modernize-use-nullptr¶
The check converts the usage of null pointer constants (eg. 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;
}
User defined macros¶
By default this check will only replace the NULL macro and will skip any user-defined macros that behaves like NULL. The user can use the :option:UserNullMacros option to specify a comma-separated list of macro names that will be transformed along with NULL.
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 UserNullMacros option is set to MY_NULL.