@Command / CommandHistory

Command pattern — encapsulate actions with execute() and optional undo(); stack them in CommandHistory.

Kind	Runtime
Backends	legacy, stage3
Requires generate	No

Example

import { Command, CommandHistory } from 'lombok-typescript/legacy';

@Command
class InsertText {
  constructor(
    private editor: { text: string },
    private chunk: string,
  ) {}

  execute() {
    this.editor.text += this.chunk;
  }

  undo() {
    this.editor.text = this.editor.text.slice(0, -this.chunk.length);
  }
}

const history = new CommandHistory();
history.execute(new InsertText({ text: '' }, 'Hello'));
history.undo();
history.redo();

@Command validates that execute() exists when the class is decorated.