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During the ISO C++ Committee meeting plenary session the C++23 Standard has been voted as technical complete. This updates the reference to c++2b to c++23 and updates the __cplusplus macro. Drive-by fixes c++1z -> c++17 and c++2a -> c++20 when seen. Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D149553
25 lines
1.2 KiB
C++
25 lines
1.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx23 -std=c++23 -Wpre-c++23-compat %s
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// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx20 -std=c++20 %s
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void looks_like_decltype_auto() {
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decltype(auto(42)) b = 42; // cxx20-error {{'auto' not allowed here}} \
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cxx23-warning {{'auto' as a functional-style cast is incompatible with C++ standards before C++23}}
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decltype(long *) a = 42; // expected-error {{expected '(' for function-style cast or type construction}} \
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expected-error {{expected expression}}
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decltype(auto *) a = 42; // expected-error {{expected '(' for function-style cast or type construction}} \
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expected-error {{expected expression}}
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decltype(auto()) c = 42; // cxx23-error {{initializer for functional-style cast to 'auto' is empty}} \
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cxx20-error {{'auto' not allowed here}}
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}
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struct looks_like_declaration {
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int n;
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} a;
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using T = looks_like_declaration *;
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void f() { T(&a)->n = 1; }
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// FIXME: They should be deemed expressions without breaking function pointer
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// parameter declarations with trailing return types.
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// void g() { auto(&a)->n = 0; }
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// void h() { auto{&a}->n = 0; }
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