langium
Version:
A language engineering tool for the Language Server Protocol
38 lines • 1.81 kB
JavaScript
/******************************************************************************
* Copyright 2023 TypeFox GmbH
* This program and the accompanying materials are made available under the
* terms of the MIT License, which is available in the project root.
******************************************************************************/
import { createDefaultCoreModule, createDefaultSharedCoreModule } from '../default-module.js';
import { inject } from '../dependency-injection.js';
import * as ast from '../languages/generated/ast.js';
import { EmptyFileSystem } from '../workspace/file-system-provider.js';
import { URI } from './uri-utils.js';
const minimalGrammarModule = {
Grammar: () => undefined,
LanguageMetaData: () => ({
caseInsensitive: false,
fileExtensions: ['.langium'],
languageId: 'langium'
})
};
const minimalSharedGrammarModule = {
AstReflection: () => new ast.LangiumGrammarAstReflection()
};
function createMinimalGrammarServices() {
const shared = inject(createDefaultSharedCoreModule(EmptyFileSystem), minimalSharedGrammarModule);
const grammar = inject(createDefaultCoreModule({ shared }), minimalGrammarModule);
shared.ServiceRegistry.register(grammar);
return grammar;
}
/**
* Load a Langium grammar for your language from a JSON string. This is used by several services,
* most notably the parser builder which interprets the grammar to create a parser.
*/
export function loadGrammarFromJson(json) {
const services = createMinimalGrammarServices();
const astNode = services.serializer.JsonSerializer.deserialize(json);
services.shared.workspace.LangiumDocumentFactory.fromModel(astNode, URI.parse(`memory:/${astNode.name ?? 'grammar'}.langium`));
return astNode;
}
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