===================================================================
@@ -69,33 +69,53 @@
}
_GLIBCXX_BEGIN_NAMESPACE_VERSION
- // 20.11.4.3 specialization of common_type (for duration)
- template<typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
- struct common_type<chrono::duration<_Rep1, _Period1>,
- chrono::duration<_Rep2, _Period2>>
+
+ // 20.11.4.3 specialization of common_type (for duration, sfinae-friendly)
+
+ template<typename _CT, typename _Period1, typename _Period2>
+ struct __duration_common_type_wrapper
{
private:
- typedef __static_gcd<_Period1::num, _Period2::num> __gcd_num;
- typedef __static_gcd<_Period1::den, _Period2::den> __gcd_den;
- typedef typename common_type<_Rep1, _Rep2>::type __cr;
+ typedef __static_gcd<_Period1::num, _Period2::num> __gcd_num;
+ typedef __static_gcd<_Period1::den, _Period2::den> __gcd_den;
+ typedef typename _CT::type __cr;
typedef ratio<__gcd_num::value,
- (_Period1::den / __gcd_den::value) * _Period2::den> __r;
-
+ (_Period1::den / __gcd_den::value) * _Period2::den> __r;
public:
- typedef chrono::duration<__cr, __r> type;
+ typedef __success_type<chrono::duration<__cr, __r>> type;
};
- // 20.11.4.3 specialization of common_type (for time_point)
- template<typename _Clock, typename _Dur1, typename _Dur2>
- struct common_type<chrono::time_point<_Clock, _Dur1>,
- chrono::time_point<_Clock, _Dur2>>
+ template<typename _Period1, typename _Period2>
+ struct __duration_common_type_wrapper<__failure_type, _Period1, _Period2>
+ { typedef __failure_type type; };
+
+ template<typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
+ struct common_type<chrono::duration<_Rep1, _Period1>,
+ chrono::duration<_Rep2, _Period2>>
+ : public __duration_common_type_wrapper<typename __member_type_wrapper<
+ common_type<_Rep1, _Rep2>>::type, _Period1, _Period2>::type
+ { };
+
+ // 20.11.4.3 specialization of common_type (for time_point, sfinae-friendly)
+
+ template<typename _CT, typename _Clock>
+ struct __timepoint_common_type_wrapper
{
- private:
- typedef typename common_type<_Dur1, _Dur2>::type __ct;
+ typedef __success_type<chrono::time_point<_Clock, typename _CT::type>>
+ type;
+ };
- public:
- typedef chrono::time_point<_Clock, __ct> type;
- };
+ template<typename _Clock>
+ struct __timepoint_common_type_wrapper<__failure_type, _Clock>
+ { typedef __failure_type type; };
+
+ template<typename _Clock, typename _Duration1, typename _Duration2>
+ struct common_type<chrono::time_point<_Clock, _Duration1>,
+ chrono::time_point<_Clock, _Duration2>>
+ : public __timepoint_common_type_wrapper<typename __member_type_wrapper<
+ common_type<_Duration1, _Duration2>>::type, _Clock>::type
+ { };
+
_GLIBCXX_END_NAMESPACE_VERSION
namespace chrono
===================================================================
@@ -133,6 +133,18 @@
typedef struct { char __arr[2]; } __two;
};
+ // For several sfinae-friendly trait implementations we transport both the
+ // result information (as the member type) and the failure information (no
+ // member type). This is very similar to std::enable_if, but we cannot use
+ // them, because we need to derive from them as an implementation detail.
