PolySharp provides generated, source-only polyfills for C# language features, to easily use all runtime-agnostic features downlevel. Add a reference, set your C# version to latest and have fun! 🚀
License: MIT License
Slicing arrays is a fairly common task, and a workaround is simple.
Optional property flag in .csproj to alias System.Runtime.CompilerServices.RuntimeHelpers
<PolySharpAliasRuntimeHelpers>true</PolySharpAliasRuntimeHelpers>Obvious, see previous discussion in #8
Not sure there's any other way to support modern C# range syntax for arrays and spans.
minimal example, excluding everything else from RuntimeHelpers
public static partial class RuntimeHelpers {
// runtime support for range operator eg `myarray[0..5]`
public static T[] GetSubArray<T>(T[] array, System.Range range) {
var (offset, length) = range.GetOffsetAndLength(array.Length);
if (length == 0)
return Array.Empty<T>();
T[] dest;
if (typeof(T).IsValueType || typeof(T[]) == array.GetType()) {
// We know the type of the array to be exactly T[] or an array variance
// compatible value type substitution like int[] <-> uint[].
if (length == 0)
return Array.Empty<T>();
dest = new T[length];
}
else {
// The array is actually a U[] where U:T. We'll make sure to create
// an array of the exact same backing type. The cast to T[] will
// never fail.
dest = (T[])(Array.CreateInstance(array.GetType().GetElementType(), length));
}
Array.Copy(array, offset, dest, 0, length);
return dest;
}
}I got compiler error CS8400 Feature 'init-only setters' is not available in C# 8.0. Please use language version 9.0 or greater. when compiling a .NET Standard 2.0 class library with C# 8.0 as the LangVersion. Upgrading to 9.0 fixed the issue but should not be nesessary.
Create a Class Library using the following .csproj content and this class Product.cs
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netstandard2.0</TargetFramework>
<LangVersion>8.0</LangVersion>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="PolySharp" Version="1.6.0" />
</ItemGroup>
</Project>using System.Diagnostics.CodeAnalysis;
namespace ClassLibrary19 {
public class Product {
[AllowNull]
public string ProductName { get; set; }
}
}No compiler error
error CS8400
This section should contain useful info such as:
Any additional info that might be useful to resolve the issue.
In System.Diagnostics.CodeAnalysis are attributes which I would like to use in .netstandard2.0 target projects.
There are a lot of attributes there, which I would like to use:
https://learn.microsoft.com/de-de/dotnet/api/system.diagnostics.codeanalysis?view=net-7.0
e.g. [NotNullWhenAttribute]
The existing nuget is not working correctly: https://www.nuget.org/packages/Compat.System.Diagnostics.CodeAnalysis/
the package points to other repository https://github.com/Sergio0694/ComputeSharp/
from #68
PolySharp provides generated, source-only polyfills for C# language features, to easily use all runtime-agnostic features downlevel
I know what source generators are, and I know what polyfills are (in general). But I do not know what it means when you say "source-only polyfills for C# language features, to easily use all runtime-agnostic features downlevel"
Being someone who is well versed in .NET and C#, I can't help but think that you'll get more interest in your project if you explain these concepts better in your readme. Maybe even provide some examples.
The names of the attributes listed in the readme peak my interest, but I do know that some of those attributes already exist... And without further information, I can't invest the time to see if it makes sense for me.
I figured it was worth writing this issue, thinking that maybe there are others like me.
Support for [GeneratedRegex] attribute. MS Docs
This is the new .Net 8 way of having static readonly regexes in code:
[GeneratedRegex(@"^by\(\s*(?<var>[a-zA-Z_][a-zA-Z0-9_]*)\s*\)")]
private static partial Regex MyRegex();
private static readonly Regex _byForm = MyRegex();Prior to .Net 8, this is required:
private static readonly Regex _byForm = new(@"^by\(\s*(?<var>[a-zA-Z_][a-zA-Z0-9_]*)\s*\)");which is arguably cleaner, but it means that regex table lookups are performed at runtime instead of at compile time. (I expect my usage isn't an ideal example.)
No proposal
None
None
None.
C# 10 support Interpolated string handler and add DefaultInterpolatedStringHandler in net6.
