| 1 | // RUN: %clang_cc1 -std=c++14 -fconcepts-ts -x c++ %s -verify |
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| 2 | |
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| 3 | // Test parsing of constraint-expressions in cases where the grammar is |
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| 4 | // ambiguous with the expectation that the longest token sequence which matches |
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| 5 | // the syntax is consumed without backtracking. |
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| 6 | |
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| 7 | // type-specifier-seq in conversion-type-id |
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| 8 | template <typename T> requires (bool)&T::operator short |
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| 9 | unsigned int foo(); // expected-error {{C++ requires a type specifier for all declarations}} |
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| 10 | |
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| 11 | // type-specifier-seq in new-type-id |
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| 12 | template <typename T> requires (bool)sizeof new (T::f()) short |
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| 13 | unsigned int bar(); // expected-error {{C++ requires a type specifier for all declarations}} |
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| 14 | |
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| 15 | template<typename T> requires (bool)sizeof new (T::f()) unsigned // expected-error {{'struct' cannot be signed or unsigned}} |
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| 16 | struct X { }; // expected-error {{'X' cannot be defined in a type specifier}} |
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| 17 | |
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| 18 | // C-style cast |
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| 19 | // of function call on function-style cast |
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| 20 | template <typename T> requires (bool(T())) |
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| 21 | T (*fp)(); // expected-error {{use of undeclared identifier 'fp'}} |
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| 22 | |
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| 23 | // function-style cast |
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| 24 | // as the callee in a function call |
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| 25 | struct A { |
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| 26 | static int t; |
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| 27 | template <typename T> requires bool(T()) |
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| 28 | (A(T (&t))) { } // expected-error {{called object type 'bool' is not a function or function pointer}} |
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| 29 | }; |
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| 30 | |
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