+
+ template<typename _Tp>
+ struct __success_type
+ { typedef _Tp type; };
+
+ struct __failure_type
+ { };
+
// primary type categories.
template<typename>
@@ -1771,25 +1783,70 @@
struct conditional<false, _Iftrue, _Iffalse>
{ typedef _Iffalse type; };
-
/// common_type
template<typename... _Tp>
struct common_type;
+ // sfinae-friendly common_type implementation:
+
+ struct __do_common_type_impl
+ {
+ template<typename _Tp, typename _Up>
+ static __success_type<typename decay<
+ decltype(true ? std::declval<_Tp>() : std::declval<_Up>())
+ >::type> _S_test(int);
+
+ template<typename, typename>
+ static __failure_type _S_test(...);
+ };
+
+ template<typename _Tp, typename _Up>
+ struct __common_type_impl
+ : private __do_common_type_impl
+ {
+ typedef decltype(_S_test<_Tp, _Up>(0)) type;
+ };
+
+ struct __do_member_type_wrapper
+ {
+ template<typename _Tp>
+ static __success_type<typename _Tp::type> _S_test(int);
+
+ template<typename>
+ static __failure_type _S_test(...);
+ };
+
template<typename _Tp>
+ struct __member_type_wrapper
+ : private __do_member_type_wrapper
+ {
+ typedef decltype(_S_test<_Tp>(0)) type;
+ };
+
+ template<typename _CTp, typename... _Args>
+ struct __expanded_common_type_wrapper
+ {
+ typedef common_type<typename _CTp::type, _Args...> type;
+ };
+
+ template<typename... _Args>
+ struct __expanded_common_type_wrapper<__failure_type, _Args...>
+ { typedef __failure_type type; };
+
+ template<typename _Tp>
struct common_type<_Tp>
{ typedef _Tp type; };
template<typename _Tp, typename _Up>
struct common_type<_Tp, _Up>
- { typedef decltype(true ? declval<_Tp>() : declval<_Up>()) type; };
+ : public __common_type_impl<_Tp, _Up>::type
+ { };
template<typename _Tp, typename _Up, typename... _Vp>
struct common_type<_Tp, _Up, _Vp...>
- {
- typedef typename
- common_type<typename common_type<_Tp, _Up>::type, _Vp...>::type type;
- };
+ : public __expanded_common_type_wrapper<typename __member_type_wrapper<
+ common_type<_Tp, _Up>>::type, _Vp...>::type
+ { };
/// The underlying type of an enum.
template<typename _Tp>
@@ -1818,15 +1875,8 @@
template<typename _Signature>
class result_of;
- // sfinae-friendly result_of implementation. We use enable_if to transport
- // both the result information (as the member type) and the failure
- // information (no member type).
+ // sfinae-friendly result_of implementation:
- template<typename _Tp>
- using __success_type = enable_if<true, _Tp>;
-
- using __failure_type = enable_if<false>;
-
// [func.require] paragraph 1 bullet 1:
struct __result_of_memfun_ref_impl
{
===================================================================
@@ -29,25 +29,29 @@
// Helper types:
struct has_type_impl
{
- template<class T, class = typename T::type>
+ template<typename T, typename = typename T::type>
static std::true_type test(int);
- template<class>
+ template<typename>
static std::false_type test(...);
};
-template<class T>
-struct has_type : decltype(has_type_impl::test<T>(0))
+template<typename T>
+struct has_type : public decltype(has_type_impl::test<T>(0))
{};
-template<class T, class Res>
-struct is_expected_type : std::is_same<typename T::type, Res>
+template<typename T, typename Res>
+struct is_expected_type : public std::is_same<typename T::type, Res>
{};
-template<class T, class Res>
-struct is_type : std::__and_<has_type<T>, is_expected_type<T, Res>>
+template<typename P1, typename P2>
