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Rust container / collection literal macros for HashMap, HashSet, BTreeMap, BTreeSet.
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Container / collection literal macros for HashMap, HashSet, BTreeMap, BTreeSet.

You can use these for convenience. Using them has no other implications.

Please read the API documentation here

build_status crates

Recent Changes

  • 1.0.2
    • Fix usage of the macros through full paths, like maplit::hashmap!(..) (#27)
  • 1.0.1
    • Fix unused_results lint in the macros by @povilasb
  • 1.0.0
    • maplit 1.0!
    • Only documentation changes since the last version
  • 0.1.6
    • Add macro convert_args! for composable opt-in conversion of the expressions being used for the maplit macros.
  • 0.1.5
    • Add license files correctly
    • Add category
    • Small doc improvements by @seeekr and @sanmai-NL
  • 0.1.4
    • Update docs to point to
  • 0.1.2
    • Now supports more arguments in hashset!{} and hashmap!{}
  • 0.1.0
    • Initial release


Question: Very large maps take a long time to compile?

Answer: Rustc is very slow to compile big expressions with many literals (including integers and float literals). Work around this by either using explicitly typed literals, or explicitly typed conversions. See for more information.


Dual-licensed to be compatible with the Rust project.

Licensed under the Apache License, Version 2.0 or the MIT license, at your option. This file may not be copied, modified, or distributed except according to those terms.

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