crates.io · #88 most downloaded on crates.io

clap_lex

1.1.1925M downloads/moclap-rs/clap ↗New releases in your daily digest, changelog included.

Minimal, flexible command line parser

Last release 23 days ago
14 Sep 2026
Ships fairly regularly
a new release about every 4 months
Most releases are documented
notes for 22 of 28 stable releases
Nothing withdrawn
no release was ever pulled
4 years old
28 releases · first in 2022

Release timeline

28 releases since 2022

20222023202420252026

20222026

One column per quarter.

Releases

1.1.114 Sept 2026
chore: Release clap_lex version 1.1.1
chore: Release clap_lex version 1.1.1
Open source →
Additional notes
Bug Fixes

fixes a logic bug and allows setting Arg::number_of_values() < 2 (42b6d1fc, closes #161)
Open source →
1.1.012 Mar 2026
allows creating unified help messages, a la docopt or getopts (52bcd892, closes #158)
Features

allows creating unified help messages, a la docopt or getopts (52bcd892, closes #158)

allows stating all subcommands should not have --version flags (336c476f, closes #156)

allows setting version number to auto-propagate through subcommands (bc66d3c6, closes #157)

Improvements

Help Strings properly aligns and handles newlines in long help strings (f9800a29, closes #145)

Performance

Help Messages big performance improvements when printing help messages (52bcd892)

Documentation

updates readme with new features (8232f7bb)

fix incorrect code example for App::subcommand_required (8889689d)

From the same repository

clap-rs/clap

Additional notes

Compatibility

Update MSRV to 1.85

Open source →

1.0.112 Mar 2026

allows empty values when using --long='' syntax (083f82d3, closes #151)

Bug Fixes

allows empty values when using --long='' syntax (083f82d3, closes #151)

Open source →

Additional notes

Internal

Update dependencies

Open source →

1.0.011 Feb 2026

README.md adds new features to what's new list

Documentation

README.md adds new features to what's new list (938f7f01)
README.md use with_name for subcommands (28b7e316)

Features

args can now be parsed from arbitrary locations, not just std::env::args() (75312528)

Open source →

0.7.712 Jan 2026

### Fixes - Be more specific on lifetimes

Fixes

Be more specific on lifetimes

Open source →

0.7.613 Oct 2025

Options adds number of values to options in help/usage

Improvements

Options adds number of values to options in help/usage (c1c993c4)

Features

from_usage adds ability to add value names or num of vals in usage string (ad55748c, closes #98)

Bug Fixes

MultipleValues properly distinguishes between multiple values and multiple occurrences (dd2a7564, closes #99)
help fixes tab alignment with multiple values (847001ff)

Documentation

from_usage explains new usage strings with multiple values (5a3a42df)

Open source →

0.7.59 Jun 2025

Options fixes bug where options with no value don't error out

Bug Fixes

Options fixes bug where options with no value don't error out (a1fb94be)

Open source →

0.7.45 Dec 2024

Options fixes a bug where option arguments in succession get their values skipped

Bug Fixes

Options fixes a bug where option arguments in succession get their values skipped (f66334d0)

Open source →

Additional notes

Fixes

Support E in numbers, not just e

Open source →

0.7.313 Nov 2024

RequiredValues fixes a bug where missing values are parsed as missing arguments

Bug Fixes

RequiredValues fixes a bug where missing values are parsed as missing arguments (93c4a723)

Improvements

ErrorMessages improves error messages and corrections (a29c3983)
ArgGroups improves requirement and confliction support for groups (c236dc5f)

Open source →

0.7.225 Jul 2024

RequiredArgs fixes bug where required-by-default arguments are not listed in usage (12aea961, closes #96)

Bug Fixes

RequiredArgs fixes bug where required-by-default arguments are not listed in usage (12aea961, closes #96)

Open source →

0.7.16 Jun 2024

MultipleValues stops evaluating values if the max or exact number of values was reached

Bug Fixes

MultipleValues stops evaluating values if the max or exact number of values was reached (86d92c9f)

Open source →

0.7.08 Feb 2024Breaking

arg allow other types besides Vec for multiple value settings (BREAKING CHANGE 0cc2f698, closes #87)

Bug Fixes

from_usage removes bug where usage strings have no help text (ad4e5451, closes #83)

Features

MultipleValues
- add support for minimum and maximum number of values (53f6b8c9)
- adds support limited number and named values (ae09f05e)
- implement shorthand for options with multiple values (6669f0a9)
arg allow other types besides Vec for multiple value settings (BREAKING CHANGE 0cc2f698, closes #87)
usage implement smart usage strings on errors (d77048ef, closes #88)

Open source →

Additional notes

Compatibility

Update MSRV to 1.74

Fixes

Improve unsafe code by using new OsStr API

Open source →

0.6.024 Oct 2023

app add support for building args from usage strings

Bug Fixes

tests fix failing doc tests (3710cd69)

Features

app add support for building args from usage strings (d5d48bcf)
args add ability to create basic arguments from a usage string (ab409a8f)

Open source →

Additional notes

Breaking Change

Renamed is_number to more focused is_negative_number

Performance

Reduced code size

Open source →

0.5.124 Aug 2023

args determine if the only arguments allowed are also required

Bug Fixes

args determine if the only arguments allowed are also required (0a09eb36)

Open source →

Additional notes

Compatibility

Update MSRV to 1.70.0

Open source →

0.5.019 May 2023

args add support for a specific set of allowed values on options or positional arguments

Features

args add support for a specific set of allowed values on options or positional arguments (270eb889)

