@maniascript/mslint/dist/lib/rules/no-dupe-case.js

ManiaScript linter

import {} from '../linter/rule.js';
import { SwitchStatement } from '@maniascript/parser';
import { getNodeText, sameTokens } from '../linter/ast-utils.js';
export const noDupeCase = {
    meta: {
        id: 'no-dupe-case',
        description: 'Forbid duplicate case in switch statements',
        recommended: true
    },
    create(context) {
        return {
            'SwitchStatement:exit': (node) => {
                if (node instanceof SwitchStatement) {
                    const previousTests = [];
                    for (const switchCase of node.cases) {
                        for (const test of switchCase.tests) {
                            if (previousTests.some(previousTest => sameTokens(test, previousTest, context.tokens))) {
                                context.report(test, `Duplicate case '${getNodeText(test, context.tokens)}'`);
                            }
                            else {
                                previousTests.push(test);
                            }
                        }
                    }
                }
            }
        };
    }
};