+struct and_ : public std::conditional<P1::value, P2, std::false_type>::type
{};
+template<typename T, typename Res>
+struct is_type : public and_<has_type<T>, is_expected_type<T, Res>>
+{};
+
// Types under inspection:
typedef bool (&PF1)();
@@ -76,18 +80,18 @@
typedef bool (B::*base_func_bool_int)(int) const volatile;
struct ident_functor {
- template<class T>
+ template<typename T>
T operator()(T&& x);
};
-template<class Ret = void>
+template<typename Ret = void>
struct variable_functor {
- template<class... T>
+ template<typename... T>
Ret operator()(T&&...);
};
struct ident_functor_noref {
- template<class T>
+ template<typename T>
typename std::remove_reference<T>::type operator()(T&& x);
};
@@ -136,26 +140,26 @@
bool operator()(std::nullptr_t);
};
-template<class T>
+template<typename T>
struct ImplicitTo {
operator T();
};
-template<class>
+template<typename>
struct never { static const bool value = false; };
-template<class T>
+template<typename T>
struct BrokenTrait {
static_assert(never<T>::value, "Error!");
typedef T type;
};
-template<class T>
+template<typename T>
struct BadSmartPtr : T {
T& operator*() const noexcept(typename BrokenTrait<T>::type());
};
-template<class Ret>
+template<typename Ret>
using FuncEllipses = Ret(...);
static_assert(is_type<std::result_of<S(int)>, short>::value, "Error!");
===================================================================
@@ -23,16 +23,16 @@
#include <type_traits>
#include <string>
-struct eat { template<class T> eat(T const &) {} };
+struct eat { template<typename T> eat(T const &) {} };
struct not_incrementable {};
struct inc {
- template<class T>
+ template<typename T>
auto operator()(T t) const -> decltype(t++)
{ return t++; }
};
-template<class A>
+template<typename A>
typename std::result_of<inc(A)>::type // sfinae here
try_inc(A a) {
return inc()(a);
@@ -43,10 +43,10 @@
return not_incrementable();
}
-template<class>
+template<typename>
struct never { static const bool value = false; };
-template<class T>
+template<typename T>
struct Fail
{
static_assert(never<T>::value, "duh");
@@ -55,16 +55,16 @@
struct Fun
{
- template<class T>
+ template<typename T>
typename Fail<T>::type operator()(T)
{ return 0; }
};
-template<class T>
+template<typename T>
typename std::result_of<Fun(T)>::type foo(T)
{ return 0; }
-template<class>
+template<typename>
int foo(...)
{ return 0; }
===================================================================
@@ -48,5 +48,5 @@
// { dg-error "required from here" "" { target *-*-* } 40 }
// { dg-error "required from here" "" { target *-*-* } 42 }
-// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1601 }
-// { dg-error "declaration of" "" { target *-*-* } 1565 }
+// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1613 }
+// { dg-error "declaration of" "" { target *-*-* } 1577 }
===================================================================
@@ -3,7 +3,7 @@
// { dg-require-cstdint "" }
// 2008-07-31 Chris Fairles <chris.fairles@gmail.com>
-// Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+// Copyright (C) 2008-2012 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
@@ -31,5 +31,5 @@
test_type d;
}
-// { dg-error "rep cannot be a duration" "" { target *-*-* } 225 }
+// { dg-error "rep cannot be a duration" "" { target *-*-* } 245 }
// { dg-error "required from here" "" { target *-*-* } 31 }
===================================================================
@@ -3,7 +3,7 @@