Open source →

Additional notes

Breaking Change

Removed OsStrExt::split_at

Open source →

0.4.128 Mar 2023Deprecated

Deprecated OsStrExt::split_at as its unsound

Compatibility

Deprecated OsStrExt::split_at as its unsound

Open source →

0.4.028 Mar 2023

RawOsStr and RawOsString are no long exported

Breaking Change

RawOsStr and RawOsString are no long exported
Return types were changed from RawOsStr to OsStr

Features

OsStrExt trait added to help with processing OsStrs

Performance

os_str_bytes dependency was dropped to improve build times and reduce binary size

Open source →

0.3.316 Mar 2023

Nothing published for this version

0.3.223 Feb 2023

Nothing published for this version

0.3.113 Jan 2023

### Compatibility MSRV changed to 1.64.0

Compatibility

MSRV changed to 1.64.0

Open source →

0.3.020 Sept 2022

RawArgs::insert now takes owned values

Breaking Changes

RawArgs::insert now takes owned values

Compatibility

MSRV changed from 1.56.1 to 1.60.0

Open source →

0.2.428 Jun 2022

Nothing published for this version

0.2.321 Jun 2022

Nothing published for this version

0.2.213 Jun 2022

Nothing published for this version

0.2.113 Jun 2022

Allow checking if at end of input

Features

Allow checking if at end of input

Open source →

0.2.030 Apr 2022

Don't do prefix matching by default

Breaking Changes

Don't do prefix matching by default

Open source →

0.1.115 Apr 2022

[Unreleased]: https://github.com/clap-rs/clap/compare/clap_lex-v1.1.1...HEAD [1.1.1]: https://github.com/clap-rs/clap/compare/clap_l

Drop memchr dependency

[Unreleased]: https://github.com/clap-rs/clap/compare/clap_lex-v1.1.1...HEAD [1.1.1]: https://github.com/clap-rs/clap/compare/clap_lex-v1.1.0...clap_lex-v1.1.1 [1.1.0]: https://github.com/clap-rs/clap/compare/clap_lex-v1.0.1...clap_lex-v1.1.0 [1.0.1]: https://github.com/clap-rs/clap/compare/clap_lex-v1.0.0...clap_lex-v1.0.1 [1.0.0]: https://github.com/clap-rs/clap/compare/clap_lex-v0.7.7...clap_lex-v1.0.0 [0.7.7]: https://github.com/clap-rs/clap/compare/clap_lex-v0.7.6...clap_lex-v0.7.7 [0.7.6]: https://github.com/clap-rs/clap/compare/clap_lex-v0.7.5...clap_lex-v0.7.6 [0.7.5]: https://github.com/clap-rs/clap/compare/clap_lex-v0.7.4...clap_lex-v0.7.5 [0.7.4]: https://github.com/clap-rs/clap/compare/clap_lex-v0.7.3...clap_lex-v0.7.4 [0.7.3]: https://github.com/clap-rs/clap/compare/clap_lex-v0.7.2...clap_lex-v0.7.3 [0.7.2]: https://github.com/clap-rs/clap/compare/clap_lex-v0.7.1...clap_lex-v0.7.2 [0.7.1]: https://github.com/clap-rs/clap/compare/clap_lex-v0.7.0...clap_lex-v0.7.1 [0.7.0]: https://github.com/clap-rs/clap/compare/clap_lex-v0.6.0...clap_lex-v0.7.0 [0.6.0]: https://github.com/clap-rs/clap/compare/clap_lex-v0.5.1...clap_lex-v0.6.0 [0.5.1]: https://github.com/clap-rs/clap/compare/clap_lex-v0.5.0...clap_lex-v0.5.1 [0.5.0]: https://github.com/clap-rs/clap/compare/clap_lex-v0.4.1...clap_lex-v0.5.0 [0.4.1]: https://github.com/clap-rs/clap/compare/clap_lex-v0.4.0...clap_lex-v0.4.1 [0.4.0]: https://github.com/clap-rs/clap/compare/clap_lex-v0.3.3...clap_lex-v0.4.0 [0.3.3]: https://github.com/clap-rs/clap/compare/clap_lex-v0.3.2...clap_lex-v0.3.3 [0.3.2]: https://github.com/clap-rs/clap/compare/clap_lex-v0.3.1...clap_lex-v0.3.2 [0.3.1]: https://github.com/clap-rs/clap/compare/clap_lex-v0.3.0...clap_lex-v0.3.1 [0.3.0]: https://github.com/clap-rs/clap/compare/clap_lex-v0.2.4...clap_lex-v0.3.0 [0.2.4]: https://github.com/clap-rs/clap/compare/clap_lex-v0.2.3...clap_lex-v0.2.4 [0.2.3]: https://github.com/clap-rs/clap/compare/clap_lex-v0.2.2...clap_lex-v0.2.3 [0.2.2]: https://github.com/clap-rs/clap/compare/clap_lex-v0.2.1...clap_lex-v0.2.2 [0.2.1]: https://github.com/clap-rs/clap/compare/clap_lex-v0.2.0...clap_lex-v0.2.1 [0.2.0]: https://github.com/clap-rs/clap/compare/clap_lex-v0.1.1...clap_lex-v0.2.0 [0.1.1]: https://github.com/clap-rs/clap/compare/ce71b08a3fe28c640dc6e17f6f5bb1452bd6d6d8...clap_lex-v0.1.1

Open source →

0.1.015 Apr 2022

Nothing published for this version

Your coding agent can read these notes before it upgrades. Set up the MCP server →

clap_complete_nushellcrates.io

A generator library used with clap for Nushell completion scripts