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 12734x 12734x 12734x 12734x 12734x 12734x 80x 80x 12732x 12732x 12734x 1x 1x 12732x 12734x 14x 14x 14x 14x 14x     14x 14x 14x 12732x 12732x 12732x 12732x 12734x 2x 2x 12734x  
/** @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);
	}
}