Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp0x/reference_collapsing.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
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// I, Howard Hinnant, hereby place this code in the public domain. // Test the reference collapsing rules. Note that there are recent differences // for how cv-qualifications are applied to reference types. 7.1.3, 14.3.1 // { dg-do compile { target c++11 } } template <bool> struct sa; template <> struct sa<true> {}; template <class T, T v> struct integral_constant { static const T value = v; typedef T value_type; typedef integral_constant<T, v> type; }; typedef integral_constant<bool, true> true_type; typedef integral_constant<bool, false> false_type; template <class T> struct is_lvalue_reference : public integral_constant<bool, false> {}; template <class T> struct is_lvalue_reference<T&> : public integral_constant<bool, true> {}; template <class T> struct is_rvalue_reference : public integral_constant<bool, false> {}; template <class T> struct is_rvalue_reference<T&&> : public integral_constant<bool, true> {}; template <class T> struct remove_reference {typedef T type;}; template <class T> struct remove_reference<T&> {typedef T type;}; template <class T> struct remove_reference<T&&> {typedef T type;}; template <class T> struct is_const : public integral_constant<bool, false> {}; template <class T> struct is_const<T const> : public integral_constant<bool, true> {}; template <class T> struct is_volatile : public integral_constant<bool, false> {}; template <class T> struct is_volatile<T volatile> : public integral_constant<bool, true> {}; struct A {}; typedef A& Alref; typedef const A& cAlref; typedef volatile A& vAlref; typedef const volatile A& cvAlref; typedef A&& Arref; typedef const A&& cArref; typedef volatile A&& vArref; typedef const volatile A&& cvArref; template <class T, bool is_lvalue_ref, bool is_rvalue_ref, bool s_const, bool s_volatile> void test() { sa<is_lvalue_reference<T>::value == is_lvalue_ref> t1; sa<is_rvalue_reference<T>::value == is_rvalue_ref> t2; sa<is_const <typename remove_reference<T>::type>::value == s_const> t3; sa<is_volatile<typename remove_reference<T>::type>::value == s_volatile> t4; sa<is_const <typename remove_reference<const T>::type>::value == s_const > t5; sa<is_volatile<typename remove_reference< volatile T>::type>::value == s_volatile> t6; } int main() { // sanity check test< A&, true, false, false, false>(); test<const A&, true, false, true, false>(); test< volatile A&, true, false, false, true>(); test<const volatile A&, true, false, true, true>(); test< A&&, false, true, false, false>(); test<const A&&, false, true, true, false>(); test< volatile A&&, false, true, false, true>(); test<const volatile A&&, false, true, true, true>(); // lvalue reference test // Alref test< Alref&, true, false, false, false>(); test<const Alref&, true, false, false, false>(); test< volatile Alref&, true, false, false, false>(); test<const volatile Alref&, true, false, false, false>(); // cAlref test< cAlref&, true, false, true, false>(); test<const cAlref&, true, false, true, false>(); test< volatile cAlref&, true, false, true, false>(); test<const volatile cAlref&, true, false, true, false>(); // vAlref test< vAlref&, true, false, false, true>(); test<const vAlref&, true, false, false, true>(); test< volatile vAlref&, true, false, false, true>(); test<const volatile vAlref&, true, false, false, true>(); // cvAlref test< cvAlref&, true, false, true, true>(); test<const cvAlref&, true, false, true, true>(); test< volatile cvAlref&, true, false, true, true>(); test<const volatile cvAlref&, true, false, true, true>(); // Arref test< Arref&, true, false, false, false>(); test<const Arref&, true, false, false, false>(); test< volatile Arref&, true, false, false, false>(); test<const volatile Arref&, true, false, false, false>(); // cArref test< cArref&, true, false, true, false>(); test<const cArref&, true, false, true, false>(); test< volatile cArref&, true, false, true, false>(); test<const volatile cArref&, true, false, true, false>(); // vArref test< vArref&, true, false, false, true>(); test<const vArref&, true, false, false, true>(); test< volatile vArref&, true, false, false, true>(); test<const volatile vArref&, true, false, false, true>(); // vArref test< cvArref&, true, false, true, true>(); test<const cvArref&, true, false, true, true>(); test< volatile cvArref&, true, false, true, true>(); test<const volatile cvArref&, true, false, true, true>(); // rvalue reference test // Alref test< Alref&&, true, false, false, false>(); test<const Alref&&, true, false, false, false>(); test< volatile Alref&&, true, false, false, false>(); test<const volatile Alref&&, true, false, false, false>(); // cAlref test< cAlref&&, true, false, true, false>(); test<const cAlref&&, true, false, true, false>(); test< volatile cAlref&&, true, false, true, false>(); test<const volatile cAlref&&, true, false, true, false>(); // vAlref test< vAlref&&, true, false, false, true>(); test<const vAlref&&, true, false, false, true>(); test< volatile vAlref&&, true, false, false, true>(); test<const volatile vAlref&&, true, false, false, true>(); // cvAlref test< cvAlref&&, true, false, true, true>(); test<const cvAlref&&, true, false, true, true>(); test< volatile cvAlref&&, true, false, true, true>(); test<const volatile cvAlref&&, true, false, true, true>(); // Arref test< Arref&&, false, true, false, false>(); test<const Arref&&, false, true, false, false>(); test< volatile Arref&&, false, true, false, false>(); test<const volatile Arref&&, false, true, false, false>(); // cArref test< cArref&&, false, true, true, false>(); test<const cArref&&, false, true, true, false>(); test< volatile cArref&&, false, true, true, false>(); test<const volatile cArref&&, false, true, true, false>(); // vArref test< vArref&&, false, true, false, true>(); test<const vArref&&, false, true, false, true>(); test< volatile vArref&&, false, true, false, true>(); test<const volatile vArref&&, false, true, false, true>(); // cvArref test< cvArref&&, false, true, true, true>(); test<const cvArref&&, false, true, true, true>(); test< volatile cvArref&&, false, true, true, true>(); test<const volatile cvArref&&, false, true, true, true>(); return 0; }