/
no-explicit-any.ts
83 lines (80 loc) · 2.07 KB
/
no-explicit-any.ts
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import {
TSESTree,
AST_NODE_TYPES,
} from '@typescript-eslint/experimental-utils';
import * as util from '../util';
export default util.createRule({
name: 'no-explicit-any',
meta: {
type: 'suggestion',
docs: {
description: 'Disallow usage of the `any` type',
category: 'Best Practices',
recommended: 'warn',
},
messages: {
unexpectedAny: 'Unexpected any. Specify a different type.',
},
schema: [
{
type: 'object',
additionalProperties: false,
properties: {
ignoreRestArgs: {
type: 'boolean',
},
},
},
],
},
defaultOptions: [
{
ignoreRestArgs: false,
},
],
create(context, [{ ignoreRestArgs }]) {
/**
* Checks if the node parent is a function declaration
* @param node the node to be validated.
* @returns true if the node parent is a function declaration
* @private
*/
function isParentFunctionDeclaration(node: TSESTree.Node): boolean {
return (
typeof node.parent !== 'undefined' &&
node.parent.type === AST_NODE_TYPES.FunctionDeclaration
);
}
/**
* Checks if the node great granparent is a rest element
* @param node the node to be validated.
* @returns true if the node great granparent is a rest element
* @private
*/
function isGreatGrandparentRestElementInFunctionDeclaration(
node: TSESTree.Node,
): boolean {
return (
typeof node.parent !== 'undefined' &&
typeof node.parent.parent !== 'undefined' &&
typeof node.parent.parent.parent !== 'undefined' &&
node.parent.parent.parent.type === AST_NODE_TYPES.RestElement &&
isParentFunctionDeclaration(node.parent.parent.parent)
);
}
return {
TSAnyKeyword(node) {
if (
ignoreRestArgs &&
isGreatGrandparentRestElementInFunctionDeclaration(node)
) {
return;
}
context.report({
node,
messageId: 'unexpectedAny',
});
},
};
},
});