tidy - modernize-use-nullptr — Extra Clang Tools 22.0.0git documentation (original) (raw)

The check converts the usage of null pointer constants (e.g. NULL, 0) to use the new C++11 and C23 nullptr keyword.

Example¶

void assignment() { char *a = NULL; char *b = 0; char c = 0; }

int *ret_ptr() { return 0; }

transforms to:

void assignment() { char *a = nullptr; char *b = nullptr; char c = 0; }

int *ret_ptr() { return nullptr; }

Options¶

IgnoredTypes¶

Semicolon-separated list of regular expressions to match pointer types for which implicit casts will be ignored. Default value:std::_CmpUnspecifiedParam::;^std::__cmp_cat::__unspec.

NullMacros¶

Comma-separated list of macro names that will be transformed along withNULL. By default this check will only replace the NULL macro and will skip any similar user-defined macros.

Example¶

#define MY_NULL (void*)0 void assignment() { void *p = MY_NULL; }

transforms to:

#define MY_NULL NULL void assignment() { int *p = nullptr; }

if the NullMacros option is set to MY_NULL.