From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Sat, 15 Oct 2011 05:42:01 +0000 (+0000)
Subject: Add -Wc++98-compat warning for deduced 'auto' type specifier.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0aa86c0463a881be85fd34e04c7de3379997621d;p=clang

Add -Wc++98-compat warning for deduced 'auto' type specifier.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@142057 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Basic/DiagnosticSemaKinds.td b/include/clang/Basic/DiagnosticSemaKinds.td
index 0fbf0cee0a..1fb8fb8b97 100644
--- a/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/include/clang/Basic/DiagnosticSemaKinds.td
@@ -1083,6 +1083,9 @@ def err_cannot_determine_declared_type_of_overloaded_function : Error<
     "cannot determine the type of an overloaded function">;
     
 // C++11 auto
+def warn_cxx98_compat_auto_type_specifier : Warning<
+  "'auto' type specifier is incompatible with C++98">,
+  InGroup<CXX98Compat>, DefaultIgnore;
 def err_auto_variable_cannot_appear_in_own_initializer : Error<
   "variable %0 declared with 'auto' type cannot appear in its own initializer">;
 def err_illegal_decl_array_of_auto : Error<
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index 2b563a50a9..d3a39967de 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -1851,7 +1851,9 @@ static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
         << Error;
       T = SemaRef.Context.IntTy;
       D.setInvalidType(true);
-    }
+    } else
+      SemaRef.Diag(D.getDeclSpec().getTypeSpecTypeLoc(),
+                   diag::warn_cxx98_compat_auto_type_specifier);
   }
 
   if (SemaRef.getLangOptions().CPlusPlus &&
diff --git a/test/SemaCXX/cxx98-compat.cpp b/test/SemaCXX/cxx98-compat.cpp
index d4c433e008..927df1f971 100644
--- a/test/SemaCXX/cxx98-compat.cpp
+++ b/test/SemaCXX/cxx98-compat.cpp
@@ -87,3 +87,6 @@ template<typename T> using AliasTemplate = T; // expected-warning {{alias declar
 
 inline namespace N { // expected-warning {{inline namespaces are incompatible with C++98}}
 }
+
+auto auto_deduction = 0; // expected-warning {{'auto' type specifier is incompatible with C++98}}
+int *p = new auto(0); // expected-warning {{'auto' type specifier is incompatible with C++98}}