typedash/dist/snakeCase-CTKD7DMh.d.cts

modern, type-safe collection of utility functions

import { SnakeCase } from "type-fest";

//#region src/functions/snakeCase/snakeCase.d.ts
/**
 * Changes the casing of a string to snake case.
 * @param string The input string to change the casing of.
 * @returns A new string with the casing changed to snake case.
 * @example
 * ```ts
 * snakeCase('fooBar') // 'foo_bar'
 * snakeCase('foo bar') // 'foo_bar'
 * snakeCase('foo-bar') // 'foo_bar'
 * snakeCase('fooBar42') // 'foo_bar42'
 * ```
 */
declare function snakeCase<S extends string>(string: S): SnakeCase$1<S>;
/**
 * Changes the casing of a string to snake case.
 * @see {@link snakeCase}.
 */
type SnakeCase$1<S extends string> = TrimUnderscores<ReduceUnderscores<SnakeCase<S>>>;
/**
 * Reduces multiple underscores to a single underscore.
 * @param S The input string.
 * @returns A new string with multiple underscores reduced to a single underscore.
 * @example
 * ```ts
 * ReduceUnderscores<'foo__bar'> // 'foo_bar'
 * ReduceUnderscores<'foo_bar'> // 'foo_bar'
 * ReduceUnderscores<'foo___bar'> // 'foo_bar'
 * ```
 */
type ReduceUnderscores<S extends string> = S extends `${infer L}__${infer R}` ? ReduceUnderscores<`${L}_${R}`> : S extends `${infer L}${infer D}__${infer R}` ? ReduceUnderscores<`${L}${D}_${R}`> : S;
/**
 * Trims underscores from the start and end of a string.
 * @param S The input string.
 * @returns A new string with underscores trimmed from the start and end.
 * @example
 * ```ts
 * TrimUnderscores<'_foo_bar_'> // 'foo_bar'
 * TrimUnderscores<'foo_bar_'> // 'foo_bar'
 * TrimUnderscores<'_foo_bar'> // 'foo_bar'
 * TrimUnderscores<'foo_bar'> // 'foo_bar'
 * ```
 */
type TrimUnderscores<S extends string> = S extends `_${infer R}` ? TrimUnderscores<R> : S extends `${infer L}_` ? TrimUnderscores<L> : S;
//#endregion
export { snakeCase as n, SnakeCase$1 as t };
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