// { dg-require-cstdint "" }
// 2008-07-31 Chris Fairles <chris.fairles@gmail.com>
-// Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+// Copyright (C) 2008-2012 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
@@ -32,5 +32,5 @@
test_type d; // { dg-error "required from here" }
}
-// { dg-error "must be a specialization of ratio" "" { target *-*-* } 226 }
+// { dg-error "must be a specialization of ratio" "" { target *-*-* } 246 }
// { dg-prune-output "not a member" }
===================================================================
@@ -3,7 +3,7 @@
// { dg-require-cstdint "" }
// 2008-07-31 Chris Fairles <chris.fairles@gmail.com>
-// Copyright (C) 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+// Copyright (C) 2008-2012 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
@@ -33,5 +33,5 @@
test_type d;
}
-// { dg-error "period must be positive" "" { target *-*-* } 228 }
+// { dg-error "period must be positive" "" { target *-*-* } 248 }
// { dg-error "required from here" "" { target *-*-* } 33 }
===================================================================
@@ -0,0 +1,66 @@
+// { dg-options "-std=c++11" }
+// { dg-do compile }
+
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <type_traits>
+#include <chrono>
+
+// Helper types:
+struct has_type_impl
+{
+ template<typename T, typename = typename T::type>
+ static std::true_type test(int);
+ template<typename>
+ static std::false_type test(...);
+};
+
+template<typename T>
+struct has_type : public decltype(has_type_impl::test<T>(0))
+{};
+
+template<typename T, typename Expected>
+struct is_expected_type : public std::is_same<typename T::type, Expected>
+{};
+
+template<typename P1, typename P2>
+struct and_ : public std::conditional<P1::value, P2, std::false_type>::type
+{};
+
+template<typename T, typename Expected>
+struct is_type : public and_<has_type<T>, is_expected_type<T, Expected>>
+{};
+
+// Inspection types:
+
+typedef std::chrono::duration<int, std::nano> din;
+typedef std::chrono::duration<double, std::nano> ddn;
+typedef std::chrono::duration<int, std::milli> dim;
+
+static_assert(is_type<std::common_type<din, din>, din>(), "");
+static_assert(is_type<std::common_type<din, din, din>, din>(), "");
+
+static_assert(is_type<std::common_type<din, ddn>, ddn>(), "");
+static_assert(is_type<std::common_type<din, din, ddn>, ddn>(), "");
+static_assert(is_type<std::common_type<din, ddn>, ddn>(), "");
+static_assert(is_type<std::common_type<ddn, din, din>, ddn>(), "");
+
+static_assert(!has_type<std::common_type<din, int>>(), "");
+static_assert(!has_type<std::common_type<din, din, int>>(), "");
+static_assert(!has_type<std::common_type<int, din, din>>(), "");
+
===================================================================
@@ -48,5 +48,5 @@
// { dg-error "required from here" "" { target *-*-* } 40 }
// { dg-error "required from here" "" { target *-*-* } 42 }
-// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1519 }
-// { dg-error "declaration of" "" { target *-*-* } 1483 }
+// { dg-error "invalid use of incomplete type" "" { target *-*-* } 1531 }
+// { dg-error "declaration of" "" { target *-*-* } 1495 }
===================================================================
@@ -1,6 +1,6 @@
// { dg-options "-std=gnu++0x" }
//
-// Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+// Copyright (C) 2008-2012 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
@@ -105,7 +105,7 @@
