Document number:
Date:	2013-04-24
Project:	Programming Language C++
Reply-to:	Beman Dawes <bdawes@acm.org>

Library Proposals Status List (Revision 1) DRAFT

This status list tracks the progress of post-C++11 standard library proposals and lists pre-C++11 library proposals of still of interest. See the current Call for Library Proposals for information about how to submit a proposal to the C++ standards committee.

Proposals are tracked regardless of which working or study group is responsible.

Groups responsible for proposals

LEWG - Library Evolution Working Group (Beman Dawes)
LWG - Library Working Group (Alisdair Meredith)
SG1 - Concurrency and Parallelism (Hans Boehm)
SG2- Modules (Doug Gregor)
SG3 - File System (Beman Dawes)
SG4 - Networking (Kyle Kloepper)
SG5 - Transactional Memory (Michael Wong)
SG6 - Numerics (Lawrence Crowl)
SG7 - Reflection (Chandler Carruth)
SG8 - Concepts (Matt Austern)
SG9 - Ranges (Marshall Clow)
SG10 - Feature Test (Clark Nelson)

Status

New - A proposal that is awaiting review by the appropriate WG or SG.
Active - A proposal that has been reviewed and is undergoing refinement.
Review - A revised proposal document that is awaiting review.
Ready - A proposal ready for a formal vote. Note: this is normally an intra meeting status.
Adopted - A proposal that has been formally accepted for inclusion in an official working paper.
Tabled - A proposal that is set aside, perhaps temporarily, because of lack of interest, lack of experts, or more pressing work.
Closed - A proposal that does not have sufficient support to move forward and will not be given further consideration.
Future - A proposal that does not have sufficient support to move forward for this revision cycle of the standard or applicable Technical Specification, but may be of interest for a future standard or TS.

Procedures

Proposals accepted by the LEWG are then passed to the LWG for review.

