AlinSpace.Optional 1.0.3

Prefix Reserved

dotnet add package AlinSpace.Optional --version 1.0.3

NuGet\Install-Package AlinSpace.Optional -Version 1.0.3

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="AlinSpace.Optional" Version="1.0.3" />

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

<PackageVersion Include="AlinSpace.Optional" Version="1.0.3" />
                    

                            Directory.Packages.props

<PackageReference Include="AlinSpace.Optional" />
                    

                            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 AlinSpace.Optional --version 1.0.3

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

#r "nuget: AlinSpace.Optional, 1.0.3"

#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.

#addin nuget:?package=AlinSpace.Optional&version=1.0.3
                    

                            Install AlinSpace.Optional as a Cake Addin

#tool nuget:?package=AlinSpace.Optional&version=1.0.3
                    

                            Install AlinSpace.Optional as a Cake Tool

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

AlinSpace.Optional

AlinSpace Optional Types.

Why?

In C# reference types can either point to an object (be not "null") or not point to any object (be "null"). Value types can't be "null".

However, both reference and value types can be "default". But "default" does not mean the same for reference and value types. For reference types it means "null" and for value types it means the default value (e.g. for integer it is 0).

Optionals help with this problem, by making both reference and value types behave the same.

Examples

The following optional contains the value 5:

Optional<int> optional = Optional<int>.Some(5);

// Same as above.
Optional<int> optional = 5;

optional.HasValue // true
optional.HasNoValue // false
optional.Value // 5
optional.ValueOrDefault // 5

The following optional contains no value:

Optional<int> optional = Optional<int>.None();

optional.HasValue // false
optional.HasNoValue // true
optional.Value // throws OptionalHasNoValueException
optional.ValueOrDefault // 0

However be careful about "default". The optional will have a value:

Optional<int> optional = default;

optional.HasValue // true
optional.HasNoValue // false
optional.Value // 0
optional.ValueOrDefault // 0

Product	Compatible and additional computed target framework versions.
.NET	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 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. 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.

Product

.NET

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net6.0
- 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.