If one project references two other projects that both have InternalsVisibleTo to the first project defined, the first project can't use C# features that should be enabled by PolySharp.
<LangVersion>11.0</LangVersion> for all projects.<ItemGroup><InternalsVisibleTo Include="ThirdProjectName" /></ItemGroup> to the referenced projects.Should be able to compile the code.
I get compile errors about missing compiler required members.
This section should contain useful info such as:
It looks like the compiler error is missleading. The members are not missing, they are there multiple times (so the compiler sees the internal types from both referenced projects). If only one referenced project with InternalsVisibleTo exists then no error happens.
It looks like PolySharp also sees the internal types of the other projects and doesn't generate any additional types. (It only generates the TypeForwards.)
But I can actually fix the problem and compile my code when I manually add the required compiler types. Then the compiler doesn't error any more, even though it should then actually see each type 3 times.
So maybe the fix for this would be to still generate the required types if the source generator only finds an internal type from another assembly in the current project?
In my actual solution I don't add PolySharp to each project individually but instead use Global Package References. But it seems like this doesn't change anything for this problem.
In #86 you said
generate type forwards to ensure things work as expected in multi-targeting scenarios
Could you please elaborate a little bit more on this? What exact problem does it solve to add TypeForwardedTo attributes in target frameworks where the type exists?
For example, when multi-targeting net7.0;net6.0;netstandard2.0 the source generator produces this for .NET 6 and .NET 7 targets:
[assembly: global::System.Runtime.CompilerServices.TypeForwardedTo(typeof(global::System.Runtime.CompilerServices.IsExternalInit))]If I add <PolySharpExcludeTypeForwardedToDeclarations>true</PolySharpExcludeTypeForwardedToDeclarations> they are not generated and everything seems to work fine. Am I missing something?
Thanks for the project, looking forward its evolution!
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netstandard2.0</TargetFramework>
<LangVersion>Latest</LangVersion>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="PolySharp" Pack="false" Version="1.3.0" />
</ItemGroup>
</Project>namespace Poly;
internal class Class1
{
readonly string[] ns = "Foo.Bar.Baz".Split('.')[..^1];
}This works with PolyFill.NET but not
PolyShary. Build error is:
Class1.cs(9,53,9,57): error CS0656: Missing compiler required member 'System.Runtime.CompilerServices.RuntimeHelpers.GetSubArray'
Please add the following class in the System.ComponentModel.DataAnnotations namespace.
These classes will be added to the BCL in .NET 8.0, but will not be released as nuget package, so they are not available on platforms prior to .NET 8.0.
Add an extension to KeyValuePair<TKey, TValue> that mirrors https://learn.microsoft.com/en-US/dotnet/api/system.collections.generic.keyvaluepair-2.deconstruct?view=net-7.0
The extension allows for KeyValuePairs to be deconstructed in scenarios such as
foreach ((var k, var v) in dict)
{
// ...
}https://learn.microsoft.com/en-US/dotnet/api/system.collections.generic.keyvaluepair-2.deconstruct?view=net-7.0 Allows the compiler to deconstruct KeyValuePairs in tuple patterns or other tuple-like scenarios
Not known
Not known
None
I reference this package in netframework4.8, but how do I change the language version, by adding a [Directory.Build.props] file?
I created Console App for .NET Framework 4.7.2 and added to the project file 11.0. I installed the PolySharp package .I don't see that it produces some source generators files and i got the exceptions from the compiler.. will be appreciate for advise what i did wrong. I didn't see the Polysharp in my References list but there is packages.config file and there is a reference there. I attached zip file with a solution. There are 2 projects in solution. Please look on ConsolePolysharp2. Thank you!
ConsolePolySharp.zip
in my netframework4.8 console project, after added reference to polysharp, and set language version to C#11.0, there is no source file generated, and when i use required and init in my code, there is build error occured
I have a legacy ASP.NET MVC application built with .NET Framework 4.8, and I'm unable to use constructors of types with required members in a .cshtml file. I have installed PolySharp in this project, but I have a feeling something else is required to make it work in .cshtml files.
The error message I'm getting is: 'Constructors of types with required members are not supported in this version of your compiler.'.
