Rulewright.Extensions.Functions 0.3.0

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.8 This package targets .NET Framework 4.8. The package is compatible with this framework or higher. 
dotnet add package Rulewright.Extensions.Functions --version 0.3.0
                    


                    

                
NuGet\Install-Package Rulewright.Extensions.Functions -Version 0.3.0
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="Rulewright.Extensions.Functions" Version="0.3.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Rulewright.Extensions.Functions" Version="0.3.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Rulewright.Extensions.Functions" />
                    


                            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 Rulewright.Extensions.Functions --version 0.3.0
                    


                    

                
#r "nuget: Rulewright.Extensions.Functions, 0.3.0"
#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 Rulewright.Extensions.Functions@0.3.0
#: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=Rulewright.Extensions.Functions&version=0.3.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Rulewright.Extensions.Functions&version=0.3.0
                    


                            Install as a Cake Tool

Rulewright.Extensions.Functions

A curated catalog of ready-made predicates for Rulewright's custom operator, plus the helpers that register them.

Install

dotnet add package Rulewright.Extensions.Functions

Already included in Rulewright — install this directly only if you reference Rulewright.Execution piecewise.

Register them

var engine = new RulewrightBuilder()
    .UseJsonReader(new SystemTextJsonReader())
    .RegisterBuiltInFunctions()                       // the catalog below
    .RegisterFunctionsFrom(typeof(Program).Assembly)  // scan your own IRuleFunction classes
    .Build();

Then name one in a rule leaf:

{ "field": "Customer.Email", "operator": "custom", "name": "IsEmail" }
{ "field": "Customer.Age",   "operator": "custom", "name": "IsBetweenInclusive", "value": [18, 65] }

The catalog

Deliberately, these are the things Rulewright's closed operator vocabulary leaves out.

Function Checks
IsNullOrEmpty / IsNullOrWhiteSpace field is null, empty, or whitespace
EqualsIgnoreCase field equals the value, ignoring case (ordinal)
IsEmail field looks like an email address
IsEven / IsOdd field is an even / odd integer
IsPositive / IsNegative field is a number greater / less than zero
DivisibleBy field is an integer divisible by the value
IsBetweenInclusive field is within the [min, max] value array
IsWeekend / IsWeekday field date falls on a weekend / weekday
IsInPast / IsInFuture field date is before / after now

Every predicate is total: given a value of an unexpected shape it returns false rather than throwing, so a custom leaf can never crash an evaluation.

BuiltInFunctions.Create(clock) takes an injectable clock, so IsInPast/IsInFuture are deterministic under test.

Write your own

var isBusinessDay = new NamedRuleFunction(
    "IsBusinessDay",
    (field, value) => field is DateTime d && d.DayOfWeek is not (DayOfWeek.Saturday or DayOfWeek.Sunday),
    description: "Field date is a weekday.",
    valueKind: RuleFunctionValueKind.None);

NamedRuleFunction implements IRuleFunctionMetadata, so the description and value kind show up in engine.FunctionCatalog for a rule-builder UI to render.

Requirements

.NET Framework 4.8, .NET Standard 2.0, .NET 8.0 or .NET 10.0.

License

MIT.

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 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. 
.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 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 is compatible.  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)
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NuGet packages (1)

Showing the top 1 NuGet packages that depend on Rulewright.Extensions.Functions:

Package Downloads
Rulewright

The Rulewright rule engine — everything you need in one package: the core domain model, JSON parsing and schema validation, the expression-tree evaluation engine, the System.Text.Json adapter, and the built-in custom functions. Rules are plain JSON; evaluation is compiled expression trees. Install this unless you want to pick pieces individually.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
0.3.0 73 9/10/2026
0.1.1 127 8/29/2026

See https://github.com/albahadly/rulewright/releases for release notes.