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Add support for static assertions in C++ 

This allows modules written in C++ to use or include header files that
use StaticAssertStmt() etc.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
This commit is contained in:
Peter Eisentraut 2016-08-30 12:00:00 -04:00
parent 0689dc3a23
commit a2c8e5cfdb
1 changed files with 14 additions and 0 deletions
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14
src/include/c.h
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@ -754,6 +754,7 @@ typedef NameData *Name;
* about a negative width for a struct bit-field. This will not include a
* helpful error message, but it beats not getting an error at all.
*/
#ifndef __cplusplus
#ifdef HAVE__STATIC_ASSERT
#define StaticAssertStmt(condition, errmessage) \
do { _Static_assert(condition, errmessage); } while(0)
@ -765,6 +766,19 @@ typedef NameData *Name;
#define StaticAssertExpr(condition, errmessage) \
StaticAssertStmt(condition, errmessage)
#endif /* HAVE__STATIC_ASSERT */
#else /* C++ */
#if defined(__cpp_static_assert) && __cpp_static_assert >= 200410
#define StaticAssertStmt(condition, errmessage) \
static_assert(condition, errmessage)
#define StaticAssertExpr(condition, errmessage) \
StaticAssertStmt(condition, errmessage)
#else
#define StaticAssertStmt(condition, errmessage) \
do { struct static_assert_struct { int static_assert_failure : (condition) ? 1 : -1; }; } while(0)
#define StaticAssertExpr(condition, errmessage) \
({ StaticAssertStmt(condition, errmessage); })
#endif
#endif /* C++ */
/*