All files / src/compiler/phases/1-parse/read expression.js

95.55% Statements 43/45
90.9% Branches 10/11
100% Functions 1/1
95.23% Lines 40/42

Press n or j to go to the next uncovered block, b, p or k for the previous block.

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 40 41 42 432x 2x 2x 2x 2x 2x 2x 2x 2x 11740x 11740x 11740x 11740x 11740x 11740x 78x 78x 11738x 11738x 11740x 1x 1x 11738x 11740x 12x 12x 12x 12x 12x     12x 12x 12x 11738x 11738x 11738x 11738x 11740x 2x 2x 11740x  
import { parse_expression_at } from '../acorn.js';
import { regex_whitespace } from '../../patterns.js';
import * as e 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);
		if (node.trailingComments !== undefined && node.trailingComments.length > 0) {
			index = node.trailingComments.at(-1).end;
		}
 
		while (num_parens > 0) {
			const char = parser.template[index];
 
			if (char === ')') {
				num_parens -= 1;
			} else if (!regex_whitespace.test(char)) {
				e.expected_token(index, ')');
			}
 
			index += 1;
		}
 
		parser.index = index;
 
		return /** @type {import('estree').Expression} */ (node);
	} catch (err) {
		parser.acorn_error(err);
	}
}