@maniascript/mslint/dist/lib/rules/no-self-compare.js

ManiaScript linter

import {} from '../linter/rule.js';
import { BinaryExpression, BinaryOperator } from '@maniascript/parser';
import { sameTokens } from '../linter/ast-utils.js';
export const noSelfCompare = {
    meta: {
        id: 'no-self-compare',
        description: 'Forbid comparisons where both sides are the same',
        recommended: true
    },
    create(context) {
        return {
            'BinaryExpression:enter': (node) => {
                if (node instanceof BinaryExpression && (node.operator === BinaryOperator['!='] ||
                    node.operator === BinaryOperator['<'] ||
                    node.operator === BinaryOperator['<='] ||
                    node.operator === BinaryOperator['=='] ||
                    node.operator === BinaryOperator['>'] ||
                    node.operator === BinaryOperator['>=']) &&
                    sameTokens(node.left, node.right, context.tokens)) {
                    context.report(node, 'Comparing to itself is probably an error');
                }
            }
        };
    }
};