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 12682x 12682x 12682x 12682x 12682x 12682x 80x 80x 12680x 12680x 12682x 1x 1x 12680x 12682x 14x 14x 14x 14x 14x     14x 14x 14x 12680x 12680x 12680x 12680x 12682x 2x 2x 12682x  
/** @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);
	}
}