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| // RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s
template<typename T, typename U> struct pair { };
template<typename ...Types> struct tuple { };
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 ExpandIntoFixed {
template<typename T,
typename U,
typename V = pair<T, U>,
typename W = V*>
class X0 { };
template<typename ...Ts>
class X1 {
public:
typedef X0<Ts...> type;
};
static_assert(is_same<X1<int, int>::type,
X0<int, int, pair<int, int>, pair<int, int>*>>::value,
"fails with two default arguments");
static_assert(is_same<X1<int, int, float>::type,
X0<int, int, float, float*>>::value,
"fails with one default argument");
static_assert(is_same<X1<int, int, float, double>::type,
X0<int, int, float, double>>::value,
"fails with no default arguments");
}
namespace ExpandIntoFixedShifted {
template<typename T,
typename U,
typename V = pair<T, U>,
typename W = V*>
class X0 { };
template<typename ...Ts>
class X1 {
public:
typedef X0<char, Ts...> type;
};
static_assert(is_same<X1<int>::type,
X0<char, int, pair<char, int>, pair<char, int>*>>::value,
"fails with two default arguments");
static_assert(is_same<X1<int, float>::type,
X0<char, int, float, float*>>::value,
"fails with one default argument");
static_assert(is_same<X1<int, float, double>::type,
X0<char, int, float, double>>::value,
"fails with no default arguments");
}
namespace Deduction {
template <typename X, typename Y = double> struct Foo {};
template <typename ...Args> tuple<Args...> &foo(Foo<Args...>);
void call_foo(Foo<int, float> foo_if, Foo<int> foo_i) {
tuple<int, float> &t1 = foo(foo_if);
tuple<int, double> &t2 = foo(foo_i);
}
}
namespace PR9021a {
template<typename, typename>
struct A { };
template<typename ...T>
struct B {
A<T...> a1;
};
void test() {
B<int, int> c;
}
}
namespace PR9021b {
template<class, class>
struct t2
{
};
template<template<class...> class M>
struct m
{
template<class... B>
using inner = M<B...>;
};
m<t2> sta2;
}
namespace PartialSpecialization {
template<typename T, typename U, typename V = U>
struct X0; // expected-note 2{{template is declared here}}
template<typename ...Ts>
struct X0<Ts...> { // expected-error {{class template partial specialization is not more specialized than the primary template}}
};
X0<int> x0i; // expected-error{{too few template arguments for class template 'X0'}}
X0<int, float> x0if;
X0<int, float, double> x0ifd;
}
namespace FixedAliasTemplate {
template<typename,typename,typename> struct S {};
template<typename T, typename U> using U = S<T, int, U>; // expected-note 2{{template parameter is declared here}}
template<typename...Ts> U<Ts...> &f(U<Ts...>, Ts...); // expected-error 2{{pack expansion used as argument for non-pack parameter of alias template}}
S<int, int, double> &s1 = f({}, 0, 0.0); // expected-error {{no matching function}}
}
namespace PR18401 {
template<typename... Args> struct foo { };
template<typename T, typename... Args> using bar = foo<T, Args...>; // expected-note 2{{template parameter is declared here}} expected-note {{'bar' declared here}}
template<typename T, typename... Args> using baz = bar<Args..., T>; // expected-error {{pack expansion used as argument for non-pack parameter of alias template}}
// FIXME: We should still record the alias template, but mark it as invalid.
template<typename...T> void f(baz<T...>); // expected-error {{no template named 'baz'; did you mean 'bar'}} expected-error {{pack expansion used as argument for non-pack}}
void g() { f(foo<int, char, double>()); } // expected-error {{no matching function}}
}
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