From: Aaron Ballman <aaron@aaronballman.com>
Date: Tue, 27 Aug 2019 20:33:05 +0000 (+0000)
Subject: Diagnose _Bool as a C99 extension.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=ae3841677ef28ba80dc30d74e32a33bf3f6dde8c;p=clang

Diagnose _Bool as a C99 extension.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@370108 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 6c3b6d6e62..c4c5045d2f 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -3777,6 +3777,9 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
       break;
     case tok::kw_bool:
     case tok::kw__Bool:
+      if (Tok.is(tok::kw__Bool) && !getLangOpts().C99)
+        Diag(Tok, diag::ext_c99_feature) << Tok.getName();
+
       if (Tok.is(tok::kw_bool) &&
           DS.getTypeSpecType() != DeclSpec::TST_unspecified &&
           DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
diff --git a/test/Parser/c99.c b/test/Parser/c99.c
index 3828f2057a..1213a20b6e 100644
--- a/test/Parser/c99.c
+++ b/test/Parser/c99.c
@@ -6,3 +6,6 @@ double _Imaginary foo; // ext-warning {{'_Imaginary' is a C99 extension}} \
                        // expected-error {{imaginary types are not supported}}
 double _Complex bar; // ext-warning {{'_Complex' is a C99 extension}}
 
+#if !defined(__cplusplus)
+_Bool baz; // ext-warning {{'_Bool' is a C99 extension}}
+#endif