no-restricted-syntax.js
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/**
* @fileoverview Rule to flag use of certain node types
* @author Burak Yigit Kaya
*/
"use strict";
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
const nodeTypes = require("espree").Syntax;
module.exports = {
meta: {
docs: {
description: "disallow specified syntax",
category: "Stylistic Issues",
recommended: false
},
schema: {
type: "array",
items: [
{
enum: Object.keys(nodeTypes).map(k => nodeTypes[k])
}
],
uniqueItems: true,
minItems: 0
}
},
create(context) {
/**
* Generates a warning from the provided node, saying that node type is not allowed.
* @param {ASTNode} node The node to warn on
* @returns {void}
*/
function warn(node) {
context.report({ node, message: "Using '{{type}}' is not allowed.", data: node });
}
return context.options.reduce((result, nodeType) => {
result[nodeType] = warn;
return result;
}, {});
}
};