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New syntax for package definition.

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This commit is contained in:
Stephen Chung
2022-02-10 12:33:48 +08:00
parent 1c89c6be4f
commit d1a97be9e3
18 changed files with 60 additions and 22 deletions
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CHANGELOG.md
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@@ -37,6 +37,7 @@ New features
* `Engine::set_fail_on_invalid_map_property` is added to control whether to raise an error (new `EvalAltResult::ErrorPropertyNotFound`) when invalid properties are accessed on object maps.
* `Engine::set_allow_shadowing` is added to allow/disallow variables _shadowing_, with new errors `EvalAltResult::ErrorVariableExists` and `ParseErrorType::VariableExists`.
* `Engine::on_def_var` allows registering a closure which can decide whether a variable definition is allow to continue, or should fail with an error.
* A new syntax for defining custom packages is introduced that removes the need to specify the Rhai crate name (internally uses the `$crate` meta variable).
Enhancements
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@@ -50,6 +51,7 @@ Enhancements
* `Expr::start_position` is added to give the beginning of the expression (not the operator's position).
* `StmtBlock` and `Stmt::Block` now keep the position of the closing `}` as well.
* `EvalAltResult::unwrap_inner` is added to access the base error inside multiple layers of wrappings (e.g. `EvalAltResult::ErrorInFunction`).
* Yet another new syntax is introduced for `def_package!` that further simplifies the old syntax.
REPL tool changes
-----------------