatementList()
Construct a new StatementList with an empty list.
Definition AST.h:391
openvdb::v12_1::ax::ast::Statement
Abstract (pure-virtual) AST nodes.
Definition AST.h:313
openvdb::v12_1::ax::ast::Statement::basetype
const Node * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:317
openvdb::v12_1::ax::ast::Statement::~Statement
~Statement() override=default
openvdb::v12_1::ax::ast::Statement::UniquePtr
std::unique_ptr< Statement > UniquePtr
Definition AST.h:314
openvdb::v12_1::ax::ast::Statement::copy
virtual Statement * copy() const override=0
The deep copy method for a Node.
openvdb::v12_1::ax::ast::TernaryOperator::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1136
openvdb::v12_1::ax::ast::TernaryOperator::~TernaryOperator
~TernaryOperator() override=default
openvdb::v12_1::ax::ast::TernaryOperator::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1138
openvdb::v12_1::ax::ast::TernaryOperator::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1146
openvdb::v12_1::ax::ast::TernaryOperator::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1144
openvdb::v12_1::ax::ast::TernaryOperator::copy
TernaryOperator * copy() const override final
The deep copy method for a Node.
Definition AST.h:1132
openvdb::v12_1::ax::ast::TernaryOperator::TernaryOperator
TernaryOperator(const TernaryOperator &other)
Deep copy constructor for a TernaryOperator, performing a deep copy on held expressions,...
Definition AST.h:1121
openvdb::v12_1::ax::ast::TernaryOperator::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1142
openvdb::v12_1::ax::ast::TernaryOperator::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1153
openvdb::v12_1::ax::ast::TernaryOperator::trueBranch
const Expression * trueBranch() const
Access a const pointer to the TernaryOperator true expression as an abstract expression.
Definition AST.h:1181
openvdb::v12_1::ax::ast::TernaryOperator::falseBranch
const Expression * falseBranch() const
Access a const pointer to the TernaryOperator false expression as an abstract expression.
Definition AST.h:1185
openvdb::v12_1::ax::ast::TernaryOperator::hasTrue
bool hasTrue() const
Query whether or not this has an optional if-true branch.
Definition AST.h:1173
openvdb::v12_1::ax::ast::TernaryOperator::TernaryOperator
TernaryOperator(Expression *conditional, Expression *trueExpression, Expression *falseExpression)
Construct a new TernaryOperator with a conditional expression and true (optional) and false expressio...
Definition AST.h:1105
openvdb::v12_1::ax::ast::TernaryOperator::UniquePtr
std::unique_ptr< TernaryOperator > UniquePtr
Definition AST.h:1094
openvdb::v12_1::ax::ast::TernaryOperator::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1140
openvdb::v12_1::ax::ast::TernaryOperator::condition
const Expression * condition() const
Access a const pointer to the TernaryOperator conditional as an abstract expression.
Definition AST.h:1177
openvdb::v12_1::ax::ast::Tree
A Tree is the highest concrete (non-abstract) node in the entire AX AST hierarchy....
Definition AST.h:563
openvdb::v12_1::ax::ast::Tree::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:588
openvdb::v12_1::ax::ast::Tree::Tree
Tree(const Tree &other)
Deep copy constructor for a Tree, performing a deep copy on the held Block, ensuring parent informati...
Definition AST.h:579
openvdb::v12_1::ax::ast::Tree::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:590
openvdb::v12_1::ax::ast::Tree::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:597
openvdb::v12_1::ax::ast::Tree::Tree
Tree(Block *block=new Block())
Construct a new Tree from a given Block, transferring ownership of the Block to the tree and updating...
Definition AST.h:572
openvdb::v12_1::ax::ast::Tree::basetype
const Node * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:594
openvdb::v12_1::ax::ast::Tree::copy
Tree * copy() const override final
The deep copy method for a Node.