Post-C++11 Library Proposals

Document Number	Status	Owner	Title / Annotation	Authors
N3230	Active	LWG	Constexpr Library Additions: future	Benjamin Kosnik
2012-01-pre-Kona
N3333	Active		Hashing User-Defined Types in C++1y	J. Yasskin, C. Carruth
N3339	Active		A Preliminary Proposal for a Deep-Copying Smart Pointer	Walter E. Brown
N3344	Closed	N/A	Toward a Standard C++ 'Date' Class	S. Pacifico, A. Meredith, J. Lakos
N3350	Active	SG9	A minimal std::range<Iter>	Jeffrey Yasskin
N3352	Active	SG6	C++ Binary Fixed-Point Arithmetic	Lawrence Crowl
N3355		SG1	C++ Distributed Counters	Lawrence Crowl
N3356		SG1	C++ Mutable Threads	Chris Mysen
2012-02-post-Kona
N3360		SG4	Networking Library Status Report	Christopher Kohlhoff
N3374		SG4	SG4: Networking	K. Kloepper, N. Meyer
2012-09-pre-Portland
N3388		SG4	Using Asio with C++11	Christopher Kohlhoff
N3389		SG4	Urdl: a simple library for accessing web content	Christopher Kohlhoff
N3398 N3336	Active	LWG	String Interoperation Library	Beman Dawes
N3407		SG6	Proposal to Add Decimal Floating Point Support to C++	Dietmar Kühl
N3408	Active Merge with N3429	SG1	Parallelizing The Standard Algorithms Library	J. Hoberock, O. Giroux, V. Grover, J. Marathe, et al.
N3415	Tabled		A Database Access Library [Note 1]	Bill Seymour
N3419		SG1	Vector loops and Parallel Loops	Robert Geva
N3425		SG1	Concurrent Unordered Associative Containers for C++	A. Robison, A. Malakhov, A. Laksberg
N3429	Active Merge with N3408	SG1	A C++ Library Solution To Parallelism	A. Laksberg, H. Sutter, A. Robison, S. Mithani
N3441	New	LEWG	Call Stack Utilities and std::exception Extension Proposal	Aurelian Melinte
N3451		SG1	async and ~future	Herb Sutter
2012-11-post-Portland
N3457	New	LWG	Algorithm std::iota and its modifications.	Vladimir Grigoriev
N3458	Tabled		Simple Database Integration in C++11 [Note 1]	Thomas Neumann
N3459	Tabled		Comparison of Two Database Access Methodologies [Note 1]	Bill Seymour
N3465 N2882	Review	LWG	Adding heterogeneous comparison lookup to associative containers for TR2 (Rev 2) [Handle with N3573]	Joaquín Mª López Muñoz
N3477		SG4	C++ Internet Protocol Classes	A. Fabijanic, G. Obiltschnig
N3487		SG1	TLS and Parallelism	Pablo Halpern
2013-01-Mid-Term
N3494	New	SG6	A proposal to add special mathematical functions according to the ISO/IEC 80000-2:2009 standard	Vincent Reverdy
N3495	New	LEWG	inplace realloc	Ariane van der Steldt
N3500	New	LEWG	New assert variants [Handle with N3604]	Olaf van der Spek
N3505 N3399 N3365 N3335 N3239 etc.	Review	LWG	Filesystem Library Proposal	Beman Dawes
N3506	New	LEWG	A printf-like Interface for the Streams Library [Discussion to include other potential proposals]	Zhihao Yuan
N3508 N3390 N1939	Review	LEWG	Any Library Proposal (Revision 2)	B. Dawes, K. Henney
N3509	New	SG9	Operator Bool for Ranges	Olaf van der Spek
N3513 N3456	Review	SG9	Range arguments for container constructors and methods, wording revision 2 [Handle in a time slot when LWG and LEWG folks are available]	Jeffrey Yasskin
N3514	New	LEWG	A Proposal for the World's Dumbest Smart Pointer	Walter Brown
N3521	New	LEWG	convert() utility function	Jeffrey Yasskin
2013-03-pre-Bristol
N3525	New	LEWG	Polymorphic Allocators [Handle with N3575 and any other allocator proposals]	Pablo Halpern
N3527 N3406 N1878	Review	LEWG	A proposal to add a utility class to represent optional objects (Revision 2)	F. Cacciola, A. Krzemieński
N3530	New	SG1	Leveraging OpenMP infrastructure for language level parallelisation	D. Gove, N. Copty, M. Wong
N3531 N3468 N3402	Review	LWG	User-defined Literals for Standard Library Types (version 3)	Peter Sommerlad
N3532 N2648	Review	LEWG	C++ Dynamic Arrays	L. Crowl, M. Austern
N3533 N3434 N3353	Review	SG1	C++ Concurrent Queues	L. Crowl, C. Mysen
N3534	New	SG1	C++ Pipelines	A. Mackintosh, A. Berkan
N3535 N3395 N3354	Review	SG1	C++ Stream Mutexes	Lawrence Crowl
N3542 N3417 N3375	Review	SG6	Proposal for Unbounded-Precision Integer Types	Pete Becker
