72 lines
2.1 KiB
JavaScript
72 lines
2.1 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview Rule to flag references to undeclared variables.
|
||
|
|
* @author Mark Macdonald
|
||
|
|
*/
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Helpers
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if the given node is the argument of a typeof operator.
|
||
|
|
* @param {ASTNode} node The AST node being checked.
|
||
|
|
* @returns {boolean} Whether or not the node is the argument of a typeof operator.
|
||
|
|
*/
|
||
|
|
function hasTypeOfOperator(node) {
|
||
|
|
const parent = node.parent;
|
||
|
|
|
||
|
|
return parent.type === "UnaryExpression" && parent.operator === "typeof";
|
||
|
|
}
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Rule Definition
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
meta: {
|
||
|
|
docs: {
|
||
|
|
description: "disallow the use of undeclared variables unless mentioned in `/*global */` comments",
|
||
|
|
category: "Variables",
|
||
|
|
recommended: true
|
||
|
|
},
|
||
|
|
|
||
|
|
schema: [
|
||
|
|
{
|
||
|
|
type: "object",
|
||
|
|
properties: {
|
||
|
|
typeof: {
|
||
|
|
type: "boolean"
|
||
|
|
}
|
||
|
|
},
|
||
|
|
additionalProperties: false
|
||
|
|
}
|
||
|
|
]
|
||
|
|
},
|
||
|
|
|
||
|
|
create(context) {
|
||
|
|
const options = context.options[0];
|
||
|
|
const considerTypeOf = options && options.typeof === true || false;
|
||
|
|
|
||
|
|
return {
|
||
|
|
"Program:exit"(/* node */) {
|
||
|
|
const globalScope = context.getScope();
|
||
|
|
|
||
|
|
globalScope.through.forEach(ref => {
|
||
|
|
const identifier = ref.identifier;
|
||
|
|
|
||
|
|
if (!considerTypeOf && hasTypeOfOperator(identifier)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
context.report({
|
||
|
|
node: identifier,
|
||
|
|
message: "'{{name}}' is not defined.",
|
||
|
|
data: identifier
|
||
|
|
});
|
||
|
|
});
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
};
|