IdentifierInfo *FeatureII = 0;
// Read the '('.
- Lex(Tok);
+ LexUnexpandedToken(Tok);
if (Tok.is(tok::l_paren)) {
// Read the identifier
- Lex(Tok);
+ LexUnexpandedToken(Tok);
if (Tok.is(tok::identifier) || Tok.is(tok::kw_const)) {
FeatureII = Tok.getIdentifierInfo();
// Read the ')'.
- Lex(Tok);
+ LexUnexpandedToken(Tok);
if (Tok.is(tok::r_paren))
IsValid = true;
}
__has_builtin(__builtin_altivec_abs_v4sf)
#error Broken handling of target-specific builtins
#endif
+
+// Macro expansion does not occur in the parameter to __has_builtin,
+// __has_feature, etc. (as is also expected behaviour for ordinary
+// macros), so the following should not expand:
+
+#define MY_ALIAS_BUILTIN __c11_atomic_init
+#define MY_ALIAS_FEATURE attribute_overloadable
+
+#if __has_builtin(MY_ALIAS_BUILTIN) || __has_feature(MY_ALIAS_FEATURE)
+#error Alias expansion not allowed
+#endif
+
+// But deferring should expand:
+
+#define HAS_BUILTIN(X) __has_builtin(X)
+#define HAS_FEATURE(X) __has_feature(X)
+
+#if !HAS_BUILTIN(MY_ALIAS_BUILTIN) || !HAS_FEATURE(MY_ALIAS_FEATURE)
+#error Expansion should have occurred
+#endif