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// RUN: %clang_cc1 -verify -fsyntax-only -Wshadow -Wold-style-cast -Wc++20-designator %s
// Test that macro expansions from system headers don't trigger 'syntactic'
// warnings that are not actionable.
#ifdef IS_SYSHEADER
#pragma clang system_header
#define SANITY(a) (a / 0)
#define SHADOW(a) __extension__({ int v = a; v; })
#define OLD_STYLE_CAST(a) ((int) (a))
struct Foo {
int x;
};
#define DESIGNATED_INITIALIZERS (Foo{.x = 123})
#else
#define IS_SYSHEADER
#include __FILE__
void testSanity() {
// Validate that the test is set up correctly
int i = SANITY(0); // expected-warning {{division by zero is undefined}}
}
void PR16093() {
// no -Wshadow in system macro expansion
int i = SHADOW(SHADOW(1));
}
void PR18147() {
// no -Wold-style-cast in system macro expansion
int i = OLD_STYLE_CAST(0);
}
void PR52944() {
// no -Wc++20-designator in system macro expansion
auto i = DESIGNATED_INITIALIZERS;
}
#endif
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