Source Structure Root Sources Source file Description lib.rs Crate root engine.rs The scripting engine, defines the Engine type tokenizer.rs Script tokenizer/lexer parser.rs Script parser optimizer.rs Script optimizer defer.rs Utilities for deferred clean-up of resources reify.rs Utilities for making generic types concrete tests.rs Unit tests (not integration tests, which are in the main tests sub-directory) Sub-Directories Sub-directory Description config Configuration types Common data types (e.g. Dynamic, errors) api Public API for the scripting engine ast AST definition module Support for modules packages Pre-defined packages func Registering and calling functions (native Rust and script-defined) eval AST evaluation serde Support for serde and metadata bin Pre-built CLI binaries