dotnet add package YaccLexTools.Gplex --version
NuGet\Install-Package YaccLexTools.Gplex -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.Gplex" Version="" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add YaccLexTools.Gplex --version
#r "nuget: YaccLexTools.Gplex,"
#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.Gplex as a Cake Addin
#addin nuget:?package=YaccLexTools.Gplex&version=

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

Project Description

GPLEX is a scanner generator which produces lexical scanners written in C# V2 or higher. The input language is similar to the original LEX specification language, but allows full 21-bit Unicode scanners to be specified.

This repository now includes the full documentation for the scanner-generator.


GPLEX generates scanners based around finite state automata. The generated automata have the number of states minimized by default, and have a large number of options for table compression. The default compression scheme is chosen depending on the input alphabet cardinality, and almost always gives a reasonable result. However a large number of options are available for the user to tune the behavior if necessary.

The tool implements many of the FLEX extensions, including such things as start-state stacks.

The generated scanners are designed to interface cleanly with bottom-up parsers generated by Gardens Point Parser Generator. However, gplex-generated scanners have been successfully used with both handwritten parsers and with parsers generated by COCO/R.

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 the companion GPPG tool each themselves use scanners and parsers generated by GPLEX and GPPG. The examples described in the documentation for GPPG and GPLEX have now been added to the distribution as file GP-Examples.zip.

There is a separate documentation file that deals with the special issues that arise with scanners that use the Unicode character set.

Is GPLEX What You Need?

GPLEX is a scanner generator. It is intended to be used to generate scanners for compilers or other tools that process text. It picks out non-overlapping substrings from within a continuing input stream, and returns an integer token identification. It may also be used for other simple regular expression recognition tasks, but is not a replacement for the System.Text.RegularExpressions classes. It does not have built-in mechanisms for multiple substring capture or anything similar.

GPLEX has historically had an approximately 2-per-year release cycle. If there is some feature that fits within the broad intention of the tool and which you feel is missing ... raise an issue. If what you really want is a C# version of AWK then GPLEX isn't it, and the copyright notice explains the conditions under which you may use code of GPLEX to help you implement AWK.NET yourself.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net20 is compatible.  net35 was computed.  net40 was computed.  net403 was computed.  net45 was computed.  net451 was computed.  net452 was computed.  net46 was computed.  net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
  • .NETFramework 2.0

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.
  • net6.0

    • No dependencies.
  • net7.0

    • No dependencies.
  • net8.0

    • No dependencies.

NuGet packages (1)

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

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 816 11/18/2023 175 11/13/2023 687 7/9/2023 15,864 5/3/2022