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33 lines
1.0 KiB
33 lines
1.0 KiB
import formatError from './format-error'
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import {unclosedTemplateLiteral} from '../messages'
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export const $_ES6_BQ = '`'
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/**
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* Searches the next backquote that signals the end of the ES6 Template Literal
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* or the "${" sequence that starts a JS expression, skipping any escaped
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* character.
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*
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* @param {string} code - Whole code
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* @param {number} pos - The start position of the template
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* @param {string[]} stack - To save nested ES6 TL count
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* @returns {number} The end of the string (-1 if not found)
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*/
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export default function skipES6TL(code, pos, stack) {
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// we are in the char following the backquote (`),
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// find the next unescaped backquote or the sequence "${"
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const re = /[`$\\]/g
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let c
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while (re.lastIndex = pos, re.exec(code)) {
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pos = re.lastIndex
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c = code[pos - 1]
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if (c === '`') {
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return pos
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}
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if (c === '$' && code[pos++] === '{') {
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stack.push($_ES6_BQ, '}')
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return pos
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}
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// else this is an escaped char
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}
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throw formatError(code, unclosedTemplateLiteral, pos)
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}
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