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@schungx schungx released this 14 Mar 14:48
v0.19.14
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Learn about vigilant mode.

This version runs faster due to optimizations done on AST node structures. It also fixes a number of panic bugs related to passing shared values as function call arguments.

Version 0.19.14 released to crates.io.

Bug fixes

  • Panic when passing a shared string into a registered function as &str argument is fixed.
  • Panic when calling switch statements on custom types is fixed.
  • Potential overflow panics in range(from, to, step) is fixed.
  • &mut String parameters in registered functions no longer panic when passed a string.
  • Some expressions involving shared variables now work properly, for example x in shared_value, return shared_value, obj.field = shared_value etc. Previously, the resultant value is still shared which is counter-intuitive.
  • Errors in native Rust functions now contain the correct function call positions.
  • Fixed error types in EvalAltResult::ErrorMismatchDataType which were swapped.

Breaking changes

  • Dynamic::as_str is removed because it does not properly handle shared values.
  • Zero step in the range function now raises an error instead of creating an infinite stream.
  • Error variable captured by catch is now an object map containing error fields.
  • EvalAltResult::clear_position is renamed EvalAltResult::take_position and returns the position taken.
  • private functions in an AST can now be called with call_fn etc.
  • NativeCallContext::call_fn_dynamic_raw no longer has the pub_only parameter.
  • Module::update_fn_metadata input parameter is changed.
  • Function keywords (e.g. type_of, eval, Fn) can no longer be overloaded. It is more trouble than worth. To disable these keywords, use Engine::disable_symbol.
  • is_def_var and is_def_fn are now reserved keywords.
  • Engine::id field is removed because it is never used.
  • num-traits is now a required dependency.
  • The in operator is now implemented on top of the contains function and is no longer restricted to a few specific types.
  • EvalAltResult::ErrorInExpr is removed because the in operator now calls contains.
  • The methods AST::walk, Expr::walk, Stmt::walk and ASTNode::walk and the callbacks they take now return bool to optionally terminate the recursive walk.

Enhancements

  • Layout of AST nodes is optimized to reduce redirections, so speed is improved.
  • Function calls are more optimized and should now run faster.
  • range function now supports negative step and decreasing streams (i.e. to < from).
  • More information is provided to the error variable captured by the catch statement in an object map.
  • Previously, private functions in an AST cannot be called with call_fn etc. This is inconvenient when trying to call a function inside a script which also serves as a loadable module exporting part (but not all) of the functions. Now, all functions (private or not) can be called in an AST. The private keyword is relegated to preventing a function from being exported.
  • Dynamic::as_unit just for completeness sake.
  • bytes method added for strings to get length quickly (if the string is ASCII-only).
  • FileModuleResolver can now enable/disable caching.
  • Recursively walking an AST can now be terminated in the middle.
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