NFun 1.1.0

.NET 5.0 This package targets .NET 5.0. The package is compatible with this framework or higher. 
dotnet add package NFun --version 1.1.0
                    


                    

                
NuGet\Install-Package NFun -Version 1.1.0
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="NFun" Version="1.1.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="NFun" Version="1.1.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="NFun" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add NFun --version 1.1.0
                    


                    

                
#r "nuget: NFun, 1.1.0"
#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. 
#:package NFun@1.1.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=NFun&version=1.1.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=NFun&version=1.1.0
                    


                            Install as a Cake Tool

NFun — Expression Evaluator for .NET

Embeddable expression language with rich type system, absolute type inference, and LINQ-like collections.

PM> Install-Package NFun

Quick Start

// Simple evaluation
double d = Funny.Calc<double>("2 * 10 + 1"); // 21
bool b = Funny.Calc<bool>("false and (2 > 1)"); // false

// With input model
string alias = Funny.Calc<User, string>(
    "if(age < 18) name else 'Mr. {name}'", user);

// Multiple inputs and outputs
var person = new Person(birthYear: 2000);
Funny.CalcContext(@"
    age = 2022 - birthYear
    cars = [
        { name = 'lada',   cost = 1200, power = 102 },
        { name = 'camaro', cost = 5000, power = 275 }
    ]", person);

// Low-level API
var runtime = Funny.Hardcore.Build("y = 2x + 1");
runtime["x"].Value = 42;
runtime.Run();
var result = runtime["y"].Value; // 85

Key Features

Operators & Arithmetic

y1 = 2*(x//2 + 1) / (x % 3 - 1)**0.5 + 3x   # arithmetic, implicit multiplication
y2 = (x | y & 0xF0FF << 2) ^ 0x1234            # bitwise
y3 = x and false or not (y > 0)                  # logical

If-expressions

y = if(age > 18)
        if(weight > 100) 'heavy'
        if(weight > 50)  'normal'
        else 'light'
    if(age > 16) 'teen'
    else 'child'

Collections & Higher-Order Functions

out = [1,2,3,4,5]
    .filter(rule it > 2)
    .map(rule it * 10)
    .reverse()                  # [50, 40, 30]

Structs & Named Types

type point = {x: int, y: int}
p: point = {x = 3, y = 4}
dist = (p.x**2 + p.y**2)**0.5

Optional Types & Type Narrowing

user:{name: text, age: int}? = none
greeting = if(user == none) 'Guest'
           if(user.age > 18) 'Hello, {user.name}'
           else 'Hi, {user.name}'

Strict Type System with Full Inference

y = 2x                              # x and y inferred as Int32
z:int = y * x                       # explicit annotation
m:real[] = [1,2,3].map(rule it/2)   # [0.5, 1.0, 1.5]

Dialect Customization

var runtime = Funny.Hardcore
    .WithDialect(
        integerPreferredType: IntegerPreferredType.I64,
        integerOverflow: IntegerOverflow.Unchecked,
        optionalTypesSupport: OptionalTypesSupport.Enabled,
        namedTypesSupport: NamedTypesSupport.Enabled)
    .Build("y = 2x + 1");

Documentation

Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  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 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 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.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

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v1.1.0: Optional types (T?, none, ??, ?., ?[, !), named types, type narrowing, row polymorphism, format specifiers, try-catch, char literals, 150+ new built-in tests.