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// RUN: %clang_cc1 %s -Eonly -verify -Wno-all -pedantic -std=c++20
// RUN: %clang_cc1 %s -Eonly -verify -Wno-all -pedantic -std=c++11
// RUN: %clang_cc1 -x c %s -Eonly -verify -Wno-all -pedantic -std=c99
//expected-error@+1{{missing '('}}
#define V1(...) __VA_OPT__
#undef V1
// OK
#define V1(...) __VA_OPT__ ()
#undef V1
//expected-warning@+1{{can only appear in the expansion of a variadic macro}}
#define V2() __VA_OPT__(x)
#undef V2
//expected-error@+2{{missing ')' after}}
//expected-note@+1{{to match this '('}}
#define V3(...) __VA_OPT__(
#undef V3
#define V4(...) __VA_OPT__(__VA_ARGS__)
#undef V4
//expected-error@+1{{nested}}
#define V5(...) __VA_OPT__(__VA_OPT__())
#undef V5
//expected-error@+1{{not followed by}}
#define V1(...) __VA_OPT__ (#)
#undef V1
//expected-error@+1{{cannot appear at start}}
#define V1(...) __VA_OPT__ (##)
#undef V1
//expected-error@+1{{cannot appear at start}}
#define V1(...) __VA_OPT__ (## X) x
#undef V1
//expected-error@+1{{cannot appear at end}}
#define V1(...) y __VA_OPT__ (X ##)
#undef V1
#define FOO(x,...) # __VA_OPT__(x) #x #__VA_OPT__(__VA_ARGS__) //OK
//expected-error@+1{{not followed by a macro parameter}}
#define V1(...) __VA_OPT__(#)
#undef V1
//expected-error@+1{{cannot appear at start}}
#define V1(...) a __VA_OPT__(##) b
#undef V1
//expected-error@+1{{cannot appear at start}}
#define V1(...) a __VA_OPT__(a ## b) b __VA_OPT__(##)
#undef V1
#define V1(x,...) # __VA_OPT__(b x) // OK
#undef V1
//expected-error@+2{{missing ')' after}}
//expected-note@+1{{to match this '('}}
#define V1(...) __VA_OPT__ ((())
#undef V1
// __VA_OPT__ can't appear anywhere else.
#if __VA_OPT__ // expected-warning {{__VA_OPT__ can only appear in the expansion of a variadic macro}}
#endif
// expected-warning@+2 {{__VA_OPT__ can only appear in the expansion of a variadic macro}}
#ifdef __VA_OPT__ // expected-warning {{__VA_OPT__ can only appear in the expansion of a variadic macro}}
#elifdef __VA_OPT__
#endif
#define BAD __VA_OPT__ // expected-warning {{__VA_OPT__ can only appear in the expansion of a variadic macro}}
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