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Sebastian Schmidt 2019-03-28 11:55:27 +01:00
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CHANGELOG.md
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@ -4,16 +4,21 @@
### Notes ### Notes
The 3.0.0 update includes further breaking changes that are necessary to allow assignments and chaining of expressions. The 3.0.0 update transforms the expression evaluator `evalexpr` to a tiny scripting language.
Rust does not allow trait objects to be converted into one another, even if one requires the other, so `ContextMut` had to be merged into `Context` for a more generic implementation of the (internal) `Operator` trait. It allows assignments and chaining of expressions.
Some changes in this update are breaking, hence the major release.
### Added ### Added
* Methods `Node::eval_<type>_with_context_mut` * Methods `Node::eval_<type>_with_context_mut` and crate level `eval_<type>_with_context_mut`
* Empty type and corresponding shortcut methods. The empty type is emitted by empty expressions or empty subexpressions `()`.
* The assignment operator `=`
* The expression chaining operator `;`
### Removed ### Removed
* Generic arguments from `Context` traits are now static to allow using trait objects of `Context` * Generic arguments from `Context` traits are now static to allow using trait objects of `Context`
* `EvalexprError::EmptyExpression` is not required anymore since empty expressions now evaluate to the empty type
### Changed ### Changed