Skip to content

Instantly share code, notes, and snippets.

@mlabbe

mlabbe/static.h

Created April 9, 2016 05:27
Show Gist options
  • Save mlabbe/e2c26c9a54ed4d05bc49c06388473522 to your computer and use it in GitHub Desktop.
Save mlabbe/e2c26c9a54ed4d05bc49c06388473522 to your computer and use it in GitHub Desktop.
Download ZIP
C89 static assert
Raw
static.h
// usage: FTG_STATIC_ASSERT(1==0)
// error message contains "assertion_at_line_xxx"
//
// usage: FTG_STATIC_ASSERT_MSG(1==0, one_is_not_zero)
// error message contains: "one_is_not_zero"
//
// tested on GCC, Clang, MSVC 98 and MSVC 2015
//
#define FTG_STATIC_ASSERT_MSG(x, msg) typedef int FTG__StaticAssert_##msg[(x) ? 1 : -1]
#define FTG__STATIC_ASSERT_3(x,L) FTG_STATIC_ASSERT_MSG(x, assertion_at_line_##L)
#define FTG__STATIC_ASSERT_2(x,L) FTG__STATIC_ASSERT_3(x,L)
#define FTG_STATIC_ASSERT(x) FTG__STATIC_ASSERT_2(x,__LINE__)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment