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/*
* Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/* ----------------------------------------------------------------------------
* Helper types
* ------------------------------------------------------------------------- */
/**
* Visitor function
*
* @param start - Start offset
* @param end - End offset
*/
type VisitorFn = (
start: number, end: number
) => void
/* ----------------------------------------------------------------------------
* Functions
* ------------------------------------------------------------------------- */
/**
* Split a string using the given separator
*
* @param input - Input value
* @param separator - Separator
* @param fn - Visitor function
*/
export function split(
input: string, separator: RegExp, fn: VisitorFn
): void {
separator = new RegExp(separator, "g")
/* Split string using separator */
let match: RegExpExecArray | null
let index = 0
do {
match = separator.exec(input)
/* Emit non-empty range */
const until = match?.index ?? input.length
if (index < until)
fn(index, until)
/* Update last index */
if (match) {
const [term] = match
index = match.index + term.length
/* Support zero-length lookaheads */
if (term.length === 0)
separator.lastIndex = match.index + 1
}
} while (match)
}
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