Welcome to your Langium VS Code Extension

What's in the folder

This folder contains all necessary files for your language extension.

package.json - this is the manifest file in which you declare your language support.
language-configuration.json - this is the language configuration, defining the tokens that are used for comments and brackets.
src/extension.ts - this is the main code of the extension, which is responsible for launching a language server and client.
src/language-server/language-id.langium - this is the grammar definition of your language.
src/language-server/main.ts - this is the entry point of the language server process.
src/language-server/language-id-module.ts - this is the dependency injection module of your language implementation. Use this to register overridden and added services.
src/language-server/language-id-validator.ts - this is an example validator. You should change it to reflect the semantics of your language.

Run npm run langium:generate to generate TypeScript code from the grammar definition.
Run npm run build to compile all TypeScript code.
Press F5 to open a new window with your extension loaded.
Create a new file with a file name suffix matching your language.
Verify that syntax highlighting, validation, completion etc. are working as expected.

Run npm run watch to have the TypeScript compiler run automatically after every change of the source files.
Run npm run langium:generate again after every change in the grammar definition.
You can relaunch the extension from the debug toolbar after making changes to the files listed above.
You can also reload (Ctrl+R or Cmd+R on Mac) the VS Code window with your extension to load your changes.

To start using your extension with VS Code, copy it into the <user home>/.vscode/extensions folder and restart Code.
To share your extension with the world, read on https://code.visualstudio.com/docs about publishing an extension.