Trellis.Analyzers 3.0.0-alpha.95

This is a prerelease version of Trellis.Analyzers.

dotnet add package Trellis.Analyzers --version 3.0.0-alpha.95

NuGet\Install-Package Trellis.Analyzers -Version 3.0.0-alpha.95

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="Trellis.Analyzers" Version="3.0.0-alpha.95" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="Trellis.Analyzers" Version="3.0.0-alpha.95" />
                    

                            Directory.Packages.props

<PackageReference Include="Trellis.Analyzers" />
                    

                            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 Trellis.Analyzers --version 3.0.0-alpha.95

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: Trellis.Analyzers, 3.0.0-alpha.95"

#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 Trellis.Analyzers@3.0.0-alpha.95

#: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=Trellis.Analyzers&version=3.0.0-alpha.95&prerelease
                    

                            Install as a Cake Addin

#tool nuget:?package=Trellis.Analyzers&version=3.0.0-alpha.95&prerelease
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Roslyn Analyzers

19 Roslyn analyzers that enforce proper usage of Result<T> and Maybe<T> patterns at compile time — catch unsafe access, unhandled results, and anti-patterns before they reach production.

Installation

dotnet add package Trellis.Analyzers

Analyzers integrate automatically into your build and provide warnings in Visual Studio, VS Code, and dotnet build.

What It Catches

Unsafe Access

// TRLS003: Unsafe Result.Value access
var user = GetUser(id);
Console.WriteLine(user.Value.Name);  // May throw

// Fix: Check first, or use Match
if (user.IsSuccess)
    Console.WriteLine(user.Value.Name);

Wrong Method Usage

// TRLS002: Map returns Result<Result<T>> — use Bind
var result = userId.Map(id => GetOrder(id));   // Double-wrapped

// Fix: Bind flattens
var result = userId.Bind(id => GetOrder(id));  // Result<Order>

Common Anti-Patterns

// TRLS007: TryCreate().Value — use Create() instead
var email = EmailAddress.TryCreate(input).Value;  // Poor error message

// Fix
var email = EmailAddress.Create(input);

All Rules

Rule	Title	Severity
TRLS001	Result return value is not handled	Warning
TRLS002	Use Bind instead of Map when lambda returns Result	Info
TRLS003	Unsafe access to Result.Value	Warning
TRLS004	Unsafe access to Result.Error	Warning
TRLS005	Consider using MatchError for error type discrimination	Info
TRLS006	Unsafe access to Maybe.Value	Warning
TRLS007	Use Create instead of TryCreate().Value	Warning
TRLS008	Result is double-wrapped (Result<Result<T>>)	Warning
TRLS009	Blocking on async Result (.Result or .Wait())	Warning
TRLS010	Use specific error type instead of base Error	Info
TRLS011	Maybe is double-wrapped (Maybe<Maybe<T>>)	Warning
TRLS012	Consider using Result.Combine	Info
TRLS013	Consider GetValueOrDefault or Match instead of ternary	Info
TRLS014	Use async method variant for async lambda	Warning
TRLS015	Don't throw exceptions in Result chains	Warning
TRLS016	Error message should not be empty	Warning
TRLS017	Don't compare Result or Maybe to null	Warning
TRLS018	Unsafe access to Value in LINQ expression	Warning
TRLS019	Combine chain exceeds maximum tuple size	Error

Configuration

Suppress or adjust rules using standard .NET mechanisms:

# .editorconfig
[*.cs]
dotnet_diagnostic.TRLS003.severity = suggestion
dotnet_diagnostic.TRLS012.severity = none

Trellis.Results — Core Result<T> and Maybe<T> types
Trellis.Asp — ASP.NET Core integration

License

MIT — see LICENSE for details.

There are no supported framework assets in this package.

Learn more about Target Frameworks and .NET Standard.

.NETStandard 2.0
- No dependencies.

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
3.0.0-alpha.95	0	3/2/2026
3.0.0-alpha.94	0	3/2/2026
3.0.0-alpha.93	28	3/1/2026
3.0.0-alpha.92	45	2/28/2026
3.0.0-alpha.83	30	2/27/2026