COMMON_TYPE_TEST_ALL_2(int, int, int, 1);
COMMON_TYPE_TEST_ALL_2(int, double, double, 2);
COMMON_TYPE_TEST_2(NO_CV, A, A, A, 3);
- COMMON_TYPE_TEST_2(const, A, A, const A, 4);
+ COMMON_TYPE_TEST_2(const, A, A, A, 4);
COMMON_TYPE_TEST_2(NO_CV, B, A, A, 5);
}
===================================================================
@@ -0,0 +1,341 @@
+// { dg-options "-std=c++11" }
+// { dg-do compile }
+
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <type_traits>
+#include <initializer_list>
+
+//TODO: Uncomment this once gcc bug 53000 has been resolved:
+//#define HAS_53000_FIXED
+
+// Helper types:
+struct has_type_impl
+{
+ template<typename T, typename = typename T::type>
+ static std::true_type test(int);
+ template<typename>
+ static std::false_type test(...);
+};
+
+template<typename T>
+struct has_type : public decltype(has_type_impl::test<T>(0))
+{};
+
+template<typename T, typename Expected>
+struct is_expected_type : public std::is_same<typename T::type, Expected>
+{};
+
+template<typename P1, typename P2>
+struct and_ : public std::conditional<P1::value, P2, std::false_type>::type
+{};
+
+template<typename T, typename Expected>
+struct is_type : public and_<has_type<T>, is_expected_type<T, Expected>>
+{};
+
+// Inspection types:
+
+struct S {};
+
+struct B {};
+struct D : B {};
+
+struct F1 { operator void*(); };
+struct F2 { operator void*(); };
+
+struct G1 { operator const void*(); };
+struct G2 { operator volatile void*(); };
+
+template<typename T>
+struct ImplicitTo
+{
+ operator T();
+};
+
+template<typename T>
+struct ExplicitTo
+{
+ explicit operator T();
+};
+
+template<typename T>
+struct PrivateImplicitTo
+{
+private:
+ operator T();
+};
+
+auto lmd1 = [](int, double) {};
+auto lmd2 = [](int, double) {};
+
+struct Abstract
+{
+ virtual ~Abstract() = 0;
+};
+
+enum class ScEn;
+
+enum UnscEn : int;
+
+struct Ukn;
+
+union U
+{
+ int i;
+};
+
+union U2
+{
+ long i;
+};
+
+union UConv1
+{
+ operator Abstract*();
+};
+
+union UConv2
+{
+ operator Abstract*();
+};
+
+struct X1 {};
+struct X2 {};
+struct RX12 {};
+struct RX21 {};
+struct Y1 {};
+struct Y2 {};
+struct Y3 {};
+struct Y4 {};
+
+namespace std {
+
+ template<>
+ struct common_type<X1, X2>
+ {
+ typedef RX12 type;
+ };
+
+ template<>
+ struct common_type<X2, X1>
+ {
+ typedef RX21 type;
+ };
+
+ template<>
+ struct common_type<RX12, X1>
+ {
+ typedef Y1 type;
+ };
+
+ template<>
+ struct common_type<X1, RX12>
+ {
+ typedef Y2 type;
+ };
+
+ template<>
+ struct common_type<RX21, X1>
+ {
+ typedef Y3 type;
+ };
+
+ template<>
+ struct common_type<X1, RX21>
+ {
+ typedef Y4 type;
+ };
+}
+
+static_assert(is_type<std::common_type<int, int>, int>(), "");
+static_assert(is_type<std::common_type<ScEn, ScEn>, ScEn>(), "");
+static_assert(is_type<std::common_type<UnscEn, UnscEn>, UnscEn>(), "");
+static_assert(is_type<std::common_type<int, int>, int>(), "");
+static_assert(is_type<std::common_type<UnscEn, int>, int>(), "");
+static_assert(is_type<std::common_type<int, int, int>, int>(), "");
+static_assert(is_type<std::common_type<int, int, int, int>, int>(), "");
+static_assert(is_type<std::common_type<int, int, int, int, int>, int>(), "");
+static_assert(is_type<std::common_type<S, S>, S>(), "");
+static_assert(is_type<std::common_type<const S, const S>, S>(), "");
+static_assert(is_type<std::common_type<std::initializer_list<int>,
+ std::initializer_list<int>>, std::initializer_list<int>>(), "");
