forked from OSchip/llvm-project
74 lines
2.9 KiB
C++
74 lines
2.9 KiB
C++
// Support parsing of concepts
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// RUN: %clang_cc1 -std=c++2a -fconcepts-ts -verify %s
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template<typename T> concept C1 = true; // expected-note 2{{previous}}
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template<typename T> concept C1 = true; // expected-error{{redefinition}}
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template<concept T> concept D1 = true;
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// expected-error@-1{{expected template parameter}}
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// expected-error@-2{{concept template parameter list must have at least one parameter; explicit specialization of concepts is not allowed}}
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template<template<typename> concept T> concept D2 = true;
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// expected-error@-1{{expected identifier}}
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// expected-error@-2{{template template parameter requires 'class' after the parameter list}}
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// expected-error@-3{{concept template parameter list must have at least one parameter; explicit specialization of concepts is not allowed}}
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template<typename T> concept C2 = 0.f; // expected-error {{constraint expression must be of type 'bool' but is of type 'float'}}
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struct S1 {
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template<typename T> concept C1 = true; // expected-error {{concept declarations may only appear in global or namespace scope}}
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};
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extern "C++" {
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template<typename T> concept C1 = true; // expected-error{{redefinition}}
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}
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template<typename A>
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template<typename B>
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concept C4 = true; // expected-error {{extraneous template parameter list in concept definition}}
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template<typename T> concept C5 = true; // expected-note {{previous}} expected-note {{previous}}
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int C5; // expected-error {{redefinition}}
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struct C5 {}; // expected-error {{redefinition}}
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struct C6 {}; // expected-note{{previous definition is here}}
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template<typename T> concept C6 = true;
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// expected-error@-1{{redefinition of 'C6' as different kind of symbol}}
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// TODO: Add test to prevent explicit specialization, partial specialization
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// and explicit instantiation of concepts.
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template<typename T, T v>
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struct integral_constant { static constexpr T value = v; };
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namespace N {
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template<typename T> concept C7 = true;
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}
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using N::C7;
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template <bool word> concept C8 = integral_constant<bool, wor>::value;
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// expected-error@-1{{use of undeclared identifier 'wor'; did you mean 'word'?}}
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// expected-note@-2{{'word' declared here}}
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template<typename T> concept bool C9 = true;
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// expected-warning@-1{{ISO C++2a does not permit the 'bool' keyword after 'concept'}}
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template<> concept C10 = false;
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// expected-error@-1{{concept template parameter list must have at least one parameter; explicit specialization of concepts is not allowed}}
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template<> concept C9<int> = false;
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// expected-error@-1{{name defined in concept definition must be an identifier}}
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template<typename T> concept N::C11 = false;
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// expected-error@-1{{name defined in concept definition must be an identifier}}
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class A { };
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// expected-note@-1{{'A' declared here}}
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template<typename T> concept A::C12 = false;
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// expected-error@-1{{expected namespace name}}
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template<typename T> concept operator int = false;
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// expected-error@-1{{name defined in concept definition must be an identifier}}
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