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5 Commits

Author SHA1 Message Date
Jason Merrill 36cbfdb066 Further P0135 refinement. 
* call.c (build_user_type_conversion_1): Consider conversions from
	a single element in an initializer-list.
	(build_temp): Undo early_elide_copy change.
	(build_over_call): Check that we don't try to copy a TARGET_EXPR
	in C++17 mode.  Set user_conv_p here.
	(convert_like_real): Not here.
	(check_self_delegation): Split out from...
	(build_special_member_call): ...here.  Handle C++17 copy elision.
	* cvt.c (early_elide_copy): Remove.
	(ocp_convert): Undo early_elide_copy change.
	* except.c (build_throw): Likewise.
	* init.c (expand_default_init): Likewise.
	* typeck.c (cp_build_modify_expr): Likewise.

From-SVN: r240889
 2016-10-08 12:23:26 -04:00
Jonathan Wakely 64626fcaaa Always qualify std::forward in <variant> 
* include/bits/uses_allocator.h (__uses_allocator_construct): Qualify
	std::forward and ::new. Cast pointer to void*.
	* include/std/variant (_Variant_storage, _Union, _Variant_base)
	(__access, __visit_invoke, variant, visit): Qualify std::forward.
	* testsuite/20_util/variant/compile.cc: Test for ADL problems.

From-SVN: r240344
 2016-09-22 10:56:54 +01:00
Tim Shen c42bc5d73b variant (variant::operator=): Fix assignment on references. 
* libstdc++-v3/include/std/variant (variant::operator=): Fix assignment
	on references.
	* libstdc++-v3/testsuite/20_util/variant/compile.cc: Add test.

From-SVN: r240343
 2016-09-22 08:45:55 +00:00
Tim Shen 41501d1ae7 re PR libstdc++/77641 (std::variant copy-initialization fails for type with non-trivial constexpr ctor) 
PR libstdc++/77641
	* include/std/variant (_Variant_storage::_Variant_storage):
	Change _Variant_storage's union to be default constructible.
	* testsuite/20_util/variant/compile.cc: New test.

From-SVN: r240340
 2016-09-22 03:15:58 +00:00
Tim Shen 197c757cb1 Implement <variant> 
* include/Makefile.am: Add new file std/variant.
	* include/Makefile.in: Generated from Makefile.am.
	* include/bits/enable_special_members.h: Add a tag type to allow
	the construction in non-default constructor.
	* include/bits/uses_allocator.h: Add convenience traits to
	detect constructibility.
	* include/std/variant: Implement <variant>.
	* testsuite/20_util/variant/compile.cc: Compile-time tests.
	* testsuite/20_util/variant/run.cc: Runtime tests.

From-SVN: r239590
 2016-08-18 20:31:26 +00:00