Release Notes

4.0

Significantly improved the memory usage and performance of grammars that use left-recursion.
Re-implemented code expressions using the .NET Compiler Platform, allowing for unbalanced curly braces.
Positive assertions (&expr) now return the parse result rather than an empty string. BREAKING
Added composite grammar support:
- #parse{} expressions
- -export and -public flags
Added tracing support:
- @trace setting
- ITracer interface
- NullTracer and DiagnosticsTracer implementations
Implemented grammar-wide case-insensitivity:
- @ignorecase setting
- Explicit case-sensitivity for strings and character classes ("NASA"s and [A-Z]s)
Simplified the syntax of #state{} expressions to simply #{}.
Improved MSBuild integration:
- Regenerate parser classes when Pegasus is upgraded.
- Generate parser classes into the intermediate path (the obj/ folder). BREAKING
- Generate parser classes using the .g.cs file extension BREAKING
- Resolved some incremental build issues and added clean support.
- Specify multiple files to the same Pegasus.exe process.
Improved the Workbench:
- Fixed/improved error messages.
- Included the Workbench in NuGet package, under tools.
Relaxed some errors to warnings when they won't crash the parser.
Relaxed the restriction on #error{} expressions requiring them to appear at the end of a sequence.
Exposed the syntax highlighting classes used for the Workbench and the Visual Studio extension.