53 lines
1.4 KiB
JavaScript
53 lines
1.4 KiB
JavaScript
/**
|
|
* @fileoverview Rule to flag assignment of the exception parameter
|
|
* @author Stephen Murray <spmurrayzzz>
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const astUtils = require("./utils/ast-utils");
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
module.exports = {
|
|
meta: {
|
|
type: "problem",
|
|
|
|
docs: {
|
|
description: "disallow reassigning exceptions in `catch` clauses",
|
|
category: "Possible Errors",
|
|
recommended: true,
|
|
url: "https://eslint.org/docs/rules/no-ex-assign"
|
|
},
|
|
|
|
schema: [],
|
|
|
|
messages: {
|
|
unexpected: "Do not assign to the exception parameter."
|
|
}
|
|
},
|
|
|
|
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, messageId: "unexpected" });
|
|
});
|
|
}
|
|
|
|
return {
|
|
CatchClause(node) {
|
|
context.getDeclaredVariables(node).forEach(checkVariable);
|
|
}
|
|
};
|
|
|
|
}
|
|
};
|