Detailed compiler output:
Microsoft (R) Visual C# Compiler version 4.1.0-5.22114.11 (260d16a8)
Copyright (C) Microsoft Corporation. All rights reserved.C:\Projects\MyProject\MyProject.Web.Mvc\Views\Shared\_Layout.cshtml(228,123): error CS0619: 'App.App()' is obsolete: 'Constructors of types with required members are not supported in this version of your compiler.'
I'm using the latest Roslyn CodeDOM provider (4.1.0), which is updated to support ./langversion:11.0
I have the following configuration in my Web.config:
<system.codedom>
<compilers>
<compiler extension=".cs" language="c#;cs;csharp" warningLevel="4"
compilerOptions="/langversion:11.0"
type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
<compiler extension=".vb" language="vb;vbs;visualbasic;vbscript" warningLevel="4"
compilerOptions="/langversion:11.0 /define:_MYTYPE=\"Web\" /optionInfer+"
type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
</compilers>
</system.codedom>
So far I haven't been able to get constructors of types with required members to work in .cshtml files. I wonder if it's even possible? Maybe the Roslyn CodeDOM provider needs to reference PolySharp as well?
There is no error with project using packages.config, but there is an error with projects using new SDK msbuild.
I don't know about that how csproj file works. what I should do to solve this? or it is bug?
Severity Code Description Project File Line Suppression State
Error CS8179 Predefined type 'System.ValueTuple`2' is not defined or imported NET35LibraryNewProj C:\Users\02jy0\source\repos\NET35LibraryNewProj\PolySharp.SourceGenerators\PolySharp.SourceGenerators.PolyfillsGenerator\System.Range.g.cs 76 Active
Error CS8137 Cannot define a class or member that utilizes tuples because the compiler required type 'System.Runtime.CompilerServices.TupleElementNamesAttribute' cannot be found. Are you missing a reference? NET35LibraryNewProj C:\Users\02jy0\source\repos\NET35LibraryNewProj\PolySharp.SourceGenerators\PolySharp.SourceGenerators.PolyfillsGenerator\System.Range.g.cs 76 Active
Error CS0117 'MethodImplOptions' does not contain a definition for 'AggressiveInlining' NET35LibraryNewProj C:\Users\02jy0\source\repos\NET35LibraryNewProj\PolySharp.SourceGenerators\PolySharp.SourceGenerators.PolyfillsGenerator\System.Index.g.cs 28 Active
Error CS0117 'MethodImplOptions' does not contain a definition for 'AggressiveInlining' NET35LibraryNewProj C:\Users\02jy0\source\repos\NET35LibraryNewProj\PolySharp.SourceGenerators\PolySharp.SourceGenerators.PolyfillsGenerator\System.Index.g.cs 56 Active
Error CS0117 'MethodImplOptions' does not contain a definition for 'AggressiveInlining' NET35LibraryNewProj C:\Users\02jy0\source\repos\NET35LibraryNewProj\PolySharp.SourceGenerators\PolySharp.SourceGenerators.PolyfillsGenerator\System.Index.g.cs 69 Active
Error CS0117 'MethodImplOptions' does not contain a definition for 'AggressiveInlining' NET35LibraryNewProj C:\Users\02jy0\source\repos\NET35LibraryNewProj\PolySharp.SourceGenerators\PolySharp.SourceGenerators.PolyfillsGenerator\System.Index.g.cs 103 Active
Error CS0117 'MethodImplOptions' does not contain a definition for 'AggressiveInlining' NET35LibraryNewProj C:\Users\02jy0\source\repos\NET35LibraryNewProj\PolySharp.SourceGenerators\PolySharp.SourceGenerators.PolyfillsGenerator\System.Range.g.cs 75 Active
with packages.config
with new SDK
I have added your library to my WinFroms project (.NEt Framework) to use Nullability attributes with static analyzers. Even though I added the attribute, the analyzer still analyzes nulls incorrectly.
See code below
Static analyzer do not trigger CS8602 Dereference of a possibly null reference.
This section should contain useful info such as:
As documented in nuget you can provide
not only the repo URL, type and commit, but also the branch. But this information is not populated by default
by the SourceLink package, neither the ReproducibleBuilds (unless this PR is merged).
