ecmarkup/lib/lint/rules/prefer-throw-shorthand.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 = 'prefer-throw-shorthand';
/*
Checks that "return ThrowCompletion(...)" is written using the "throw" shorthand.
Does not flag ThrowCompletion when its result is assigned to an alias.
*/
function default_1(report, step, algorithmSource, parsedSteps) {
    const stepSeq = parsedSteps.get(step);
    if (stepSeq == null) {
        return;
    }
    const items = stepSeq.items;
    for (let i = 1; i < items.length; ++i) {
        const item = items[i];
        if (item.name === 'call' &&
            item.callee.length === 1 &&
            item.callee[0].name === 'text' &&
            item.callee[0].contents === 'ThrowCompletion') {
            const prev = items[i - 1];
            if (prev.name === 'text' && /\breturn\s+$/i.test(prev.contents)) {
                report({
                    ruleId,
                    message: 'prefer "throw _x_" over "return ThrowCompletion(_x_)"',
                    ...(0, utils_1.offsetToLineAndColumn)(algorithmSource, item.callee[0].location.start.offset),
                });
            }
        }
    }
}