70 lines
1.9 KiB
JavaScript
70 lines
1.9 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview Disallow shadowing of NaN, undefined, and Infinity (ES5 section 15.1.1)
|
||
|
|
* @author Michael Ficarra
|
||
|
|
*/
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Rule Definition
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
meta: {
|
||
|
|
docs: {
|
||
|
|
description: "disallow identifiers from shadowing restricted names",
|
||
|
|
category: "Variables",
|
||
|
|
recommended: false
|
||
|
|
},
|
||
|
|
|
||
|
|
schema: []
|
||
|
|
},
|
||
|
|
|
||
|
|
create(context) {
|
||
|
|
|
||
|
|
const RESTRICTED = ["undefined", "NaN", "Infinity", "arguments", "eval"];
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check if the node name is present inside the restricted list
|
||
|
|
* @param {ASTNode} id id to evaluate
|
||
|
|
* @returns {void}
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function checkForViolation(id) {
|
||
|
|
if (RESTRICTED.indexOf(id.name) > -1) {
|
||
|
|
context.report({
|
||
|
|
node: id,
|
||
|
|
message: "Shadowing of global property '{{idName}}'.",
|
||
|
|
data: {
|
||
|
|
idName: id.name
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
VariableDeclarator(node) {
|
||
|
|
checkForViolation(node.id);
|
||
|
|
},
|
||
|
|
ArrowFunctionExpression(node) {
|
||
|
|
[].map.call(node.params, checkForViolation);
|
||
|
|
},
|
||
|
|
FunctionExpression(node) {
|
||
|
|
if (node.id) {
|
||
|
|
checkForViolation(node.id);
|
||
|
|
}
|
||
|
|
[].map.call(node.params, checkForViolation);
|
||
|
|
},
|
||
|
|
FunctionDeclaration(node) {
|
||
|
|
if (node.id) {
|
||
|
|
checkForViolation(node.id);
|
||
|
|
[].map.call(node.params, checkForViolation);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
CatchClause(node) {
|
||
|
|
checkForViolation(node.param);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
};
|