langium-cli/lib/generator/types-generator.js

CLI for Langium - the language engineering tool

import { joinToNode, toString } from 'langium/generate';
import { collectAst, LangiumGrammarGrammar } from 'langium/grammar';
import { collectKeywords } from './langium-util.js';
export function generateTypesFile(services, grammars) {
    const { unions, interfaces } = collectAst(grammars, { services });
    const reservedWords = new Set(collectKeywords(LangiumGrammarGrammar()));
    const fileNode = joinToNode([
        joinToNode(unions, union => union.toDeclaredTypesString(reservedWords), { appendNewLineIfNotEmpty: true }),
        joinToNode(interfaces, iFace => iFace.toDeclaredTypesString(reservedWords), { appendNewLineIfNotEmpty: true })
    ]);
    return toString(fileNode);
}
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