| 1 | // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
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| 2 | |
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| 3 | // Test parsing + semantic analysis |
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| 4 | template<typename ...Types> struct count_types { |
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| 5 | static const unsigned value = sizeof...(Types); |
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| 6 | }; |
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| 7 | |
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| 8 | template<int ...Values> struct count_ints { |
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| 9 | static const unsigned value = sizeof...(Values); |
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| 10 | }; |
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| 11 | |
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| 12 | // Test instantiation |
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| 13 | int check_types[count_types<short, int, long>::value == 3? 1 : -1]; |
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| 14 | int check_ints[count_ints<1, 2, 3, 4, 5>::value == 5? 1 : -1]; |
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| 15 | |
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| 16 | // Test instantiation involving function parameter packs. |
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| 17 | struct any { |
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| 18 | template<typename T> any(T); |
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| 19 | }; |
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| 20 | |
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| 21 | template<typename ...Inits> |
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| 22 | void init_me(Inits ...inits) { |
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| 23 | any array[sizeof...(inits)] = { inits... }; |
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| 24 | } |
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| 25 | |
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| 26 | template void init_me<int, float, double*>(int, float, double*); |
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| 27 | |
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| 28 | // Test parser and semantic recovery. |
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| 29 | template<int Value> struct count_ints_2 { |
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| 30 | static const unsigned value = sizeof...(Value); // expected-error{{'Value' does not refer to the name of a parameter pack}} |
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| 31 | }; |
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| 32 | |
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| 33 | template<typename ...Types> // expected-note{{parameter pack 'Types' declared here}} |
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| 34 | struct count_types_2 { |
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| 35 | static const unsigned value = sizeof... Type; // expected-error{{missing parentheses around the size of parameter pack 'Type'}} \ |
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| 36 | // expected-error{{Type' does not refer to the name of a parameter pack; did you mean 'Types'?}} |
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| 37 | }; |
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| 38 | |
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| 39 | |
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