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feat: Remove runtime dependency on Riok.Mapperly.Abstractions
Creates a new Riok.Mapperly.Templates project with templates. Some Mapperly features may require such a template (currently only the reference handling). If such a template is required by a used Mapperly feature, Mapperly emites the template in a namespace which includes the name of the assembly of the target project. This is done to prevent collisions when using InternalsVisibleTo (see riok#685). Currently the only themplate is the PreserveReferenceHandler which is emitted if reference handling is enabled for any mapper and the mapper does have mapper method definitions without a reference handling parameter and Mapperly needs to instantiate a IReferenceHandler.
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63 changes: 0 additions & 63 deletions
63
src/Riok.Mapperly.Abstractions/ReferenceHandling/Internal/PreserveReferenceHandler.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| # keep namespaces block scoped, because .NET Framework language version does not support this | ||
| [*.cs] | ||
| csharp_style_namespace_declarations = block_scoped:warning |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Diagnostics.CodeAnalysis; | ||
| using System.Runtime.CompilerServices; | ||
| using Riok.Mapperly.Abstractions.ReferenceHandling; | ||
|
|
||
| #nullable enable | ||
|
|
||
| namespace Riok.Mapperly.Internal.AssemblyName | ||
| { | ||
| /// <summary> | ||
| /// A <see cref="IReferenceHandler"/> implementation | ||
| /// which returns the same target object instance if encountered the same source object instance. | ||
| /// Do not use directly. Should only be used by Mapperly generated code. | ||
| /// API surface is not subject to semantic releases and may break in any release. | ||
| /// </summary> | ||
| internal sealed class PreserveReferenceHandler : IReferenceHandler | ||
| { | ||
| private readonly Dictionary<(Type, Type), ReferenceHolder> _referenceHolders = new(); | ||
|
|
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| /// <inheritdoc cref="IReferenceHandler.TryGetReference{TSource,TTarget}"/> | ||
| #if NETSTANDARD2_0 || NETFRAMEWORK || NETCOREAPP2X | ||
| #nullable disable | ||
| public bool TryGetReference<TSource, TTarget>(TSource source, out TTarget target) | ||
| #nullable enable | ||
| #else | ||
| public bool TryGetReference<TSource, TTarget>(TSource source, [NotNullWhen(true)] out TTarget? target) | ||
| #endif | ||
| where TSource : notnull | ||
| where TTarget : notnull | ||
| { | ||
| var refHolder = GetReferenceHolder<TSource, TTarget>(); | ||
| return refHolder.TryGetRef(source, out target); | ||
| } | ||
|
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| /// <inheritdoc cref="IReferenceHandler.SetReference{TSource,TTarget}"/> | ||
| public void SetReference<TSource, TTarget>(TSource source, TTarget target) | ||
| where TSource : notnull | ||
| where TTarget : notnull => GetReferenceHolder<TSource, TTarget>().SetRef(source, target); | ||
|
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| private ReferenceHolder GetReferenceHolder<TSource, TTarget>() | ||
| { | ||
| var mapping = (typeof(TSource), typeof(TTarget)); | ||
| if (_referenceHolders.TryGetValue(mapping, out var refHolder)) | ||
| return refHolder; | ||
|
|
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| return _referenceHolders[mapping] = new(); | ||
| } | ||
|
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| private sealed class ReferenceEqualityComparer<T> : IEqualityComparer<T> | ||
| { | ||
| // cannot use System.Collections.Generic.ReferenceEqualityComparer since it is not available in netstandard2.0 | ||
|
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| public static readonly IEqualityComparer<T> Instance = new ReferenceEqualityComparer<T>(); | ||
|
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| private ReferenceEqualityComparer() { } | ||
|
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| bool IEqualityComparer<T>.Equals(T? x, T? y) => ReferenceEquals(x, y); | ||
|
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| int IEqualityComparer<T>.GetHashCode(T obj) => RuntimeHelpers.GetHashCode(obj); | ||
| } | ||
|
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| private class ReferenceHolder | ||
| { | ||
| private readonly Dictionary<object, object> _references = new(ReferenceEqualityComparer<object>.Instance); | ||
|
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| public bool TryGetRef<TSource, TTarget>(TSource source, [NotNullWhen(true)] out TTarget? target) | ||
| where TSource : notnull | ||
| where TTarget : notnull | ||
| { | ||
| if (_references.TryGetValue(source, out var targetObj)) | ||
| { | ||
| target = (TTarget)targetObj; | ||
| return true; | ||
| } | ||
|
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| target = default; | ||
| return false; | ||
| } | ||
|
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| public void SetRef<TSource, TTarget>(TSource source, TTarget target) | ||
| where TSource : notnull | ||
| where TTarget : notnull | ||
| { | ||
| _references[source] = target; | ||
| } | ||
| } | ||
| } | ||
| } |
42 changes: 42 additions & 0 deletions
42
src/Riok.Mapperly.Templates/Riok.Mapperly.Templates.csproj
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <TargetFramework>netstandard2.0</TargetFramework> | ||
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| <!-- | ||
| AssemblyName is replaced by the source generator | ||
| with the name of the assembly of the target project. | ||
| This is done to reduce type name collisions when | ||
| InternalsVisibleTo is used in another project, | ||
| which needs the same generated templated type. | ||
| --> | ||
| <RootNamespace>Riok.Mapperly.Internal.AssemblyName</RootNamespace> | ||
|
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| <!-- | ||
| disable nullable and enable it for each file individually, | ||
| as the target application may not have nullables enabled | ||
| --> | ||
| <Nullable>disable</Nullable> | ||
|
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| <!-- disable global usings as the target application may not have them enabled --> | ||
| <ImplicitUsings>disable</ImplicitUsings> | ||
|
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| <!-- | ||
| do not use polyfills for the templates, | ||
| since we only copy the cs files in the directory and we do not know | ||
| whether the polyfills would be required in the target application. | ||
| --> | ||
| <MeziantouPolyfill_ExcludedPolyfills>*</MeziantouPolyfill_ExcludedPolyfills> | ||
| </PropertyGroup> | ||
|
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| <ItemGroup> | ||
| <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute"> | ||
| <_Parameter1>Riok.Mapperly.Templates.Tests</_Parameter1> | ||
| </AssemblyAttribute> | ||
| </ItemGroup> | ||
|
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| <ItemGroup> | ||
| <ProjectReference Include="..\Riok.Mapperly.Abstractions\Riok.Mapperly.Abstractions.csproj"/> | ||
| </ItemGroup> | ||
|
|
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| </Project> |
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