modernize-use-nullptr¶
The check converts the usage of null pointer constants (e.g. NULL
, 0
)
to use the new C++11 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 with
NULL
. By default this check will only replace theNULL
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
.