libc++ Ranges Status

Overview

This document contains the status of the Ranges library in libc++. It is used to track both the status of the sub-projects of the ranges library and who is assigned to these sub-projects. This is imperative to effective implementation so that work is not duplicated and implementors are not blocked by each other.

If you are interested in contributing to the libc++ Ranges library, please send a message to the #libcxx channel in the LLVM discord. Please do not start working on any of the assigned items below.

Major features

Standard	Name	Assignee	CL	Status
C++23	ranges::to	Konstantin Varlamov	D142335	Complete
C++23	Pipe support for user-defined range adaptors	Louis Dionne, Jakub Mazurkiewicz, and Xiaoyang Liu	Various	Complete
C++23	Formatting Ranges	Mark de Wever	Various	Complete
C++20	Stashing stashing iterators for proper flattening	Jakub Mazurkiewicz	Various	In progress

Views

Standard	View	Assignee	CL	Status
C++20	empty	Zoe Carver	D103208	✅
C++20	single	Zoe Carver	D106840	✅
C++20	iota (view)	Zoe Carver	D107396	✅
C++20	all	Zoe Carver	D102028	✅
C++20	ref_view	Zoe Carver	D102020	✅
C++20	owning_view	Arthur O’Dwyer	D116894	✅
C++20	filter	Louis Dionne	D109086	✅
C++20	transform	Zoe Carver	D103056	✅
C++20	take	Zoe Carver	D106507	✅
C++20	take_while	Hui Xie	D134952	✅
C++20	drop	Zoe Carver	D102037	✅
C++20	drop_while	Hui Xie	D135460	✅
C++20	join	Zoe Carver	D107671	✅
C++20	split	Hui Xie	D142063	✅
C++20	lazy_split	Zoe Carver and Konstantin Varlamov	D107500	✅
C++20	counted	Zoe Carver	D106923	✅
C++20	common	Zoe Carver	D105753	✅
C++20	reverse	Zoe Carver	D107096	✅
C++20	elements / keys / values	Hui Xie	D136268	✅
C++20	istream	Hui Xie	D133317	✅
C++23	repeat	Yrong	D141699	✅
C++23	cartesian_product	Unassigned	No patch yet	Not started
C++23	zip	Hui Xie	D122806	✅
C++23	zip_transform	Hui Xie	No patch yet	Not started
C++23	adjacent	Hui Xie	No patch yet	Not started
C++23	adjacent_transform	Hui Xie	No patch yet	Not started
C++23	join_with	Jakub Mazurkiewicz	65536	In progress
C++23	slide	Will Hawkins	67146	In Progress
C++23	chunk	Unassigned	No patch yet	Not started
C++23	chunk_by	Jakub Mazurkiewicz	D144767	✅
C++23	as_const	Unassigned	No patch yet	Not started
C++23	as_rvalue	Nikolas Klauser	D137637	✅
C++23	stride	Hristo Hristov and Will Hawkins	D156924	In Progress
C++23	enumerate	Hristo Hristov	D157193	In Progress

Algorithms

Standard	Algorithm	Assignee	CL	Status
C++20	all C++20 algorithms	N/A	N/A	✅
C++23	find_last	Nicole Mazzuca	#99312	Complete
C++23	find_last_if	Nicole Mazzuca	#99312	Complete
C++23	find_last_if_not	Nicole Mazzuca	#99312	Complete
C++23	starts_with	Zijun Zhao	D150735	Complete
C++23	ends_with	Zijun Zhao	D150831	Complete
C++23	shift_left	Unassigned	No patch yet	Not started
C++23	shift_right	Unassigned	No patch yet	Not started
C++23	iota (algorithm)	Unassigned	No patch yet	Not started
C++23	fold	Unassigned	No patch yet	Not started
C++23	contains	Zijun Zhao	#65148	Complete
C++23	fold_left_with_iter	Christopher Di Bella	N/A	Complete
C++23	fold_left	Christopher Di Bella	N/A	Complete
C++23	fold_left_first_with_iter	Christopher Di Bella	N/A	In progress
C++23	fold_left_first	Christopher Di Bella	N/A	In progress
C++23	fold_right	Christopher Di Bella	N/A	In progress
C++23	fold_right_last	Christopher Di Bella	N/A	In progress