N3543 N3479 N3443	Review	LWG	Priority Queue, Queue and Stack: Changes and Additions [LWG will consult LEWG before acting]	G. Powell, T. Blechmann
N3546	New	LWG	TransformationTraits Redux [LWG will consult LEWG before acting]	Walter E. Brown
N3547	New	SG6	Three <random>-related Proposals [SG6 pinged]	Walter E. Brown
N3548	New	SG6	Conditionally-supported Special Math Functions for C++14 [SG6 pinged]	Walter E. Brown
N3554	New	SG1	A Parallel Algorithms Library	J. Hoberock, O. Giroux, V. Grover, H. Sutter, et al.
N3555 N3507 N3484 N3420	Review	SG4	A URI Library for C++	G. Matthews, D. Berris
N3556	New	SG1	Thread-Local Storage in X-Parallel Computations	P. Halpern, C. Leiserson
N3557	New	SG1	Considering a Fork-Join Parallelism Library	Pablo Halpern
N3558 N3428 N3327	Review	SG1	A Standardized Representation of Asynchronous Operations	N. Gustafsson, A. Laksberg, H. Sutter, S. Mithani
N3561	New	SG1	Semantics of Vector Loops	R. Geva, C. Nelson
N3562 N3378	Review	SG1	Executors and schedulers, revision 1	M. Austern, L. Crowl, C. Carruth, N. Gustaffson, et al.
N3563 N3446	Review	SG1	C++ Mapreduce	C. Mysen, L. Crowl, A. Berkan
N3564 N3328	Review	SG1	Resumable Functions	N. Gustafsson, D. Brewis, H. Sutter, S. Mithani
N3565	New	SG4	IP Address Design Constraints	Aleksandar Fabijanic
N3568 N3427 N2094	Review	SG1	Shared locking in C++	Howard Hinnant
N3570 N3431	Review	LWG	Quoted Strings Library Proposal (Revision 1)	Beman Dawes
N3571	New	SG1	A Proposal to add Single Instruction Multiple Data Computation to the Standard Library	P. Estérie, M. Gaunard, J. Falcou
N3572	New	LEWG	Unicode Support in the Standard Library	Mark Boyall
N3573	New	LWG	Heterogenous extensions to unordered containers [Handle with N3465]	Mark Boyall
N3574	New	EWG???	Binding stateful functions as function pointers [EWG pinged.]	Mark Boyall
N3575	New	LEWG	Additional Standard allocation schemes [Handle with N3525 and any other allocator proposals]	Mark Boyall
N3579 N3466	Review	LWG	A type trait for signatures [LWG may pass it back to LEWG]	Mike Spertus
N3581	New	LWG	Delimited iterators	Mike Spertus
N3584 N3404	Review	LWG	Wording for Accessing Tuple Fields by Type	Mike Spertus
N3585 N3450	Review	LWG	Iterator-Related Improvements to Containers (Revision 2)	Alan Talbot
N3586	New	LWG	Splicing Maps and Sets	A. Talbot, H. Hinnant
N3588	New	LWG	make_unique	Stephan T. Lavavej
N3593 N3510 N3430	Review	LEWG	std::split(): An algorithm for splitting strings [Schedule after N3609 (string_view) and N3513 (Range support). Do not schedule when SG9 is meeting.]	Greg Miller
N3594	New	LEWG	std::join(): An algorithm for joining a range of elements [Schedule after N3593 (split), N3609 (string_view), and N3513 (Range support). Do not schedule when SG9 is meeting.]	Greg Miller
N3600	New	SG1	C++ Latches and Barriers	Alasdair Mackintosh
N3603	New	SG4	A Three-Class IP Address Proposal	Christopher Kohlhoff
N3604	New	LEWG	Centralized Defensive-Programming Support for Narrow Contracts [Handle with N3500]	J. Lakos, A. Zakharov
N3606 N3411	Review	LWG	Extending std::search to use Additional Searching Algorithms	Marshall Clow
N3607	New	LWG	Making non-modifying sequence operations more robust [Assigned to LWG as it fixes a defect in existing standard library components and the proposed resolution is intertwined with existing library wording.]	M. Spertus, A. Pall
N3609 N3512 N3442 N3334	Review	LEWG	string_view: a non-owning reference to a string, revision 3 [Much LWG interest, so may wish to schedule when LWG folks available]	Jeffrey Yasskin
N3611 N3489 N3414 N3363	Review	SG6	A Rational Number Library for C++	Bill Seymour
N3612	New	LEWG	Desiderata of a C++11 Database Interface [Note 1]	Thomas Neumann
N3618	New	SG1	What can signal handlers do? (CWG 1441)	Hans Boehm
N3619	New	LWG	A proposal to add swappability traits to the standard library	Andrew Morrow
N3620	New	SG4	Network byte order conversion	Kyle Kloepper