+static_assert(is_type<std::common_type<B, D>, B>(), "");
+static_assert(is_type<std::common_type<D, B>, B>(), "");
+static_assert(is_type<std::common_type<F1, F2>, void*>(), "");
+static_assert(is_type<std::common_type<F2, F1>, void*>(), "");
+static_assert(is_type<std::common_type<G1, G2>, const volatile void*>(), "");
+static_assert(is_type<std::common_type<G2, G1>, const volatile void*>(), "");
+static_assert(is_type<std::common_type<int*, const volatile int*>,
+ const volatile int*>(), "");
+static_assert(is_type<std::common_type<void*, const volatile int*>,
+ const volatile void*>(), "");
+static_assert(is_type<std::common_type<void, void>, void>(), "");
+static_assert(is_type<std::common_type<const void, const void>, void>(), "");
+static_assert(is_type<std::common_type<int&, int&&>, int>(), "");
+static_assert(is_type<std::common_type<int&, int&>, int>(), "");
+static_assert(is_type<std::common_type<int&&, int&&>, int>(), "");
+static_assert(is_type<std::common_type<U&, const U&&>, U>(), "");
+static_assert(is_type<std::common_type<U&, U&>, U>(), "");
+static_assert(is_type<std::common_type<U&&, U&&>, U>(), "");
+static_assert(is_type<std::common_type<int B::*, int D::*>, int D::*>(), "");
+static_assert(is_type<std::common_type<int D::*, int B::*>, int D::*>(), "");
+static_assert(is_type<std::common_type<const int B::*, volatile int D::*>,
+ const volatile int D::*>(), "");
+static_assert(is_type<std::common_type<int (B::*)(), int (D::*)()>,
+ int (D::*)()>(), "");
+static_assert(is_type<std::common_type<int (B::*)() const, int (D::*)() const>,
+ int (D::*)() const>(), "");
+static_assert(is_type<std::common_type<int[3], int[3]>, int*>(), "");
+static_assert(is_type<std::common_type<int[1], const int[3]>,
+ const int*>(), "");
+static_assert(is_type<std::common_type<void(), void()>, void(*)()>(), "");
+static_assert(is_type<std::common_type<void(&)(), void(&)()>, void(*)()>(), "");
+static_assert(is_type<std::common_type<void(&)(), void(&&)()>,
+ void(*)()>(), "");
+static_assert(is_type<std::common_type<void(&&)(), void(&)()>,
+ void(*)()>(), "");
+static_assert(is_type<std::common_type<void(&&)(), void(&&)()>,
+ void(*)()>(), "");
+static_assert(is_type<std::common_type<ImplicitTo<int>, int>, int>(), "");
+static_assert(is_type<std::common_type<ImplicitTo<int>, ImplicitTo<int>>,
+ ImplicitTo<int>>(), "");
+static_assert(is_type<std::common_type<ImplicitTo<int>, int,
+ ImplicitTo<int>>, int>(), "");
+static_assert(is_type<std::common_type<ExplicitTo<int>, ExplicitTo<int>>,
+ ExplicitTo<int>>(), "");
+static_assert(is_type<std::common_type<decltype(lmd1), decltype(lmd1)>,
+ decltype(lmd1)>(), "");
+static_assert(is_type<std::common_type<decltype(lmd1)&, decltype(lmd1)&>,
+ decltype(lmd1)>(), "");
+static_assert(is_type<std::common_type<decltype(lmd1)&, decltype(lmd2)&>,
+ void(*)(int, double)>(), "");
+static_assert(is_type<std::common_type<decltype(nullptr), void*>, void*>(), "");
+static_assert(is_type<std::common_type<decltype(nullptr), int*>, int*>(), "");
+static_assert(is_type<std::common_type<const decltype(nullptr)&, int*>,
+ int*>(), "");
+static_assert(is_type<std::common_type<decltype(nullptr), const volatile int*>,
+ const volatile int*>(), "");
+static_assert(is_type<std::common_type<decltype(nullptr), int (B::*)()>,
+ int (B::*)()>(), "");
+static_assert(is_type<std::common_type<decltype(nullptr), int (B::*)() const>,
+ int (B::*)() const>(), "");
