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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 10868x 10868x 10868x 10868x 10868x 10868x 24x 24x 10866x 10866x 10868x 11x 11x 11x 11x 11x 11x 11x 11x 10866x 10866x 10866x 10866x 10868x 2x 2x 10868x | import { parse_expression_at } from '../acorn.js';
import { regex_whitespace } from '../../patterns.js';
import { error } from '../../../errors.js';
 
/**
 * @param {import('../index.js').Parser} parser
 * @returns {import('estree').Expression}
 */
export default function read_expression(parser) {
	try {
		const node = parse_expression_at(parser.template, parser.ts, parser.index);
 
		let num_parens = 0;
 
		for (let i = parser.index; i < /** @type {number} */ (node.start); i += 1) {
			if (parser.template[i] === '(') num_parens += 1;
		}
 
		let index = /** @type {number} */ (node.end);
		while (num_parens > 0) {
			const char = parser.template[index];
 
			if (char === ')') {
				num_parens -= 1;
			} else if (!regex_whitespace.test(char)) {
				error(index, 'expected-token', ')');
			}
 
			index += 1;
		}
 
		parser.index = index;
 
		return /** @type {import('estree').Expression} */ (node);
	} catch (err) {
		parser.acorn_error(err);
	}
}
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