So just bring the code in that PR here until that's merged and shipped.
SkipLocalsInitAttribute and DisableRuntimeMarshallingAttribute are two attributes I apply to most of my projects by default these days. The latter doesn't currently seem to be generated by PolySharp.
It doesn't work on my environment with VS 2019 (last version) and .NET 4.8
error : The PolySharp source generators have been disabled on the current configuration, as they need Roslyn 4.3 in order to work. PolySharp requires the source generators to run in order to process shaders, so the library cannot be used without a more up to date IDE (eg. VS 2022 17.3 or greater) or .NET SDK version (.NET 6.0.400 SDK or greater).
========== Build: 0 succeeded, 1 failed ==========
If I use VS2022 and .NET 7 I can use all features without this package, so what the sense of using this package if it doesn't work for lower .NET/VS?
Is there any documentation here (or elsewhere) on which C# language features depend on runtime support, and therefore can never be polyfilled?
I know the readme mentions static abstract members, and I'm pretty sure default interface methods are out too.
It would be helpful to have some list of the features that we should not expect this project to ever be able to polyfill, (if only to preempt people opening feature requests for them 😆).
Basically, I just started using PolySharp on a project and find it amazing. Now that project repository is setup to build on Ubuntu runners on github actions and I am getting this error:
/home/runner/.nuget/packages/polysharp/1.14.1/buildTransitive/PolySharp.targets(45,5): error POLYSPCFG0001: The PolySharp source generators have been disabled on the current configuration, as they need Roslyn 4.3 in order to work. PolySharp requires the source generators to run in order to generate polyfills, so the library cannot be used without a more up to date IDE (eg. VS 2022 17.3 or greater) or .NET SDK version (.NET 6.0.400 SDK or greater). [/home/runner/work/some-module/some-module/Module.csproj]
The build process uses .Net 7 but the actual built project is .Net Framework.
Is there thing I could try to fix that or is this scenario just not a supported one ?
In our solution of about 200 projects, all targeting .NET 4.7.2 and using SDK Style format, one project does not have any polyfills generated, see the screenshot. I have no idea why it's not working for this one specific project.
It should generate polyfills in all projects.
Is there a way how can I debug this package or polyfill? Is there any logging that I can read or exception that is thrown?
Polysharp 1.13.2, VS 2022 17.6.2, project targeting .NET 4.7.2 in SDK style.
(Have you tested Polysharp in .NET 4.7.2 SDK style projects?)
Note in each of our projects I can see this error/warning in the Analyzers section: POLYSP0003 Unsupported C# version, even though it works in all but one project. Possibly false positive?
The XML documentation of the generated types - at least the types which are directly used by developers - should match the documentation which is available on learn.microsoft.com and in the IDE when the "native" types are used.
I haven't checked all types, but I've found differences in:
I recently saw this package and decided to try.
Config:
<PackageReference Include="PolySharp" Version="1.10.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>Output:
If I change reference to
<PackageReference Include="PolySharp" Version="1.10.0" Condition="'$(TargetFramework)' != 'net5' AND '$(TargetFramework)' != 'net6' AND '$(TargetFramework)' != 'net7'">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>then there are no errors.
I would like PolySharp does not require Conditional attribute on TFMs where all necessary attributes are present.
In the README (or another document) it would be good if we had a matrix/table/checklist of all of the features added with each language version (post 7) indicating whether it is supported out-of-the-box, supported with polysharp, not supported (yet), and not supported (and can't be supported).
It would be a useful reference so people know exactly what features do and don't work. Yes, there's a list of the available polyfills but that doesn't actually tell us what features work when we add polysharp to our project, it tells us what extra features will work.
Documentation
In the Readme is states
"Note: use on .NET Framework 3.5 is particularly limited due to shortcomings of the BCL there. In particular, the System.Range type will not be generated unless System.ValueTuple is referenced"
I tried referencing System.ValueTuple but it doesn't seem to support .NET 3.5 accoring to https://www.nuget.org/packages/System.ValueTuple.
Before I was using the ValueTupleBridge nuget package, should I still use this.
