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Add initial project structure with Result type and extension methods

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This commit is contained in:
Robin Ehlert
2025-07-23 08:43:59 +02:00
commit 94ad6e57d7
7 changed files with 249 additions and 0 deletions
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6
.gitignore vendored Normal file
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bin/
obj/
.idea/
/packages/
riderModule.iml
/_ReSharper.Caches/

16
Rehlert.RoP.sln Normal file
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Microsoft Visual Studio Solution File, Format Version 12.00
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Rehlert.RoP", "Rehlert.RoP\Rehlert.RoP.csproj", "{C043B9E4-712D-4710-972E-1D89A31A9E2D}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{C043B9E4-712D-4710-972E-1D89A31A9E2D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{C043B9E4-712D-4710-972E-1D89A31A9E2D}.Debug|Any CPU.Build.0 = Debug|Any CPU
{C043B9E4-712D-4710-972E-1D89A31A9E2D}.Release|Any CPU.ActiveCfg = Release|Any CPU
{C043B9E4-712D-4710-972E-1D89A31A9E2D}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
EndGlobal

28
Rehlert.RoP/Extensions/FallbackExtensions.cs Normal file
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namespace Rehlert.RoP.Extensions;
public static class FallbackExtensions
{
public static TIn FallbackWith<TIn, TErr>(this Result<TIn, TErr> value, TIn defaultValue)
{
var result = value.Match(
ok => ok.Value,
_ => defaultValue
);
return result;
}
public static async Task<TIn> FallbackWith<TIn, TErr>(
this Task<Result<TIn, TErr>> value,
TIn defaultValue
)
{
var valRes = await value;
var result = valRes.Match(
ok => ok.Value,
_ => defaultValue
);
return result;
}
}

55
Rehlert.RoP/Extensions/OnErrorExtensions.cs Normal file
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namespace Rehlert.RoP.Extensions;
public static class OnErrorExtensions
{
public static Result<TIn, TErr> OnError<TIn, TErr>(this Result<TIn, TErr> value, Action<TErr> action)
{
value.Match(
_ => { },
err => action(err.Value)
);
return value;
}
public static async Task<Result<TIn, TErr>> OnError<TIn, TErr>(
this Result<TIn, TErr> value,
Func<TErr, Task> func
)
{
await value.Match(
_ => Task.CompletedTask,
err => func(err.Value)
);
return value;
}
public static async Task<Result<TIn, TErr>> OnError<TIn, TErr>(
this Task<Result<TIn, TErr>> value,
Func<TErr, Task> func
)
{
var valRes = await value;
await valRes.Match(
_ => Task.CompletedTask,
err => func(err.Value)
);
return valRes;
}
public static async Task<Result<TIn, TErr>> OnError<TIn, TErr>(
this Task<Result<TIn, TErr>> value,
Action<TErr> action
)
{
var valRes = await value;
valRes.Match(
_ => { },
err => action(err.Value)
);
return valRes;
}
}

118
Rehlert.RoP/Extensions/OnSuccessExtensions.cs Normal file
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namespace Rehlert.RoP.Extensions;
public static class OnSuccessExtensions
{
public static Result<TRes, TErr> OnSuccess<TIn, TErr, TRes>(this Result<TIn, TErr> value,
Func<TIn, Result<TRes, TErr>> func)
{
var result = value.Match(
ok => func(ok.Value),
err => err.Value
);
return result;
}
public static async Task<Result<TRes, TErr>> OnSuccess<TIn, TErr, TRes>(
this Result<TIn, TErr> value,
Func<TIn, Task<Result<TRes, TErr>>> func
)
{
var result = await value.Match(
ok => func(ok.Value),
err => Task.FromResult<Result<TRes, TErr>>(err.Value)
);
return result;
}
public static async Task<Result<TRes, TErr>> OnSuccess<TIn, TErr, TRes>(
this Task<Result<TIn, TErr>> value,
Func<TIn, Task<Result<TRes, TErr>>> func
)
{
var valRes = await value;
var result = await valRes.Match(
ok => func(ok.Value),
err => Task.FromResult<Result<TRes, TErr>>(err.Value)
);
return result;
}
public static async Task<Result<TRes, TErr>> OnSuccess<TIn, TErr, TRes>(
this Task<Result<TIn, TErr>> value,
Func<TIn, Result<TRes, TErr>> func
)
{
var valRes = await value;
var result = valRes.Match(
ok => func(ok.Value),
err => err.Value
);
return result;
}
public static async Task OnSuccess<TIn, TErr>(
this Task<Result<TIn, TErr>> value,
Func<TIn, Task> func
)
{
var valRes = await value;
await valRes.Match(
ok => func(ok.Value),
err => Task.CompletedTask
);
}
public static async Task OnSuccess<TIn, TErr>(
this Task<Result<TIn, TErr>> value,
Action<TIn> action
)
{
var valRes = await value;
valRes.Match(
ok => action(ok.Value),
_ => { }
);
}
public static async Task OnSuccess<TIn, TErr>(
this Result<TIn, TErr> value,
Func<TIn, Task> func
)
{
await value.Match(
ok => func(ok.Value),
_ => Task.CompletedTask
);
}
public static void OnSuccess<TIn, TErr>(
this Result<TIn, TErr> value,
Action<TIn> action
)
{
value.Match(
ok => action(ok.Value),
_ => { }
);
}
public static Result<(T1, T2), TErr> Combine<T1, T2, TErr>(this Result<T1, TErr> r1, Result<T2, TErr> r2)
{
if (r1 is Result<T1, TErr>.Error err)
return err.Value;
if (r2 is Result<T2, TErr>.Error err2)
return err2.Value;
return (r1.UnwrapOk().Value, r2.UnwrapOk().Value);
}
public static async Task<Result<(T1, T2), TErr>> Combine<T1, T2, TErr>(this Task<Result<T1, TErr>> r1,
Result<T2, TErr> r2)
{
var val = await r1;
return val.Combine(r2);
}
}

13
Rehlert.RoP/Rehlert.RoP.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net9.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Dunet" Version="1.11.3" />
</ItemGroup>
</Project>

13
Rehlert.RoP/Result.cs Normal file
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using Dunet;
namespace Rehlert.RoP;
[Union]
public partial record Result<TOk, TError>
where TOk : notnull
where TError : notnull
{
public partial record Ok(TOk Value);
public partial record Error(TError Value);
}