Definition AST.h:586
openvdb::v12_1::ax::ast::Tree::UniquePtr
std::unique_ptr< Tree > UniquePtr
Definition AST.h:566
openvdb::v12_1::ax::ast::Tree::~Tree
~Tree() override=default
openvdb::v12_1::ax::ast::Tree::Ptr
std::shared_ptr< Tree > Ptr
Definition AST.h:564
openvdb::v12_1::ax::ast::Tree::ConstPtr
std::shared_ptr< const Tree > ConstPtr
Definition AST.h:565
openvdb::v12_1::ax::ast::Tree::child
const Block * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:599
openvdb::v12_1::ax::ast::Tree::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:592
openvdb::v12_1::ax::ast::UnaryOperator::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:1424
openvdb::v12_1::ax::ast::UnaryOperator::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:1426
openvdb::v12_1::ax::ast::UnaryOperator::child
const Expression * child(const size_t i) const override final
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:1434
openvdb::v12_1::ax::ast::UnaryOperator::UniquePtr
std::unique_ptr< UnaryOperator > UniquePtr
Definition AST.h:1391
openvdb::v12_1::ax::ast::UnaryOperator::UnaryOperator
UnaryOperator(Expression *expr, const tokens::OperatorToken op)
Construct a new UnaryOperator with a given tokens::OperatorToken and a valid expression,...
Definition AST.h:1398
openvdb::v12_1::ax::ast::UnaryOperator::children
size_t children() const override final
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:1432
openvdb::v12_1::ax::ast::UnaryOperator::operation
tokens::OperatorToken operation() const
Query the type of unary operation held on this node.
Definition AST.h:1450
openvdb::v12_1::ax::ast::UnaryOperator::expression
const Expression * expression() const
Access a const pointer to the UnaryOperator expression as an abstract expression.
Definition AST.h:1454
openvdb::v12_1::ax::ast::UnaryOperator::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:1430
openvdb::v12_1::ax::ast::UnaryOperator::replacechild
bool replacechild(const size_t i, Node *node) override final
Virtual method that attempted to replace a child at a given index with a provided node type.
Definition AST.h:1439
openvdb::v12_1::ax::ast::UnaryOperator::UnaryOperator
UnaryOperator(Expression *expr, const std::string &op)
Construct a new UnaryOperator with a string, delegating construction to the above UnaryOperator const...
Definition AST.h:1408
openvdb::v12_1::ax::ast::UnaryOperator::UnaryOperator
UnaryOperator(const UnaryOperator &other)
Deep copy constructor for a UnaryOperator, performing a deep copy on the underlying expressions,...
Definition AST.h:1414
openvdb::v12_1::ax::ast::UnaryOperator::~UnaryOperator
~UnaryOperator() override=default
openvdb::v12_1::ax::ast::UnaryOperator::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:1428
openvdb::v12_1::ax::ast::UnaryOperator::copy
UnaryOperator * copy() const override final
The deep copy method for a Node.
Definition AST.h:1422
openvdb::v12_1::ax::ast::ValueBase
ValueBases are a base class for anything that holds a value (literal). Derived classes store the actu...
Definition AST.h:362
openvdb::v12_1::ax::ast::ValueBase::copy
virtual Expression * copy() const override=0
The deep copy method for a Node.
openvdb::v12_1::ax::ast::ValueBase::children
size_t children() const override
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:368
openvdb::v12_1::ax::ast::ValueBase::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:366
openvdb::v12_1::ax::ast::ValueBase::~ValueBase
~ValueBase() override=default
openvdb::v12_1::ax::ast::ValueBase::UniquePtr
std::unique_ptr< ValueBase > UniquePtr
Definition AST.h:363
openvdb::v12_1::ax::ast::ValueBase::child
const Node * child(const size_t) const override
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:369
openvdb::v12_1::ax::ast::Value< std::string >::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:2351
openvdb::v12_1::ax::ast::Value< std::string >::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:2352
openvdb::v12_1::ax::ast::Value< std::string >::copy
Value< Type > * copy() const override final
The deep copy method for a Node.
Definition AST.h:2350
openvdb::v12_1::ax::ast::Value< std::string >::Value
Value(const Type &value)
Construct a new Value string from a string.
Definition AST.h:2342
openvdb::v12_1::ax::ast::Value< std::string >::basetype
const ValueBase * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:2354
openvdb::v12_1::ax::ast::Value< std::string >::value
const std::string & value() const
Access the string.