+static_assert(is_type<std::common_type<decltype(nullptr), const int B::*>,
+ const int B::*>(), "");
+static_assert(is_type<std::common_type<Abstract&, Abstract&>, Abstract>(), "");
+static_assert(is_type<std::common_type<Ukn&, Ukn&>, Ukn>(), "");
+static_assert(is_type<std::common_type<ImplicitTo<B&>, B&>, B>(), "");
+static_assert(is_type<std::common_type<ImplicitTo<B&>&, B&&>, B>(), "");
+static_assert(is_type<std::common_type<UConv1, const Abstract*&>,
+ const Abstract*>(), "");
+static_assert(is_type<std::common_type<UConv1, UConv2>, Abstract*>(), "");
+static_assert(is_type<std::common_type<UConv1&, UConv2&>, Abstract*>(), "");
+
+#ifdef HAS_53000_FIXED
+static_assert(is_type<std::common_type<Abstract&&, Abstract&&>,
+ Abstract>(), "");
+static_assert(is_type<std::common_type<const Abstract&&,
+ volatile Abstract&&>, Abstract>(), "");
+static_assert(is_type<std::common_type<Ukn&&, Ukn&&>, Ukn>(), "");
+static_assert(is_type<std::common_type<const Ukn&&, volatile Ukn&&>,
+ Ukn>(), "");
+#endif
+
+static_assert(is_type<std::common_type<X1, X2>, RX12>(), "");
+static_assert(is_type<std::common_type<X2, X1>, RX21>(), "");
+
+static_assert(is_type<std::common_type<X1, X2, X1>, Y1>(), "");
+static_assert(is_type<std::common_type<X2, X1, X1>, Y3>(), "");
+
+static_assert(is_type<std::common_type<X1, X1, X2>, RX12>(), "");
+static_assert(is_type<std::common_type<X1, X1, X2, X1>, Y1>(), "");
+
+static_assert(!has_type<std::common_type<>>(), "");
+static_assert(!has_type<std::common_type<int, S>>(), "");
+static_assert(!has_type<std::common_type<U, S>>(), "");
+static_assert(!has_type<std::common_type<U, U2>>(), "");
+static_assert(!has_type<std::common_type<const ImplicitTo<int>, int>>(), "");
+static_assert(!has_type<std::common_type<PrivateImplicitTo<int>, int>>(), "");
+static_assert(!has_type<std::common_type<const PrivateImplicitTo<int>,
+ int>>(), "");
+static_assert(!has_type<std::common_type<int, Ukn>>(), "");
+static_assert(!has_type<std::common_type<int, Abstract>>(), "");
+static_assert(!has_type<std::common_type<Ukn, Abstract>>(), "");
+static_assert(!has_type<std::common_type<int, void>>(), "");
+static_assert(!has_type<std::common_type<int, const volatile void>>(), "");
+static_assert(!has_type<std::common_type<Abstract, void>>(), "");
+static_assert(!has_type<std::common_type<Ukn, void>>(), "");
+static_assert(!has_type<std::common_type<int[4], void>>(), "");
+static_assert(!has_type<std::common_type<ScEn, void>>(), "");
+static_assert(!has_type<std::common_type<UnscEn, void>>(), "");
+static_assert(!has_type<std::common_type<U, void>>(), "");
+static_assert(!has_type<std::common_type<std::initializer_list<int>,
+ void>>(), "");
+static_assert(!has_type<std::common_type<int, int, int, S>>(), "");
+static_assert(!has_type<std::common_type<int, int, S, int>>(), "");
+static_assert(!has_type<std::common_type<int, S, int, int>>(), "");
+static_assert(!has_type<std::common_type<S, int, int, int>>(), "");
+static_assert(!has_type<std::common_type<int, int, void, int, int>>(), "");
+static_assert(!has_type<std::common_type<B, S>>(), "");
+static_assert(!has_type<std::common_type<int, B, S>>(), "");
+static_assert(!has_type<std::common_type<B, int, S>>(), "");
+static_assert(!has_type<std::common_type<B, S, int>>(), "");
+static_assert(!has_type<std::common_type<int*, double*>>(), "");
+static_assert(!has_type<std::common_type<void*, void(*)(...)>>(), "");