In general is there some reason why PolySharp can't generate the System.ValueTuple types for 3.5?
Sad that I still have to support some .Net 3.5 stuff.
This exception is not really intended to be caught as it being thrown indicates that something has gone horribly wrong, like a Debug.Assert() failing or Environment.FailFast() being called.
I have several code paths in some of my analyzer and source generator projects where throwing UnreachableException is the obvious thing to do, but the type is net7.0 only.
Can not compile the next code for .NET Standard 1.0 without InAttribute.
public static class Foo
{
public static ref readonly object GetPinnableReference(this object bar) => throw new();
}Successful compilation.
Next compiler error
Error CS0518 Predefined type 'System.Runtime.InteropServices.InAttribute' is not defined or imported (netstandard1.0)
Some older frameworks do not have Array.Empty, which causes a compilation failure when including StringSyntaxAttribute.
Target < NET Standard 1.3 or < NET Framework 4.6.
Compilation succeeds.
The compilation fails with an error => error CS0117: 'Array' does not contain a definition for 'Empty'
This section should contain useful info such as:
This can be worked around by excluding that generation, but it would be expected to build out of the box.
Similar to RequiresUnreferencedCode/DynamicCode there's also RequiresAssemblyFiles.
Hello,
I have tried to use your package, but when I use 11.0 as a parameter in .csproj and I don't have .NET 7 installed, it says: error CS1617: Invalid option '11.0' for /langversion. Use '/langversion:?' to list supported values.
When I install .NET 7, everything works fine. In my .csproj I am using net6.0 in all cases.
Is there a workaround?
Thank you.
Source generators might not be loaded correctly in legacy-style .csproj projects on NETFX (see #39, #43). The readme should include a warning explaining this, with a link to the SDK-style .csproj project docs to help users understand how to fix things.
Support Range for non ValueTuple by remove the GetOffsetAndLength method
Code like "Hello World"[..5] does not need to use Range. It just be compiled to "Hello World".Substring(0, 5). So please remove GetOffsetAndLength when ValueTuple is not referenced like this Range.cs.
there is a struct type named DateOnly in net7.0 under System namespace.
while i installed polysharp in net48 project , it still appears: type 'DateOnly' could not be found
my project is a sdk project and other features are OK.
Like the other runtime-supported attributes, this would do nothing downlevel.
First off, awesome idea for the project. I was hoping someone would do it :)
I was wondering if you had any plans to polyfill certain built-in instance methods with extensions.
For example, these are some of the polyfills I have in my projects:
They allow me to seamlessly call methods only available on newer frameworks, while polyfilling the functionality on older frameworks.
Besides attributes, this could be an additional aspect of polyfilling that might be worth exploring. As a user, I can see great benefit in this as it would allow me to replace my own polyfills that I copy around between projects with a single package.
I propose a similar approach that I've been using: extensions in a global namespace. This makes the polyfill callsites fully source-compatible with natural callsites.
This would require to figure out how to actually implement certain polyfills using existing functionality, and might not be trivial in some cases.
Just writing polyfills manually.
None.
PolySharp's NuGet PackageReference recommendation is currently:
<PackageReference Include="PolySharp" Version="1.7.1" />Since PolySharp is a source-only polyfill provider, it should recommend a more restricted scope PackageReference like this:
<PackageReference Include="PolySharp" Version="1.7.1">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>This prevents any package dependencies from flowing to parent projects as described at Controlling dependency assets. It's also the recommendation of every other source-only polyfill project I'm familiar with (e.g., PolyKit.Embedded, Polyfill.NET, and Nullable).
None that I'm aware of.
I have several NetFramework 4.6.2 projects in a solution and when compiling them, I noticed build issues when using the new range syntax for strings. I replaced the usages of range with SubString calls and compiled the solution then opened the compiled assembly and noticed that the System.Range has not been included.
Maybe I'm doing something wrong? but, I wasn't able to find anything about this in the docs.
The assembly should contain System.Range and the range syntax should work.
If range syntax is used the build will fail. If range syntax is not used, build is successful, but the System.Range won't be included.
This section should contain useful info such as:
I did not notice any messages from Polysharp in the build log, even when building with detailed logging.
