[glib/msvc-static-assert] gmacros.h: Use static_assert on MSVC if possible

[Chun-wei Fan <fanchunwei src gnome org>]

commit 7b91440ca48ab1e06920299a205359a5668398ef
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Jul 2 11:48:43 2019 +0800

    gmacros.h: Use static_assert on MSVC if possible
    
    Visual Studio 2010 and later support static_assert on both C and C++,
    but we can only enable it for plain-C code on Visual Studio 2013 and
    later, as apparently the static_assert macro implementation will carry
    out something after defining certain variables.
    
    For C++ code, we use static_assert on Visual Studio 2010 and later.

 glib/gmacros.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/glib/gmacros.h b/glib/gmacros.h
index fd81416dd..2764d9552 100644
--- a/glib/gmacros.h
+++ b/glib/gmacros.h
@@ -736,7 +736,9 @@
 #define G_PASTE(identifier1,identifier2)      G_PASTE_ARGS (identifier1, identifier2)
 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
 #define G_STATIC_ASSERT(expr) _Static_assert (expr, "Expression evaluates to false")
-#elif defined(__cplusplus) && __cplusplus >= 201103L
+#elif (defined(__cplusplus) && __cplusplus >= 201103L) || \
+      (defined(__cplusplus) && defined (_MSC_VER) && (_MSC_VER >= 1600)) || \
+      (defined (_MSC_VER) && (_MSC_VER >= 1800))
 #define G_STATIC_ASSERT(expr) static_assert (expr, "Expression evaluates to false")
 #else
 #ifdef __COUNTER__