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Avoid warning when using G_STMT_END macro with MSVC

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Workaround found on
http://cnicholson.net/2009/03/stupid-c-tricks-dowhile0-and-c4127/

https://bugzilla.gnome.org/show_bug.cgi?id=742851
This commit is contained in:
Paolo Borelli 2015-01-13 12:44:20 +01:00
parent 432476355b
commit 7a8ef00aae
1 changed files with 10 additions and 0 deletions
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10
glib/gmacros.h
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@ -279,11 +279,21 @@
* if (x) G_STMT_START { ... } G_STMT_END; else ...
* This intentionally does not use compiler extensions like GCC's '({...})' to
* avoid portability issue or side effects when compiled with different compilers.
* MSVC complains about "while(0)": C4127: “Conditional expression is constant”,
* so we use __pragma to avoid the warning since the use here is intentional.
*/
#if !(defined (G_STMT_START) && defined (G_STMT_END))
#define G_STMT_START do
#if defined (_MSC_VER) && (_MSC_VER >= 1500)
#define G_STMT_END \
__pragma(warning(push)) \
__pragma(warning(disable:4127)) \
while(0) \
__pragma(warning(pop))
#else
#define G_STMT_END while (0)
#endif
#endif
/* Deprecated -- do not use. */
#ifndef G_DISABLE_DEPRECATED