test/Preprocessor/pushable-diagnostics.c

// 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}}