import type { StringIncludes, StringSplit } from './string.js';
export declare namespace StringPlus {
    /**
     * Check if `Subject` includes `Search`.
     * If either of them is not a string, returns `Else`.
     *
     * ```ts
     * type R = StringPlus.Includes<'abc', 'a'> // true
     *
     * type R = StringPlus.Includes<'abc', 'd'> // false
     * ```
     */
    type Includes<Subject extends string, Search extends string, Then = true, Else = false> = StringIncludes<Subject, Search, Then, Else>;
    /**
     * Split a string into substrings using the specified separator,
     * and return them as an array.
     *
     * ```ts
     * type R = StringPlus.Split<'abc', ''> // ['a', 'b', 'c']
     * type R = StringPlus.Split<'abc', 'a'> // ['', 'bc']
     * type R = StringPlus.Split<'abc', 'b'> // ['a', 'c']
     * type R = StringPlus.Split<'abc', 'c'> // ['ab', '']
     * ```
     */
    type Split<Subject extends string, Seperator extends string> = StringSplit<Subject, Seperator>;
}
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