0620e6f4b7
As an extension, accept such lambdas in previous standards with a warning. * http://eel.is/c++draft/expr.prim.lambda * http://wg21.link/P1102 Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D98433
39 lines
1.6 KiB
C++
39 lines
1.6 KiB
C++
// RUN: %clang_cc1 -std=c++2b %s -verify
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// RUN: %clang_cc1 -std=c++20 %s -verify
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// RUN: %clang_cc1 -std=c++17 %s -verify
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// RUN: %clang_cc1 -std=c++14 %s -verify
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// RUN: %clang_cc1 -std=c++11 %s -verify
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auto XL0 = [] constexpr { return true; };
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#if __cplusplus <= 201402L
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// expected-warning@-2 {{is a C++17 extension}}
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#endif
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#if __cplusplus <= 202002L
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// expected-warning@-5 {{lambda without a parameter clause is a C++2b extension}}
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#endif
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auto XL1 = []() mutable //
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mutable // expected-error{{cannot appear multiple times}}
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mutable {}; // expected-error{{cannot appear multiple times}}
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#if __cplusplus > 201402L
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auto XL2 = [] () constexpr mutable constexpr { }; //expected-error{{cannot appear multiple times}}
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auto L = []() mutable constexpr { };
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auto L2 = []() constexpr { };
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auto L4 = []() constexpr mutable { };
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auto XL16 = [] () constexpr
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mutable
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constexpr //expected-error{{cannot appear multiple times}}
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mutable //expected-error{{cannot appear multiple times}}
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mutable //expected-error{{cannot appear multiple times}}
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constexpr //expected-error{{cannot appear multiple times}}
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constexpr //expected-error{{cannot appear multiple times}}
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{ };
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#else
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auto L = []() mutable constexpr {return 0; }; //expected-warning{{is a C++17 extension}}
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auto L2 = []() constexpr { return 0;};//expected-warning{{is a C++17 extension}}
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auto L4 = []() constexpr mutable { return 0; }; //expected-warning{{is a C++17 extension}}
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#endif
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