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56 lines
1.6 KiB
Plaintext
56 lines
1.6 KiB
Plaintext
'use strict';
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var utils = require('../utils.js');
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require('eslint-visitor-keys');
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require('espree');
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require('estraverse');
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function isConditional(node) {
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return node.type === "ConditionalExpression";
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}
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var noConfusingArrow = utils.createRule({
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name: "no-confusing-arrow",
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package: "js",
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meta: {
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type: "layout",
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docs: {
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description: "Disallow arrow functions where they could be confused with comparisons"
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},
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fixable: "code",
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schema: [{
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type: "object",
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properties: {
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allowParens: { type: "boolean", default: true },
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onlyOneSimpleParam: { type: "boolean", default: false }
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},
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additionalProperties: false
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}],
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messages: {
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confusing: "Arrow function used ambiguously with a conditional expression."
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}
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},
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create(context) {
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const config = context.options[0] || {};
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const allowParens = config.allowParens || config.allowParens === void 0;
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const onlyOneSimpleParam = config.onlyOneSimpleParam;
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const sourceCode = context.sourceCode;
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function checkArrowFunc(node) {
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const body = node.body;
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if (isConditional(body) && !(allowParens && utils.isParenthesised(sourceCode, body)) && !(onlyOneSimpleParam && !(node.params.length === 1 && node.params[0].type === "Identifier"))) {
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context.report({
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node,
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messageId: "confusing",
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fix(fixer) {
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return allowParens ? fixer.replaceText(node.body, `(${sourceCode.getText(node.body)})`) : null;
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}
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});
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}
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}
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return {
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ArrowFunctionExpression: checkArrowFunc
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};
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}
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});
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module.exports = noConfusingArrow;
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