76 lines
2.1 KiB
JavaScript
76 lines
2.1 KiB
JavaScript
/**
|
|
* @fileoverview Rule to flag use of function declaration identifiers as variables.
|
|
* @author Ian Christian Myers
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const astUtils = require("./utils/ast-utils");
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
/** @type {import('../shared/types').Rule} */
|
|
module.exports = {
|
|
meta: {
|
|
type: "problem",
|
|
|
|
docs: {
|
|
description: "disallow reassigning `function` declarations",
|
|
recommended: true,
|
|
url: "https://eslint.org/docs/rules/no-func-assign"
|
|
},
|
|
|
|
schema: [],
|
|
|
|
messages: {
|
|
isAFunction: "'{{name}}' is a function."
|
|
}
|
|
},
|
|
|
|
create(context) {
|
|
|
|
/**
|
|
* Reports a reference if is non initializer and writable.
|
|
* @param {References} references Collection of reference to check.
|
|
* @returns {void}
|
|
*/
|
|
function checkReference(references) {
|
|
astUtils.getModifyingReferences(references).forEach(reference => {
|
|
context.report({
|
|
node: reference.identifier,
|
|
messageId: "isAFunction",
|
|
data: {
|
|
name: reference.identifier.name
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Finds and reports references that are non initializer and writable.
|
|
* @param {Variable} variable A variable to check.
|
|
* @returns {void}
|
|
*/
|
|
function checkVariable(variable) {
|
|
if (variable.defs[0].type === "FunctionName") {
|
|
checkReference(variable.references);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks parameters of a given function node.
|
|
* @param {ASTNode} node A function node to check.
|
|
* @returns {void}
|
|
*/
|
|
function checkForFunction(node) {
|
|
context.getDeclaredVariables(node).forEach(checkVariable);
|
|
}
|
|
|
|
return {
|
|
FunctionDeclaration: checkForFunction,
|
|
FunctionExpression: checkForFunction
|
|
};
|
|
}
|
|
};
|