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Summary: This change implements parse-only acceptance of the optional requires-clause in a template-declaration. Diagnostic testing is added for cases where the grammar is ambiguous with the expectation that the longest token sequence which matches the syntax of a constraint-expression is consumed without backtracking. Reviewers: faisalv, fraggamuffin, rsmith Reviewed By: rsmith Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D10462 llvm-svn: 240611
83 lines
1.5 KiB
C++
83 lines
1.5 KiB
C++
// RUN: %clang_cc1 -std=c++14 -fconcepts-ts -x c++ %s -verify
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// expected-no-diagnostics
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// Test parsing of the optional requires-clause in a template-declaration.
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template <typename T> requires true
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void foo() { }
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template <typename T> requires !0
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struct A {
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void foo();
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struct AA;
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enum E : int;
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static int x;
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template <typename> requires true
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void Mfoo();
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template <typename> requires true
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struct M;
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template <typename> requires true
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static int Mx;
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template <typename TT> requires true
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using MQ = M<TT>;
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};
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template <typename T> requires !0
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void A<T>::foo() { }
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template <typename T> requires !0
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struct A<T>::AA { };
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template <typename T> requires !0
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enum A<T>::E : int { E0 };
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template <typename T> requires !0
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int A<T>::x = 0;
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template <typename T> requires !0
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template <typename> requires true
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void A<T>::Mfoo() { }
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template <typename T> requires !0
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template <typename> requires true
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struct A<T>::M { };
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template <typename T> requires !0
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template <typename> requires true
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int A<T>::Mx = 0;
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template <typename T> requires true
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int x = 0;
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template <typename T> requires true
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using Q = A<T>;
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struct C {
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template <typename> requires true
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void Mfoo();
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template <typename> requires true
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struct M;
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template <typename> requires true
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static int Mx;
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template <typename T> requires true
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using MQ = M<T>;
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};
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template <typename> requires true
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void C::Mfoo() { }
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template <typename> requires true
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struct C::M { };
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template <typename> requires true
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int C::Mx = 0;
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