48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview A rule to disallow modifying variables that are declared using `const`
|
||
|
|
* @author Toru Nagashima
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
const astUtils = require("../ast-utils");
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Rule Definition
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
meta: {
|
||
|
|
docs: {
|
||
|
|
description: "disallow reassigning `const` variables",
|
||
|
|
category: "ECMAScript 6",
|
||
|
|
recommended: true
|
||
|
|
},
|
||
|
|
|
||
|
|
schema: []
|
||
|
|
},
|
||
|
|
|
||
|
|
create(context) {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Finds and reports references that are non initializer and writable.
|
||
|
|
* @param {Variable} variable - A variable to check.
|
||
|
|
* @returns {void}
|
||
|
|
*/
|
||
|
|
function checkVariable(variable) {
|
||
|
|
astUtils.getModifyingReferences(variable.references).forEach(reference => {
|
||
|
|
context.report({ node: reference.identifier, message: "'{{name}}' is constant.", data: { name: reference.identifier.name } });
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
VariableDeclaration(node) {
|
||
|
|
if (node.kind === "const") {
|
||
|
|
context.getDeclaredVariables(node).forEach(checkVariable);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
};
|