ecmarkup/lib/lint/rules/for-each-of.js

Custom element definitions and core utilities for markup that specifies ECMAScript and related technologies.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = default_1;
const utils_1 = require("../../utils");
const ruleId = 'for-each-of';
/*
Checks that "For each" loops use "of", not "in".
*/
function default_1(report, step, algorithmSource, parsedSteps) {
    const stepSeq = parsedSteps.get(step);
    if (stepSeq == null || stepSeq.items.length < 3) {
        return;
    }
    const first = stepSeq.items[0];
    if (!(first.name === 'text' && first.contents.startsWith('For each '))) {
        return;
    }
    // Find the loop variable (underscore), then check the text after it
    for (let i = 1; i < stepSeq.items.length - 1; i++) {
        const item = stepSeq.items[i];
        if (item.name === 'underscore') {
            const next = stepSeq.items[i + 1];
            if (next.name === 'text' && /^ in\b/.test(next.contents)) {
                report({
                    ruleId,
                    ...(0, utils_1.offsetToLineAndColumn)(algorithmSource, next.location.start.offset + 1),
                    message: 'expected "of" instead of "in" in "for each"',
                });
            }
            break;
        }
    }
}