static_assert - cppreference.com (original) (raw)
| | | | | --------------------------------------- | | ---------------------------- | | #define static_assert _Static_assert | | (since C11) (removed in C23) |
This convenience macro expands to the keyword _Static_assert.
[edit] Example
#include <assert.h> int main(void) { static_assert(2 + 2 == 4, "2+2 isn't 4"); // well-formed static_assert(sizeof(int) < sizeof(char), // compile-time error "this program requires that int is less than char"); }
[edit] Notes
Since C23, static_assert is itself a keyword, which may also be a predefined macro, so <assert.h> no longer provides it.
[edit] References
C23 standard (ISO/IEC 9899:2024):
7.2/3 Diagnostics <assert.h> (p: TBD)
C17 standard (ISO/IEC 9899:2018):
7.2/3 Diagnostics <assert.h> (p: 135)
C11 standard (ISO/IEC 9899:2011):
7.2/3 Diagnostics <assert.h> (p: 186)