libc++ C++1z Status

In November 2014, the C++ standard committee created a draft for the next version of the C++ standard, known here as "C++1z" (probably to be C++17)

This page shows the status of libc++; the status of clang's support of the language features is here.

The groups that have contributed papers:

Paper Status

Paper #GroupPaper NameMeetingStatusFirst released version
N3911LWGTransformationTrait Alias void_t.UrbanaComplete3.6
N4089LWGSafe conversions in unique_ptr<T[]>.Urbana
N4169LWGA proposal to add invoke function templateUrbanaComplete3.7
N4190LWGRemoving auto_ptr, random_shuffle(), And Old Stuff.Urbana
N4258LWGCleaning-up noexcept in the Library.UrbanaIn progress3.7
N4259CWGWording for std::uncaught_exceptionsUrbanaComplete3.7
N4277LWGTriviallyCopyable reference_wrapper.UrbanaComplete3.2
N4279LWGImproved insertion interface for unique-key maps.UrbanaComplete3.7
N4280LWGNon-member size() and moreUrbanaComplete3.6
N4284LWGContiguous Iterators.UrbanaComplete3.6
N4285CWGCleanup for exception-specification and throw-expression.Urbana
N4387LWGimproving pair and tupleLenexa
N4389LWGbool_constantLenexaComplete3.7
N4508LWGshared_mutex for C++17LenexaComplete3.7
N4366LWGLWG 2228 missing SFINAE ruleLenexaComplete3.1
N4510LWGMinimal incomplete type support for standard containers, revision 4LenexaComplete3.6

Library Working group Issues Status

Issue #Issue NameMeetingStatus
2016Allocators must be no-throw swappableUrbana
2118unique_ptr for array does not support cv qualification conversion of actual argumentUrbanaWill be resolved by N4089
2170Aggregates cannot be DefaultConstructibleUrbanaComplete
2308Clarify container destructor requirements w.r.t. std::arrayUrbanaComplete
2340Replacement allocation functions declared as inlineUrbanaComplete
2354Unnecessary copying when inserting into maps with braced-init syntaxUrbana
2377std::align requirements overly strictUrbanaComplete
2396underlying_type doesn't say what to do for an incomplete enumeration typeUrbanaComplete
2399shared_ptr's constructor from unique_ptr should be constrainedUrbanaComplete
2400shared_ptr's get_deleter() should use addressof()UrbanaComplete
2401std::function needs more noexceptUrbanaComplete
2404mismatch()'s complexity needs to be updatedUrbanaComplete
2408SFINAE-friendly common_type / iterator_traits is missing in C++14Urbanacommon_type is waiting on LWG#2465
2106move_iterator wrapping iterators returning prvaluesUrbana
2129User specializations of std::initializer_listUrbanaComplete
2212tuple_size for const pair request headerUrbanaComplete
2217operator==(sub_match, string) slices on embedded '\0'sUrbanaComplete
2230"see below" for initializer_list constructors of unordered containersUrbanaComplete
2233bad_function_call::what() unhelpfulUrbanaComplete
2266vector and deque have incorrect insert requirementsUrbanaComplete
2325minmax_element()'s behavior differing from max_element()'s should be notedUrbanaComplete
2361Apply 2299 resolution throughout libraryUrbana
2365Missing noexcept in shared_ptr::shared_ptr(nullptr_t)UrbanaComplete
2376bad_weak_ptr::what() overspecifiedUrbanaComplete
2387More nested types that must be accessible and unambiguousUrbanaComplete
2059C++0x ambiguity problem with map::eraseLenexaComplete
2063Contradictory requirements for string move assignmentLenexaComplete
2076Bad CopyConstructible requirement in set constructorsLenexaComplete
2160Unintended destruction ordering-specification of resizeLenexaComplete
2168Inconsistent specification of uniform_real_distribution constructorLenexaComplete
2239min/max/minmax requirementsLenexaComplete
2364deque and vector pop_back don't specify iterator invalidation requirementsLenexaComplete
2369constexpr max(initializer_list) vs max_elementLenexaComplete
2378Behaviour of standard exception typesLenexaComplete
2403stof() should call strtof() and wcstof()LenexaComplete
2406negative_binomial_distribution should reject p == 1LenexaComplete
2407packaged_task(allocator_arg_t, const Allocator&, F&&) should neither be constrained nor explicitLenexaComplete
2411shared_ptr is only contextually convertible to boolLenexaComplete
2415Inconsistency between unique_ptr and shared_ptrLenexaComplete
2420function does not discard the return value of the target objectLenexaComplete
2425operator delete(void*, size_t) doesn't invalidate pointers sufficientlyLenexaComplete
2427Container adaptors as sequence containers, reduxLenexaComplete
2428"External declaration" used without being definedLenexaComplete
2433uninitialized_copy()/etc. should tolerate overloaded operator&LenexaComplete
2434shared_ptr::use_count() is efficientLenexaComplete
2437iterator_traits::reference can and can't be voidLenexaComplete
2438std::iterator inheritance shouldn't be mandatedLenexaComplete
2439unique_copy() sometimes can't fall back to reading its outputLenexaComplete
2440seed_seq::size() should be noexceptLenexaComplete
2442call_once() shouldn't DECAY_COPY()LenexaComplete
2448Non-normative Container destructor specificationLenexaComplete
2454Add raw_storage_iterator::base() memberLenexaComplete
2455Allocator default construction should be allowed to throwLenexaComplete
2458N3778 and new library deallocation signaturesLenexaComplete
2459std::polar should require a non-negative rhoLenexaComplete
2464try_emplace and insert_or_assign misspecifiedLenexaComplete
2467is_always_equal has slightly inconsistent defaultLenexaComplete
2470Allocator's destroy function should be allowed to fail to instantiateLenexaComplete
2482[c.strings] Table 73 mentions nonexistent functionsLenexaComplete
2488Placeholders should be allowed and encouraged to be constexprLenexa

Last Updated: 5-Oct-2015