Blame view
node_modules/eslint/lib/rules/no-label-var.js
1.99 KB
f7563de62
first commit
|
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 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 |
/**
* @fileoverview Rule to flag labels that are the same as an identifier
* @author Ian Christian Myers
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const astUtils = require("../ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: "disallow labels that share a name with a variable",
category: "Variables",
recommended: false
},
schema: []
},
create(context) {
//--------------------------------------------------------------------------
// Helpers
//--------------------------------------------------------------------------
/**
* Check if the identifier is present inside current scope
* @param {Object} scope current scope
* @param {string} name To evaluate
* @returns {boolean} True if its present
* @private
*/
function findIdentifier(scope, name) {
return astUtils.getVariableByName(scope, name) !== null;
}
//--------------------------------------------------------------------------
// Public API
//--------------------------------------------------------------------------
return {
LabeledStatement(node) {
// Fetch the innermost scope.
const scope = context.getScope();
// Recursively find the identifier walking up the scope, starting
// with the innermost scope.
if (findIdentifier(scope, node.label.name)) {
context.report({ node, message: "Found identifier with same name as label." });
}
}
};
}
};
|