Implement the first piece of a -Wc++98-compat flag so that people can build in

C++11 mode but keep their sources compatible with C++98.  This patch implements
the -Wc++98-compat-variadic-templates sub-flag and -Wc++98-compat to include
it.

llvm-svn: 141898

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/cxx98-compat.cpp b/clang/test/SemaCXX/cxx98-compat.cpp
new file mode 100644
index 00000000000..37815d47971
--- /dev/null
+++ b/clang/test/SemaCXX/cxx98-compat.cpp
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -fsyntax-only -std=c++0x -Wc++98-compat -verify %s
+
+template<typename ...T>  // expected-warning {{variadic templates are incompatible with C++98}}
+class Variadic1 {};
+
+template<template<typename> class ...T>  // expected-warning {{variadic templates are incompatible with C++98}}
+class Variadic2 {};
+
+template<int ...I>  // expected-warning {{variadic templates are incompatible with C++98}}
+class Variadic3 {};