Author: ericwf
Date: Sun Aug 14 20:51:54 2016
New Revision: 278643
URL: http://llvm.org/viewvc/llvm-project?rev=278643&view=rev
Log:
Check in SFINAE base class for use in optional/variant
Modified:
libcxx/trunk/include/__tuple
Modified: libcxx/trunk/include/__tuple
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/__tuple?rev=278643&r1=278642&r2=278643&view=diff
==============================================================================
--- libcxx/trunk/include/__tuple (original)
+++ libcxx/trunk/include/__tuple Sun Aug 14 20:51:54 2016
@@ -479,6 +479,63 @@ struct _LIBCPP_TYPE_VIS __check_tuple_co
};
#endif
+#if _LIBCPP_STD_VER > 14
+
+template <bool _CanCopy, bool _CanMove>
+struct __sfinae_ctor_base {};
+template <>
+struct __sfinae_ctor_base<false, false> {
+ __sfinae_ctor_base() = default;
+ __sfinae_ctor_base(__sfinae_ctor_base const&) = delete;
+ __sfinae_ctor_base(__sfinae_ctor_base &&) = delete;
+ __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default;
+ __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default;
+};
+template <>
+struct __sfinae_ctor_base<true, false> {
+ __sfinae_ctor_base() = default;
+ __sfinae_ctor_base(__sfinae_ctor_base const&) = default;
+ __sfinae_ctor_base(__sfinae_ctor_base &&) = delete;
+ __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default;
+ __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default;
+};
+template <>
+struct __sfinae_ctor_base<false, true> {
+ __sfinae_ctor_base() = default;
+ __sfinae_ctor_base(__sfinae_ctor_base const&) = delete;
+ __sfinae_ctor_base(__sfinae_ctor_base &&) = default;
+ __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default;
+ __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default;
+};
+
+template <bool _CanCopy, bool _CanMove>
+struct __sfinae_assign_base {};
+template <>
+struct __sfinae_assign_base<false, false> {
+ __sfinae_assign_base() = default;
+ __sfinae_assign_base(__sfinae_assign_base const&) = default;
+ __sfinae_assign_base(__sfinae_assign_base &&) = default;
+ __sfinae_assign_base& operator=(__sfinae_assign_base const&) = delete;
+ __sfinae_assign_base& operator=(__sfinae_assign_base&&) = delete;
+};
+template <>
+struct __sfinae_assign_base<true, false> {
+ __sfinae_assign_base() = default;
+ __sfinae_assign_base(__sfinae_assign_base const&) = default;
+ __sfinae_assign_base(__sfinae_assign_base &&) = default;
+ __sfinae_assign_base& operator=(__sfinae_assign_base const&) = default;
+ __sfinae_assign_base& operator=(__sfinae_assign_base&&) = delete;
+};
+template <>
+struct __sfinae_assign_base<false, true> {
+ __sfinae_assign_base() = default;
+ __sfinae_assign_base(__sfinae_assign_base const&) = default;
+ __sfinae_assign_base(__sfinae_assign_base &&) = default;
+ __sfinae_assign_base& operator=(__sfinae_assign_base const&) = delete;
+ __sfinae_assign_base& operator=(__sfinae_assign_base&&) = default;
+};
+#endif // _LIBCPP_STD_VER > 14
+
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___TUPLE
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