Gereralize VA macro expansion mechanism

Avoids code duplication and makes in usable elsewhere.

Author: weltling

Zend/zend_ast.h

@@ -204,27 +204,12 @@ ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_zval_from_long(zend_long lval)
 ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_constant(zend_string *name, zend_ast_attr attr);
 
 #if ZEND_AST_SPEC
-# ifdef ZEND_WIN32
-#  define ZEND_AST_EXPAND_VA(a) a
-# endif
-
-# ifdef ZEND_WIN32
-#  define ZEND_AST_SPEC_CALL(name, ...) \
-	ZEND_AST_EXPAND_VA(ZEND_AST_SPEC_CALL_(name, __VA_ARGS__, _4, _3, _2, _1, _0)(__VA_ARGS__))
-# else
-#  define ZEND_AST_SPEC_CALL(name, ...) \
-	ZEND_AST_SPEC_CALL_(name, __VA_ARGS__, _4, _3, _2, _1, _0)(__VA_ARGS__)
-# endif
+# define ZEND_AST_SPEC_CALL(name, ...) \
+	ZEND_EXPAND_VA(ZEND_AST_SPEC_CALL_(name, __VA_ARGS__, _4, _3, _2, _1, _0)(__VA_ARGS__))
 # define ZEND_AST_SPEC_CALL_(name, _, _4, _3, _2, _1, suffix, ...) \
 	name ## suffix
-
-# ifdef ZEND_WIN32
-#  define ZEND_AST_SPEC_CALL_EX(name, ...) \
-	ZEND_AST_EXPAND_VA(ZEND_AST_SPEC_CALL_EX_(name, __VA_ARGS__, _4, _3, _2, _1, _0)(__VA_ARGS__))
-# else
-#  define ZEND_AST_SPEC_CALL_EX(name, ...) \
-	ZEND_AST_SPEC_CALL_EX_(name, __VA_ARGS__, _4, _3, _2, _1, _0)(__VA_ARGS__)
-# endif
+# define ZEND_AST_SPEC_CALL_EX(name, ...) \
+	ZEND_EXPAND_VA(ZEND_AST_SPEC_CALL_EX_(name, __VA_ARGS__, _4, _3, _2, _1, _0)(__VA_ARGS__))
 # define ZEND_AST_SPEC_CALL_EX_(name, _, _5, _4, _3, _2, _1, suffix, ...) \
 	name ## suffix
 

Zend/zend_portability.h

@@ -638,6 +638,13 @@ static zend_always_inline double _zend_get_nan(void) /* {{{ */
 #define ZEND_SLIDE_TO_ALIGNED(alignment, ptr) (((zend_uintptr_t)(ptr) + ((alignment)-1)) & ~((alignment)-1))
 #define ZEND_SLIDE_TO_ALIGNED16(ptr) ZEND_SLIDE_TO_ALIGNED(Z_UL(16), ptr)
 
+#ifdef ZEND_WIN32
+# define _ZEND_EXPAND_VA(a) a
+# define ZEND_EXPAND_VA(code) _ZEND_EXPAND_VA(code)
+#else
+# define ZEND_EXPAND_VA(code) code
+#endif
+
 #endif /* ZEND_PORTABILITY_H */
 
 /*