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// 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 can not 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'}}
}
}
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