| // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
| |
| template<typename ...Types> struct tuple; |
| template<unsigned> struct unsigned_c; |
| |
| template<typename T, typename U> |
| struct is_same { |
| static const bool value = false; |
| }; |
| |
| template<typename T> |
| struct is_same<T, T> { |
| static const bool value = true; |
| }; |
| |
| namespace PackExpansionNotAtEnd { |
| template<typename T, typename U> |
| struct tuple_same_with_int { |
| static const bool value = false; |
| }; |
| |
| template<typename ...Types> |
| struct tuple_same_with_int<tuple<Types...>, tuple<Types..., int>> { |
| static const bool value = true; |
| }; |
| |
| int tuple_same_with_int_1[tuple_same_with_int<tuple<int, float, double>, |
| tuple<int, float, double, int> |
| >::value? 1 : -1]; |
| |
| template<typename ... Types> struct UselessPartialSpec; |
| |
| template<typename ... Types, // expected-note{{non-deducible template parameter 'Types'}} |
| typename Tail> // expected-note{{non-deducible template parameter 'Tail'}} |
| struct UselessPartialSpec<Types..., Tail>; // expected-warning{{class template partial specialization contains template parameters that cannot be deduced; this partial specialization will never be used}} |
| } |
| |
| namespace DeduceNonTypeTemplateArgsInArray { |
| template<typename ...ArrayTypes> |
| struct split_arrays; |
| |
| template<typename ...ElementTypes, unsigned ...Bounds> |
| struct split_arrays<ElementTypes[Bounds]...> { |
| typedef tuple<ElementTypes...> element_types; |
| |
| // FIXME: Would like to have unsigned_tuple<Bounds...> here. |
| typedef tuple<unsigned_c<Bounds>...> bounds_types; |
| }; |
| |
| int check1[is_same<split_arrays<int[1], float[2], double[3]>::element_types, |
| tuple<int, float, double>>::value? 1 : -1]; |
| int check2[is_same<split_arrays<int[1], float[2], double[3]>::bounds_types, |
| tuple<unsigned_c<1>, unsigned_c<2>, unsigned_c<3>> |
| >::value? 1 : -1]; |
| } |
| |
| namespace DeduceWithDefaultArgs { |
| template<template<typename...> class Container> void f(Container<int>); // expected-note {{substitution failure [with Container = X]}} |
| template<typename, typename = int> struct X {}; |
| void g() { |
| // OK, use default argument for the second template parameter. |
| f(X<int>{}); |
| f(X<int, int>{}); |
| |
| // Not OK. |
| f(X<int, double>{}); // expected-error {{no matching function for call to 'f'}} |
| } |
| } |