add push/pop semantics for diagnostics. Patch by Louis Gerbarg!

llvm-svn: 75431

1 files changed, 17 insertions, 0 deletions

diff --git a/clang/test/Preprocessor/pushable-diagnostics.c b/clang/test/Preprocessor/pushable-diagnostics.c
new file mode 100644
index 00000000000..fe55122d66c
--- /dev/null
+++ b/clang/test/Preprocessor/pushable-diagnostics.c
@@ -0,0 +1,17 @@
+// RUN: clang-cc -fsyntax-only -verify -pedantic %s
+
+#pragma clang diagnostic pop // expected-warning{{pragma diagnostic pop could not pop, no matching push}}
+
+#pragma clang diagnostic puhs // expected-warning{{pragma diagnostic expected 'error', 'warning', 'ignored', 'fatal' 'push', or 'pop'}}
+
+char a = 'df'; // expected-warning{{multi-character character constant}}
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmultichar"
+
+char b = 'df'; // no warning.
+#pragma clang diagnostic pop
+
+char c = 'df';  // expected-warning{{multi-character character constant}}
+
+#pragma clang diagnostic pop // expected-warning{{pragma diagnostic pop could not pop, no matching push}}