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This is a library for parsing and evaluating Yarn Dialogue scripts in Rust games. It is designed to be embedded with game-provided hooks to affect the game state without making assumptions about how the dialogue will be displayed.

There are two main pieces:

  1. the YarnHandler trait, which provides hooks for the dialogue engine to call back into the game
  2. the YarnEngine type, which is responsible for parsing Yarn scripts and encapsulates the ongoing dialogue state

To begin a dialogue, call the YarnEngine::activate method. When it's time to move on from the current line of dialogue, call YarnEngine::proceed. If a choice is required in order to proceed, call YarnEngine::choose instead.

For an example of integrating yarn-spool into a game, look at the source of the example game.