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Rhai v1.8.0 Release Notes

  • 🐛 Bug fixes

    • Self-contained AST now works properly with Engine::call_fn.
    • Missing to_int from Decimal is added.
    • 📜 Parsing of index expressions is relaxed and many cases no longer result in an index-type error to allow for custom indexers.
    • 🔀 Merging or combining a self-contained AST into another AST now works properly.
    • 🔌 Plugin modules/functions no longer generate errors under #![deny(missing_docs)].
    • Calling a property on a function call that returns a shared value no longer causes an error.
    • Strict Variables Mode now checks for module namespaces within functions as well.
    • Module defined via Engine::register_static_module are now checked in Strict Variables Mode.

    Reserved Symbols

    • ?, ??, ?., ?[ and !. are now reserved symbols.

    🗄 Deprecated API's

    • 🗄 FnPtr::num_curried is deprecated in favor of FnPtr::curry().len().

    🆕 New features

    • The Elvis operators (?. and ?[) are now supported for property access, method calls and indexing.
    • The null-coalescing operator (??) is now supported to short-circuit () values.

    ✨ Enhancements

    • Indexing and property access are now faster.
    • EvalAltResult::IndexNotFound is added to aid in raising errors for indexers.
    • 🏷 Engine::def_tag, Engine::def_tag_mut and Engine::set_tag are added to manage a default value for the custom evaluation state, accessible via EvalState::tag() (which is the same as NativeCallContext::tag()).
    • Originally, the debugger's custom state uses the same state as EvalState::tag() (which is the same as NativeCallContext::tag()). It is now split into its own variable accessible under Debugger::state().
    • Non-borrowed string keys can now be deserialized for object maps via serde.
    • Scope::get is added to get a reference to a variable's value.
    • Variable resolvers can now return a shared value which can be mutated.