# Extra Clang Tools 21.1.8 documentation

## clang-tidy - bugprone-argument-comment

# bugprone-argument-comment

Checks that argument comments match parameter names.

The check understands argument comments in the form `/*parameter_name=*/` that are placed right before the argument.

    void f(bool foo);

    ...

    f(/*bar=*/true);
    // warning: argument name 'bar' in comment does not match parameter name 'foo'

The check tries to detect typos and suggest automated fixes for them.

## Options

StrictMode

  When false, the check will ignore leading and trailing underscores and case when comparing names – otherwise they are taken into account. Default is false.

IgnoreSingleArgument

  When true, the check will ignore the single argument. Default is false.

CommentBoolLiterals

  When true, the check will add argument comments in the format `/*ParameterName=*/` right before the boolean literal argument. Default is false.

Before:

    void foo(bool TurnKey, bool PressButton);

    foo(true, false);

After:

    void foo(bool TurnKey, bool PressButton);

    foo(/*TurnKey=*/true, /*PressButton=*/false);

CommentIntegerLiterals

  When true, the check will add argument comments in the format `/*ParameterName=*/` right before the integer literal argument. Default is false.

Before:

    void foo(int MeaningOfLife);

    foo(42);

After:

    void foo(int MeaningOfLife);

    foo(/*MeaningOfLife=*/42);

CommentFloatLiterals

  When true, the check will add argument comments in the format `/*ParameterName=*/` right before the float/double literal argument. Default is false.

Before:

    void foo(float Pi);

    foo(3.14159);

After:

    void foo(float Pi);

    foo(/*Pi=*/3.14159);

CommentStringLiterals

  When true, the check will add argument comments in the format `/*ParameterName=*/` right before the string literal argument. Default is false.

Before:

    void foo(const char *String);
    void foo(const wchar_t *WideString);

    foo("Hello World");
    foo(L"Hello World");

After:

    void foo(const char *String);
    void foo(const wchar_t *WideString);

    foo(/*String=*/"Hello World");
    foo(/*WideString=*/L"Hello World");

CommentCharacterLiterals

  When true, the check will add argument comments in the format `/*ParameterName=*/` right before the character literal argument. Default is false.

Before:

    void foo(char *Character);

    foo('A');

After:

    void foo(char *Character);

    foo(/*Character=*/'A');

CommentUserDefinedLiterals

  When true, the check will add argument comments in the format `/*ParameterName=*/` right before the user defined literal argument. Default is false.

Before:

    void foo(double Distance);

    double operator"" _km(long double);

    foo(402.0_km);

After:

    void foo(double Distance);

    double operator"" _km(long double);

    foo(/*Distance=*/402.0_km);

CommentNullPtrs

  When true, the check will add argument comments in the format `/*ParameterName=*/` right before the nullptr literal argument. Default is false.

Before:

    void foo(A* Value);

    foo(nullptr);

After:

    void foo(A* Value);

    foo(/*Value=*/nullptr);