Post-C++11 Accepted Library Proposals

Document Number	Date Adopted	Owner	Title / Annotation	Authors
N3346 N3301	2012-10	N/A	Defect Report: Terminology for Container Element Requirements	Pablo Halpern
N3421	2012-10	N/A	Making Operator Functors greater<>	Stephan T. Lavavej
N3302 N3228	2012-10	N/A	Constexpr Library Additions: complex	B. Kosnik, G. Dos Reis, D. Krügler
N3462 N3436	2012-10	N/A	std::result_of and SFINAE	E. Niebler, D. Walker, J. de Guzman
N3469 N3303 N3229	2012-10	N/A	Constexpr Library Additions: chrono, v3	B. Kosnik, D. Krügler
N3470 N3304	2012-10	N/A	Constexpr Library Additions: containers, v2	B. Kosnik, D. Krügler
N3471 N3305 N3231	2012-10	N/A	Constexpr Library Additions: utilities, v3	B. Kosnik, D. Krügler
N3545	2013-04	N/A	An Incremental Improvement to integral_constant	Walter E. Brown
N3644 N3585 N3450	2013-04	N/A	Null Forward Iterators	Alan Talbot
N3668 N3608 N3511	2013-04	N/A	exchange() utility function	Jeffrey Yasskin
N3658 N3493	2013-04	N/A	Compile-time integer sequences	Jonathan Wakely

Pre-C++11 Library Proposals

New Library Components Previously Considered for Future Inclusion
These papers present libraries that were actively under consideration for a future TR, when work on TR2 was deferred pending completion of C++11. These papers were viewed positively at the time, but were due at least one more revision before any adoption, and most will need some reworking to reflect the addition of C++11 language facilities.
N1974 N2054 N2175	Networking Library Proposal for TR2	Christopher Kohlhoff
N1843 N2067 N2137	A Proposal to add Interval Arithmetic to the C++ Standard Library	H. Brönnimann, G. Melquiond, S. Pion
N1871	Range Library Proposal	Thorsten Ottosen
N2068	Range Library Core	Thorsten Ottosen
N1872 N2059	Proposal for new string algorithms	P. Droba, T. Ottosen
N1873	The Cursor/Property Map Abstraction	D. Kühl, D. Abrahams

N1879	A proposal to add a general purpose ranged-checked numeric_cast<>	Fernando Cacciola
N1900 N2058	Proposal to Add Date-Time to the C++ Standard Library	Jeff Garland

N1973	Lexical Conversion Library Proposal for TR2	K. Henney, B. Dawes
N2044	Memory Mapped Files And Shared Memory For C++	Ion Gaztañaga
N2046 N2136	Bool_set: multi-valued logic	H. Brönnimann, G. Melquiond, S. Pion
N2065	A proposal to add stream objects based on fixed memory buffers	Alberto Ganesh Barbati
N2086	Signals and Slots for Library TR2	Douglas Gregor
N2101	Hierarchical Data Structures and Related Concepts for the C++ Standard Library	B. Reiter, R. Rivera
N2104	A Proposal to Add Parallel Iteration to the Standard Library	Arch D. Robison
N2050	Proposal to Add a Dynamically Sizeable Bitset to the Standard Library	J. Allsop, A. Meredith, G. Prota
N2648	C++ Dynamic Arrays	L. Crowl, M. Austern
N2639	Algorithms for permutations and combinations, with and without repetitions	Hervé Brönnimann
Papers With an Open Status
These papers have been reviewed by the LWG, and were not deemed compelling enough to plan for a future TR, but had not been outright rejected either.
N1668	A Proposal to add Mathematical Functions for Statistics to the C++ Standard Library	Paul A Bristow
N1425	Proposal for Technical Report on C++ Standard Library Security	Martyn Lovell
N1461	Security and Standard C Libraries	Martyn Lovell
N1744	Big Integer Library Proposal for C++0x	Michiel Salters
N1476 N1530 N1641	Iterator Facade and Adaptor	D. Abrahams, J. Siek, T. Witt
N2225	Improved integration with C arrays and strings	Thorsten Ottosen
N2388	Pointer Arithmetic for `shared_ptr`	Pablo Halpern
N2533	Tuples and Pairs	Alisdair Meredith
N2486	Alternative Allocators and Standard Containers	Lance Diduck
N2233	`basic_string operator <<`	Lawrence Crowl
N2698 N2718 N2754	Additional type traits: has_trivial_destructor_after_move and has_trivial_reallocation	Rodrigo Castro Campos

Notes

Note 1 - There is currently insufficient support for database bindings to merit further work in this area. Should sufficient support arise, along with people willing to do the work, work will resume.