VS Code and Rider both recognize the language version, but as soon as I try and compile stuff I get this:
I created a very simple reproduction repo:
https://github.com/YoeriVD/PolySharpTrial
Any help in what I am missing would be greatly appreciated!
AsyncMethodBuilderAttribute and ModuleInitializerAttribute are declared as public rather than internal unlike all the other types produced by the source generator, which causes conflicts when PolySharp is used in a library that is referenced by a project which already uses those types.
[ModuleInitializer] in ProjectBThe projects should compile and ModuleInitializerAttribute be resolved from System.Runtime in ProjectB.
There is a CS0433 error in ProjectB because ModuleInitializerAttribute is declared publicly in both ProjectA and System.Runtime.
Thanks for making this, it's neat having all the polyfills in one place and generated as-required via a source generator 🙂.
I'm trying to annotate https://github.com/peteroupc/CBOR .
I gather the way to do this is to use PolySharp to get access to DynamicallyAccessedMembers , and install this and set langversion to 11.0. But I did this and it doesn't work. Am I doing this wrong?
Attempt is in: https://github.com/charlesroddie/CBOR/pull/1/files
Build error:
CBOR\PeterO\Cbor\PropertyMap.cs(548,6,548,32): error CS0246: The type or namespace name 'DynamicallyAccessedMembersAttribute' could not be found (are you missing a using directive or an assembly reference?)
CBOR\PeterO\Cbor\PropertyMap.cs(548,6,548,32): error CS0246: The type or namespace name 'DynamicallyAccessedMembers' could not be found (are you missing a using directive or an assembly reference?)
Looking inside src/PolySharp.SourceGenerators/EmbeddedResources all polyfill source files are marked as // <auto-generated/> but I could not figure out how exactly those files are generated. I was expecting to find a tool inside this repository that was responsible for automatically generating those files, but could not find one! I even tried looking at the commit history to find clues but it did not help.
@Sergio0694 Could you please shed some light?
Some context: I wanted to contribute a polyfill for UnreachableException (issue #60) and I had to copy/paste the code from https://github.com/dotnet/runtime/blob/main/src/libraries/System.Private.CoreLib/src/System/Diagnostics/UnreachableException.cs It felt very much cheating to not use automatic code generation like all other polyfills.
Can this project add support for RequiresDynamicCodeAttribute?
This is a .NET 7-only sibling to RequiresUnreferencedCode, DynamicDependency, and DynamicallyAccessedMembersAttribute. It is needed for proper annotation of 3rd party libraries that include NativeAOT support.
The generated classes are in System namespace and show up on code coverage reports. Maybe add the ExcludeFromCodeCoverage attribute to them so they do not skew the code coverage numbers.
Is it possible to build PolySharp-enabled project using only Visual Studio Build Tools?. I'm on 17.5.4, yet it complains:
packages\PolySharp.1.13.1\build\PolySharp.targets(45,5): Error : The PolySharp source generators have been disabled on the current configuration, as they need Roslyn 4.3 in order to work. PolySharp requires the source generators to run in order to process shaders, so the library cannot be used without a more up to date IDE (eg. VS 2022 17.3 or greater) or .NET SDK version (.NET 6.0.400 SDK or greater).
I suspect it won't work without full IDE? Using Visual Studio Installer, I cannot find component "C# and Visual Basic Roslyn compilers" (Microsoft.VisualStudio.Component.Roslyn.LanguageServices). Can .NET6/7 somehow be used for language services when targeting .NET Framework? Or is it just for targeting older .NET Core versions? I have installed .NET6/7 on the host too, but the error is still there.
Perhaps if Build Tools are not supported, should be documented as it would help to decide to use PolySharp or no. it happens that my devops agent uses build tools and not the full IDE.
Add a polyfill for the System.Collections.Generic.PriorityQueue<TElement, TPriority> added in .NET 6.0.
Polyfilling System.Collections.Generic.PriorityQueue<TElement, TPriority> helps developers using the same priority queue API in older tfms without the need for preprocessor directives.
According to the .NET 7.0 implementation.
Another polyfill to maintain.
Not supporting System.Collections.Generic.PriorityQueue<TElement, TPriority>
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