.NET 5.0 .NET Core 2.2 .NET Standard 2.0 .NET Framework 2.0
dotnet add package YaccLexTools.Gppg --version
NuGet\Install-Package YaccLexTools.Gppg -Version
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="YaccLexTools.Gppg" Version="" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add YaccLexTools.Gppg --version
#r "nuget: YaccLexTools.Gppg,"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install YaccLexTools.Gppg as a Cake Addin
#addin nuget:?package=YaccLexTools.Gppg&version=

// Install YaccLexTools.Gppg as a Cake Tool
#tool nuget:?package=YaccLexTools.Gppg&version=

Project Description

GPPG is a parser generator that produces parsers written in the C# V2 or higher. The input language is YACC-like, and the parsers are LALR(1), with the usual automatic disambiguations. Designed to work with GPLEX.

This repository now has the full documentation for the parser-generator.


GPPG generates bottom-up parsers. The generated parsers recognize languages that are LALR(1), with the traditional yacc disambiguations. There are a number of extensions of the traditional input language that are necessary for correctness of the generated C# output files.

The generated parsers are designed to interface cleanly with scanners generated by Gardens Point LEX. However, gppg-generated scanners have been successfully used with both handwritten scanners and with scanners generated by COCO/R.

A particular feature of the tool is the optional generation of an html report file that allows easy navigation of the finite state automaton that recognizes the viable prefixes of the specified language. This report shows the production items, lookahead symbols and actions for each state of the automaton. It also optionally shows an example of a shortest input, and shortest FSA-path reaching each state. This report file considerably simplifies the diagnosis of grammar conflicts.

Examples Of Use

There are a small number of examples of use included in the download package, and these are fully discussed in the documentation. For a more complex example GPLEX and this companion GPPG tool each themselves use scanners and parsers generated by GPLEX and GPPG. The examples discussed in the GPLEX and GPPG documentation have now been added to the distro as file GP-Examples.zip.


The original version of GPPG was produced by Wayne Kelly at QUT. Further development and ongoing maintainence has been by John Gough.

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net20 net35 net40 net403 net45 net451 net452 net46 net461 net462 net463 net47 net471 net472 net48 net481
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETCoreApp 2.2

    • No dependencies.
  • .NETCoreApp 3.1

    • No dependencies.
  • .NETFramework 2.0

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.
  • net5.0

    • No dependencies.
  • net6.0

    • No dependencies.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on YaccLexTools.Gppg:

Package Downloads

This package includes GPPG 1.5.2 and GPLEX 1.2.2 tools for compiling YACC and LEX source files in your C# project.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated 8,545 5/3/2022