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from ead5d40 Revert Add <optional>. Will recommit with better commit message new 35ce485 Implement N4606 optional

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Summary of changes: .gitignore | 3 + include/__config | 4 + include/optional | 1313 ++++++++++++++++++++ include/type_traits | 4 +- src/optional.cpp | 12 +- .../optional.object.assign/copy.pass.cpp | 81 ++ .../optional.object.assign/move.pass.cpp | 78 ++ .../optional.object.ctor/copy.pass.cpp | 59 + .../optional.object.ctor/move.pass.cpp | 60 + .../optional.object/special_member_gen.pass.cpp | 66 + test/libcxx/utilities/optional/version.pass.cpp | 20 + .../is_nothrow_swappable_with.pass.cpp | 2 +- .../optional.bad_optional_access/default.pass.cpp | 23 + .../optional.bad_optional_access/derive.pass.cpp | 25 + .../optional/optional.comp_with_t/equal.pass.cpp | 53 + .../optional/optional.comp_with_t/greater.pass.cpp | 55 + .../optional.comp_with_t/greater_equal.pass.cpp | 55 + .../optional.comp_with_t/less_equal.pass.cpp | 55 + .../optional.comp_with_t/less_than.pass.cpp | 55 + .../optional.comp_with_t/not_equal.pass.cpp | 53 + .../utilities/optional/optional.hash/hash.pass.cpp | 48 + .../optional/optional.nullops/equal.pass.cpp | 39 + .../optional/optional.nullops/greater.pass.cpp | 39 + .../optional.nullops/greater_equal.pass.cpp | 39 + .../optional/optional.nullops/less_equal.pass.cpp | 40 + .../optional/optional.nullops/less_than.pass.cpp | 39 + .../optional/optional.nullops/not_equal.pass.cpp | 39 + .../not_brace_initializable.fail.cpp | 25 + .../optional/optional.nullopt/nullopt_t.pass.cpp | 38 + .../optional.object.assign/assign_value.pass.cpp | 261 ++++ .../const_optional_U.pass.cpp | 254 ++++ .../optional.object.assign/copy.pass.cpp | 102 ++ .../optional.object.assign/emplace.pass.cpp | 237 ++++ .../emplace_initializer_list.pass.cpp | 113 ++ .../optional.object.assign/move.pass.cpp | 174 +++ .../optional.object.assign/nullopt_t.pass.cpp | 67 + .../optional.object.assign/optional_U.pass.cpp | 268 ++++ .../optional.object.ctor/U.pass.cpp | 137 ++ .../optional.object.ctor/const_T.pass.cpp | 123 ++ .../optional.object.ctor/const_optional_U.pass.cpp | 134 ++ .../optional.object.ctor/copy.pass.cpp | 150 +++ .../optional.object.ctor/default.pass.cpp | 81 ++ .../explicit_const_optional_U.pass.cpp | 121 ++ .../explicit_optional_U.pass.cpp | 84 ++ .../optional.object.ctor/in_place_t.pass.cpp | 144 +++ .../optional.object.ctor/initializer_list.pass.cpp | 116 ++ .../optional.object.ctor/move.pass.cpp | 196 +++ .../optional.object.ctor/nullopt_t.pass.cpp | 73 ++ .../optional.object.ctor/optional_U.pass.cpp | 93 ++ .../optional.object.ctor/rvalue_T.pass.cpp | 148 +++ .../optional.object.dtor/dtor.pass.cpp | 68 + .../optional.object.mod/reset.pass.cpp | 61 + .../optional.object.observe/bool.pass.cpp | 37 + .../optional.object.observe/dereference.pass.cpp | 73 ++ .../dereference_const.pass.cpp | 69 + .../dereference_const_rvalue.pass.cpp | 69 + .../dereference_rvalue.pass.cpp | 73 ++ .../optional.object.observe/has_value.pass.cpp | 37 + .../optional.object.observe/op_arrow.pass.cpp | 72 ++ .../op_arrow_const.pass.cpp | 76 ++ .../optional.object.observe/value.pass.cpp | 73 ++ .../optional.object.observe/value_const.fail.cpp | 33 + .../optional.object.observe/value_const.pass.cpp | 64 + .../value_const_rvalue.pass.cpp | 64 + .../optional.object.observe/value_or.pass.cpp | 68 + .../value_or_const.pass.cpp | 77 ++ .../optional.object.observe/value_rvalue.pass.cpp | 72 ++ .../optional.object.swap/swap.pass.cpp | 306 +++++ .../optional_requires_destructible_object.fail.cpp | 50 + .../optional.object/special_member_gen.pass.cpp | 74 ++ .../optional/optional.object/types.pass.cpp | 38 + .../optional/optional.relops/equal.pass.cpp | 74 ++ .../optional.relops/greater_equal.pass.cpp | 70 ++ .../optional/optional.relops/greater_than.pass.cpp | 70 ++ .../optional/optional.relops/less_equal.pass.cpp | 70 ++ .../optional/optional.relops/less_than.pass.cpp | 70 ++ .../optional/optional.relops/not_equal.pass.cpp | 74 ++ .../optional.specalg/make_optional.pass.cpp | 51 + .../make_optional_explicit.pass.cpp | 45 + ...ake_optional_explicit_initializer_list.pass.cpp | 53 + .../optional/optional.specalg/swap.pass.cpp | 352 ++++++ .../optional.syn/optional_in_place_t.fail.cpp | 26 + .../optional_includes_initializer_list.pass.cpp | 22 + .../optional.syn/optional_nullopt_t.fail.cpp | 29 + test/support/archetypes.hpp | 322 ++++- test/support/archetypes.ipp | 141 ++- 86 files changed, 8469 insertions(+), 52 deletions(-) create mode 100644 include/optional create mode 100644 test/libcxx/utilities/optional/optional.object/optional.object. [...] create mode 100644 test/libcxx/utilities/optional/optional.object/optional.object. [...] create mode 100644 test/libcxx/utilities/optional/optional.object/optional.object. [...] create mode 100644 test/libcxx/utilities/optional/optional.object/optional.object. [...] create mode 100644 test/libcxx/utilities/optional/optional.object/special_member_g [...] create mode 100644 test/libcxx/utilities/optional/version.pass.cpp create mode 100644 test/std/utilities/optional/optional.bad_optional_access/defaul [...] create mode 100644 test/std/utilities/optional/optional.bad_optional_access/derive [...] create mode 100644 test/std/utilities/optional/optional.comp_with_t/equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.comp_with_t/greater.pass.cpp create mode 100644 test/std/utilities/optional/optional.comp_with_t/greater_equal. [...] create mode 100644 test/std/utilities/optional/optional.comp_with_t/less_equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.comp_with_t/less_than.pass.cpp create mode 100644 test/std/utilities/optional/optional.comp_with_t/not_equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.hash/hash.pass.cpp create mode 100644 test/std/utilities/optional/optional.nullops/equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.nullops/greater.pass.cpp create mode 100644 test/std/utilities/optional/optional.nullops/greater_equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.nullops/less_equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.nullops/less_than.pass.cpp create mode 100644 test/std/utilities/optional/optional.nullops/not_equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.nullopt/not_brace_initiali [...] create mode 100644 test/std/utilities/optional/optional.nullopt/nullopt_t.pass.cpp create mode 100644 test/std/utilities/optional/optional.object/optional.object.ass [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.ass [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.ass [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.ass [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.ass [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.ass [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.ass [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.ass [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.cto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.dto [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.mod [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.obs [...] create mode 100644 test/std/utilities/optional/optional.object/optional.object.swa [...] create mode 100644 test/std/utilities/optional/optional.object/optional_requires_d [...] create mode 100644 test/std/utilities/optional/optional.object/special_member_gen. [...] create mode 100644 test/std/utilities/optional/optional.object/types.pass.cpp create mode 100644 test/std/utilities/optional/optional.relops/equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.relops/greater_equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.relops/greater_than.pass.cpp create mode 100644 test/std/utilities/optional/optional.relops/less_equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.relops/less_than.pass.cpp create mode 100644 test/std/utilities/optional/optional.relops/not_equal.pass.cpp create mode 100644 test/std/utilities/optional/optional.specalg/make_optional.pass.cpp create mode 100644 test/std/utilities/optional/optional.specalg/make_optional_expl [...] create mode 100644 test/std/utilities/optional/optional.specalg/make_optional_expl [...] create mode 100644 test/std/utilities/optional/optional.specalg/swap.pass.cpp create mode 100644 test/std/utilities/optional/optional.syn/optional_in_place_t.fail.cpp create mode 100644 test/std/utilities/optional/optional.syn/optional_includes_init [...] create mode 100644 test/std/utilities/optional/optional.syn/optional_nullopt_t.fail.cpp