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

95.74% Statements 45/47
90.9% Branches 10/11
100% Functions 1/1
95.45% Lines 42/44

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 43 44 452x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 11973x 11973x 11973x 11973x 11973x 11973x 78x 78x 11971x 11971x 11973x 1x 1x 11971x 11973x 12x 12x 12x 12x 12x     12x 12x 12x 11971x 11971x 11971x 11971x 11973x 2x 2x 11973x  
/** @import { Expression } from 'estree' */
/** @import { Parser } from '../index.js' */
import { parse_expression_at } from '../acorn.js';
import { regex_whitespace } from '../../patterns.js';
import * as e from '../../../errors.js';
 
/**
 * @param {Parser} parser
 * @returns {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 {Expression} */ (node);
	} catch (err) {
		parser.acorn_error(err);
	}
}