Mastersign.Expressions 0.6.0

dotnet add package Mastersign.Expressions --version 0.6.0
NuGet\Install-Package Mastersign.Expressions -Version 0.6.0
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="Mastersign.Expressions" Version="0.6.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Mastersign.Expressions --version 0.6.0
#r "nuget: Mastersign.Expressions, 0.6.0"
#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 Mastersign.Expressions as a Cake Addin
#addin nuget:?package=Mastersign.Expressions&version=0.6.0

// Install Mastersign.Expressions as a Cake Tool
#tool nuget:?package=Mastersign.Expressions&version=0.6.0


A parser and compiler for a small EXCEL like expression language inside your .NET applications.

Mastersign.Expression is a small DSL (domain specific language) – a little like the MS EXCEL formular language. Its purpose is to provide a simple expression language with a set of predefined functions for math and string manipulation. Expressions are parsed via a parser, based on the Sprache parser framework, and compiled via System.Linq.Expressions into a lambda delegate, and can therefore, used repeatedly with acceptable performance.


Mastersign.Expression supports numeric, boolean and string literals, operators for numeric operations, string concatenation, logical combination and comparison. Grouping is done with parantheses. Function calls have a C-style-syntax. Functions, variables, constants, and parameters are provided via an evaluation context, which can be easily extended by the developer.

It comes with a set of predefined functions for math, string manipulation and regular expressions.

The evaluation context can be configured to ignore the case of operator keywords, literal keywords, variables, parameters, and function names. The quote style for strings can be configured too.

Expression Examples

  • 1 + 2
  • pi * (100f + 32.0/a)
  • "\tName: " & name
  • "result = " & (sin(pi * 2.0 + x) / 10)

Simple Usage Scenario

using System;
using Mastersign.Expressions;

static class Program
    static void Main()
        // create the evaluation context for the expression
        var context = new EvaluationContext();
        // load the default packages with functions and constants (math, string, ...)
        // add a custom variable
        context.SetVariable("x", 4);
        // add a custom function
        context.AddFunction("neg", (Func<double, double>)(v => -v));
        // set parameter list
        context.SetParameters(new ParameterInfo("a", typeof(int)));
        // compile the expression into a lamda delegate
        var fun = context.CompileExpression<int, double>("sin(pi * neg(10 + x)) + a");
        // call the delegate and write the result to the console


This project is published under the MIT license.

Copyright © by Tobias Kiertscher

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  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 was computed.  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 was computed.  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 net461 is compatible.  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)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.
  • .NETFramework 4.6.1

  • .NETStandard 2.0

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
0.6.0 439 6/10/2021
0.5.2 438 5/31/2021
0.5.1 383 5/25/2021
0.5.0 403 5/23/2021
0.4.3 1,625 12/10/2014