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

ManiaScript linter

import {} from '../linter/rule.js';
import { AssignmentOperator, AssignmentStatement, Identifier } from '@maniascript/parser';
import { getNodeText } from '../linter/ast-utils.js';
export const noSelfAssign = {
    meta: {
        id: 'no-self-assign',
        description: 'Forbid assignments where both sides are the same',
        recommended: true
    },
    create(context) {
        return {
            'AssignmentStatement:enter': (node) => {
                if (node instanceof AssignmentStatement && (node.operator === AssignmentOperator['='] ||
                    node.operator === AssignmentOperator['<=>']) &&
                    node.left instanceof Identifier &&
                    node.right instanceof Identifier &&
                    node.left.namespace === node.right.namespace &&
                    node.left.name === node.right.name) {
                    context.report(node, `'${getNodeText(node.left, context.tokens)}' is assigned to itself`);
                }
            }
        };
    }
};