roslyn: Source Generators: design-time completion/intellisense and Target Framework not work
Version Used:
Steps to Reproduce:
- Setup the project
- Use generated code
- Build
Expected Behavior:
design-time completion/intellisense and My TestProject->Dependencies->Analyzers->Generator not generated,
mostly VS not catch it as i see it’s generated in the path $(ProjectDir)Generated\Generator\Generator.MySourceGenerator\HelloWorldGenerator.cs
And only after restart (not change any setting)
Actual Behavior:
Nothing of Expected Behavior happens 😄 ,
Also if i change my generator generated namespace to HelloWorldGeneratedxxx and rebuild
intellisense will work if restart VS(without change any setting)
Side Problem
As i read here StackOverflow it should my generator work with any Target Framework, but when targeting net5.0 it’s never works even after restart Visual Studio it’s not completion/intellisense problem as project never build
Rebuild started...
1>------ Rebuild All started: Project: Generator, Configuration: Debug Any CPU ------
Restored C:\Users\CorrM\source\repos\SourceGenTest\SourceGenTest\SourceGenTest.csproj (in 5 ms).
Restored C:\Users\CorrM\source\repos\SourceGenTest\Generator\Generator.csproj (in 31 ms).
1>Generator -> C:\Users\CorrM\source\repos\SourceGenTest\Generator\bin\Debug\net5.0\Generator.dll
2>------ Rebuild All started: Project: SourceGenTest, Configuration: Debug Any CPU ------
2>CSC : warning CS8032: An instance of analyzer Generator.MySourceGenerator cannot be created from C:\Users\CorrM\source\repos\SourceGenTest\Generator\bin\Debug\net5.0\Generator.dll : Could not load file or assembly 'System.Runtime, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified..
2>C:\Users\CorrM\source\repos\SourceGenTest\SourceGenTest\Program.cs(9,4,9,23): error CS0103: The name 'HelloWorldGenerated' does not exist in the current context
2>Done building project "SourceGenTest.csproj" -- FAILED.
========== Rebuild All: 1 succeeded, 1 failed, 0 skipped ==========
When targeting netstandard2.0(without change any other setting) it’s working!
Build started...
1>------ Build started: Project: Generator, Configuration: Debug Any CPU ------
1>Generator -> C:\Users\CorrM\source\repos\SourceGenTest\Generator\bin\Debug\netstandard2.0\Generator.dll
2>------ Build started: Project: SourceGenTest, Configuration: Debug Any CPU ------
2>SourceGenTest -> C:\Users\CorrM\source\repos\SourceGenTest\SourceGenTest\bin\Debug\net5.0\SourceGenTest.dll
========== Build: 2 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
Sorry for all this images but i think images is the best to explain that problem
About this issue
- Original URL
- State: closed
- Created 3 years ago
- Comments: 19 (13 by maintainers)
Going through this conversation I think there’s three issues that were raised:
I’m closing this since I don’t think there’s anything else unique in this bug, but if I missed something do raise it!
Any plans on supporting this scenario for Visual Studio?
We have source generators for internal use and put the generator and the unit tests in the same solution.
Restarting VS everytime we want to run the unit tests (after modifying the source generator) is a poor experience.
We are investigating ways to fix this, but we’re not yet certain it’s possible. The .NET Framework assembly loader generally doesn’t like loading multiple versions of the same assembly. It also isn’t possible to unload the assembly after it’s loaded, so each new build will add a new assembly in memory until you eventually restart the IDE.
The flexibility described on Stack Overflow applies only to consumers of source generators (in this case, SourceGenTest.csproj). The source generator itself (Generator.csproj) must target exactly
netstandard2.0.