convert-case

Rust library for converting between string cases.

use convert_case::ccase;

assert_eq!(
    ccase!(camel, "My_Var_Name"),
    "myVarName",
);
assert_eq!(
    ccase!(snake, "IOStream"),
    "io_stream",
);
assert_eq!(
    ccase!(snake -> title, "2020-04-16_family_photo"),
    "2020-04-16 Family Photo",
);

convert-case is highly customizable. You can read the API documentation on docs.rs for a list of all features and read lots of examples.

Cases

This is list of cases that convert_case provides out of the box. You can always make your own custom case.

Additional utilities with convert_case_extras

Some cases and utilities that didn't feel appropriate in this library are made available in a distinct crate called convert_case_extras. This crate is a demonstration of what can be built on top of the convert_case API.

Command Line Utility ccase

The command line utility ccase was made to expose the tools of the convert_case library to the command line.

$ ccase -t title super_mario_64
Super Mario 64

$ ccase -f snake -t title 2020-04-15_my_cat
2020-04-16 My Cat

$ ccase -t camel "convert to camel"
convertToCamel

Links

Change Log

0.12.0: Optimizations

This release improves speed and memory efficiency. A couple techniques were used:

• Character case checks first check ascii before doing the more expensive grapheme checks (which require heap allocations).
• Delimiter only splits get a dedicated path in the split method.
• The case of characters is computed upfront in a bitmask before checking individual boundary conditions in split. Built-in boundaries get a custom implementation built on top of this bitmask.

See CHANGELOG.md for the full history.