Suppress -Wunused-variable for variables declared in headers, which may in

fact be defined and used in another TU.

Reshuffle some test cases because we suppress -Wunused-variable after we've
emitted an error.

This fixes PR15558.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179138 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/test/SemaCXX/warn-unused-variables-error.cpp b/test/SemaCXX/warn-unused-variables-error.cpp
new file mode 100644
index 0000000000..6386c4b682
--- /dev/null
+++ b/test/SemaCXX/warn-unused-variables-error.cpp
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -fsyntax-only -Wunused-variable -verify %s
+
+namespace PR6948 {
+  template<typename T> class X; // expected-note{{template is declared here}}
+  
+  void f() {
+    X<char> str (read_from_file()); // expected-error{{use of undeclared identifier 'read_from_file'}} \
+                                       expected-error{{implicit instantiation of undefined template 'PR6948::X<char>'}}
+  }
+}