File: nullability.c

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// RUN: %clang_cc1 -fsyntax-only -std=c99 -Wno-nullability-declspec -pedantic %s -verify

_Nonnull int *ptr; // expected-warning{{type nullability specifier '_Nonnull' is a Clang extension}}

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wnullability-extension"
_Nonnull int *ptr2; // no-warning
#pragma clang diagnostic pop

#if !__has_feature(nullability)
#  error Nullability should always be supported
#endif

#if !__has_extension(nullability)
#  error Nullability should always be supported as an extension
#endif