Definition AST.h:2358
openvdb::v12_1::ax::ast::Value< std::string >::~Value
~Value() override=default
openvdb::v12_1::ax::ast::Value< std::string >::UniquePtr
std::unique_ptr< Value< std::string > > UniquePtr
Definition AST.h:2337
openvdb::v12_1::ax::ast::Value< std::string >::Value
Value(const Value< Type > &other)
Deep copy constructor for a Value string.
Definition AST.h:2347
openvdb::v12_1::ax::ast::Value< std::string >::Type
std::string Type
Definition AST.h:2339
openvdb::v12_1::ax::ast::Value< std::string >::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:2353
openvdb::v12_1::ax::ast::Value::nodetype
NodeType nodetype() const override
Virtual method for accessing node type information.
Definition AST.h:2291
openvdb::v12_1::ax::ast::Value::Value
Value(const Value< T > &other)
Deep copy constructor for a Value.
Definition AST.h:2284
openvdb::v12_1::ax::ast::Value::Type
T Type
Definition AST.h:2257
openvdb::v12_1::ax::ast::Value::nodename
const char * nodename() const override
Virtual method for accessing node name information.
Definition AST.h:2300
openvdb::v12_1::ax::ast::Value::IsSupported
static constexpr bool IsSupported
The list of supported numerical constants.
Definition AST.h:2266
openvdb::v12_1::ax::ast::Value::copy
Value< Type > * copy() const override final
The deep copy method for a Node.
Definition AST.h:2289
openvdb::v12_1::ax::ast::Value::ContainerType
typename std::conditional< std::is_integral< T >::value, uint64_t, T >::type ContainerType
Integers and Floats store their value as ContainerType, which is guaranteed to be at least large enou...
Definition AST.h:2261
openvdb::v12_1::ax::ast::Value::basetype
const ValueBase * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:2318
openvdb::v12_1::ax::ast::Value::UniquePtr
std::unique_ptr< Value< T > > UniquePtr
Definition AST.h:2255
openvdb::v12_1::ax::ast::Value::~Value
~Value() override=default
openvdb::v12_1::ax::ast::Value::Value
Value(const ContainerType value)
Directly construct a Value from a source integer, float or boolean, guaranteeing valid construction....
Definition AST.h:2278
openvdb::v12_1::ax::ast::Value::asContainerType
ContainerType asContainerType() const
Access the value as its stored type.
Definition AST.h:2322
openvdb::v12_1::ax::ast::Value::value
T value() const
Access the value as its requested (templated) type.
Definition AST.h:2325
openvdb::v12_1::ax::ast::Value::subname
const char * subname() const override
Virtual method for accessing node name information.
Definition AST.h:2309
openvdb::v12_1::ax::ast::Variable::children
size_t children() const override
Virtual method for accessing child information. Returns the number of children a given AST node owns.
Definition AST.h:350
openvdb::v12_1::ax::ast::Variable::name
const std::string & name() const
Definition AST.h:353
openvdb::v12_1::ax::ast::Variable::Variable
Variable(const std::string &name)
Definition AST.h:341
openvdb::v12_1::ax::ast::Variable::~Variable
~Variable() override=default
openvdb::v12_1::ax::ast::Variable::copy
virtual Variable * copy() const override=0
The deep copy method for a Node.
openvdb::v12_1::ax::ast::Variable::basetype
const Expression * basetype() const override
Virtual method for accessing a node's base class. Note that if this is called explicitly on an instan...
Definition AST.h:348
openvdb::v12_1::ax::ast::Variable::UniquePtr
std::unique_ptr< Variable > UniquePtr
Definition AST.h:339
openvdb::v12_1::ax::ast::Variable::child
const Node * child(const size_t) const override
Virtual method for accessing child information. Returns a const pointer to a child node at the given ...
Definition AST.h:351
openvdb::v12_1::ax::ast::Variable::Variable
Variable(const Variable &other)
Definition AST.h:343
OPENVDB_VERSION_NAME
#define OPENVDB_VERSION_NAME
The version namespace name for this library version.
Definition version.h.in:121
OPENVDB_USE_VERSION_NAMESPACE
#define OPENVDB_USE_VERSION_NAMESPACE
Definition version.h.in:218