+static_assert(!has_type<std::common_type<void(*)(), void(*)(...)>>(), "");
+static_assert(!has_type<std::common_type<void(*)(), void(S::*)()>>(), "");
+static_assert(!has_type<std::common_type<void(S::*)() const,
+ void(S::*)()>>(), "");
+static_assert(!has_type<std::common_type<int S::*, long S::*>>(), "");
+static_assert(!has_type<std::common_type<int S::*, void(S::*)()>>(), "");
+static_assert(!has_type<std::common_type<int (B::*)(),
+ int (D::*)() const>>(), "");
+static_assert(!has_type<std::common_type<int (B::*)() const,
+ int (D::*)()>>(), "");
+static_assert(!has_type<std::common_type<int, ExplicitTo<int>>>(), "");
+static_assert(!has_type<std::common_type<ImplicitTo<int>,
+ ExplicitTo<int>>>(), "");
+static_assert(!has_type<std::common_type<ScEn, int>>(), "");
+static_assert(!has_type<std::common_type<ScEn, UnscEn>>(), "");
+static_assert(!has_type<std::common_type<U, S, Abstract, void, D,
+ int (B::*)(), int[5]>>(), "");
+static_assert(!has_type<std::common_type<UConv1, Abstract&&>>(), "");
+static_assert(!has_type<std::common_type<std::initializer_list<int>,
+ std::initializer_list<long>>>(), "");
+
+void test(int i)
+{
+ auto local_lmd1 = [=](int, double) { return i + i; };
+ auto local_lmd2 = [=](int, double) { return i - i; };
+
+ static_assert(is_type<std::common_type<decltype(local_lmd1),
+ decltype(local_lmd1)>, decltype(local_lmd1)>(), "");
+ static_assert(is_type<std::common_type<decltype(local_lmd1)&,
+ decltype(local_lmd1)>, decltype(local_lmd1)>(), "");
+ static_assert(is_type<std::common_type<decltype(local_lmd1)&,
+ decltype(local_lmd1)&>, decltype(local_lmd1)>(), "");
+
+ static_assert(!has_type<std::common_type<decltype(local_lmd1),
+ decltype(lmd1)>>(), "");
+ static_assert(!has_type<std::common_type<decltype(local_lmd1)&,
+ decltype(lmd1)&>>(), "");
+ static_assert(!has_type<std::common_type<decltype(local_lmd1),
+ decltype(local_lmd2)>>(), "");
+ static_assert(!has_type<std::common_type<decltype(local_lmd1)&,
+ decltype(local_lmd2)&>>(), "");
+}
===================================================================
@@ -0,0 +1,51 @@
+// { dg-options "-std=c++11" }
+// { dg-do compile }
+
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <type_traits>
+#include <array>
+#include <utility>
+
+template<typename... Args>
+constexpr
+std::array<typename std::common_type<Args...>::type, sizeof...(Args)>
+make_array(Args&&... args) // { dg-error "invalid use" }
+{
+ typedef typename std::common_type<Args...>::type CT;
+ return std::array<CT, sizeof...(Args)>{static_cast<CT>
+ (std::forward<Args>(args))...};
+}
+
+void test01()
+{
+ constexpr auto a1 = make_array(0);
+ constexpr auto a2 = make_array(0, 1.2);
+ constexpr auto a3 = make_array(5, true, 3.1415f, 'c');
+
+ static_assert(std::is_same<decltype(a1), const std::array<int, 1>>(), "");
+ static_assert(std::is_same<decltype(a2), const std::array<double, 2>>(), "");
+ static_assert(std::is_same<decltype(a3), const std::array<float, 4>>(), "");
+}
+
+void test02()
+{
+ make_array(); // { dg-error "no matching function" }
+}
+// { dg-prune-output "substitution" }
+// { dg-prune-output "include" }
===================================================================
@@ -19,7 +19,7 @@
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
-// { dg-error "static assertion failed" "" { target *-*-* } 1812 }
+// { dg-error "static assertion failed" "" { target *-*-* } 1869 }
#include <utility>