Chapter

Chapter is a fork of the yharnam repository which is a rust parser and "runner" for Yarn Spinner v1 files.

This version started as a fork, but it seems like the original is no longer maintained. This version updates the supported Yarn Spinner version to 2.3, and adds in additional methods and functions that were not originally implemented.

Currently it is only capable of running pre-compiled Yarn Spinner files. A parser for .yarn files is in progress.

NOTE to run tests you will need to download a copy of ysc, and use it to compile each of the test .yarn files.

Currently tested on Yarn Spinner 2.3.0.

Features

random

This feature is enabled by default

Use the random feature to enable random operations such as dice, random and random_range. An additional non-standard function random_test is provided. This takes a threshold between 0-1 and randomly generates a boolean based on whether a random number is above or below the threshold (see gen_bool from the rand crate).

In addition the random generator can be supplied a seed by calling vm.seed_random_generator(u64). See the random tests for an example.