public override void SetLanguageLevel(IPsiModule psiModule, CSharpLanguageLevel languageLevel)
{
throw new InvalidOperationException("Language level cannot be set for a T4 module.");
}
public override void SetLanguageLevel(IPsiModule psiModule, CSharpLanguageLevel languageLevel) {
throw new InvalidOperationException("Language level cannot be set for a T4 module.");
}
private void InitLanguageLevelSettings(IProject project, SettingsStorageMountPoint mountPoint)
{
if (!project.IsProjectCompiledByUnity())
{
return; // https://github.com/JetBrains/resharper-unity/issues/150
}
// Make sure ReSharper doesn't suggest code changes that won't compile in Unity
// due to mismatched C# language levels (e.g. C#6 "elvis" operator)
//
// * Unity prior to 5.5 uses an old mono compiler that only supports C# 4
// * Unity 5.5 and later adds C# 6 support as an option. This is enabled by setting
// the API compatibility level to NET_4_6
// * The CSharp60Support plugin replaces the compiler with either C# 6 or C# 7.0
// It can be recognised by a folder called `CSharp60Support` or `CSharp70Support`
// in the root of the project
// (https://bitbucket.org/alexzzzz/unity-c-5.0-and-6.0-integration)
//
// Scenarios:
// * No VSTU installed (including Unity 5.5)
// .csproj has NO `LangVersion`. `TargetFrameworkVersion` will be `v3.5`
// * Early versions of VSTU
// .csproj has NO `LangVersion`. `TargetFrameworkVersion` will be `v3.5`
// * Later versions of VSTU
// `LangVersion` is correctly set to "4". `TargetFrameworkVersion` will be `v3.5`
// * VSTU for 5.5
// `LangVersion` is set to "default". `TargetFrameworkVersion` will be `v3.5` or `v4.6`
// Note that "default" for VS"15" or Rider will be C# 7.0!
// * Unity3dRider is installed
// Uses Unity's own generation and adds correct `LangVersion`
// `TargetFrameworkVersion` will be `v3.5` or `v4.6`
// * CSharp60Support is installed
// .csproj has NO `LangVersion`
// `TargetFrameworkVersion` is NOT accurate (support for C# 6 is not dependent on/trigger by .net 4.6)
// Look for `CSharp60Support` or `CSharp70Support` folders
//
// Actions:
// If `LangVersion` is missing or "default"
// then override based on `TargetFrameworkVersion` or presence of `CSharp60Support`/`CSharp70Support`
// else do nothing
//
// Notes:
// * Unity and VSTU have two separate .csproj routines. VSTU adds extra references,
// the VSTU project flavour GUID and imports UnityVs.targets, which disables the
// `GenerateTargetFrameworkMonikerAttribute` target
// * CSharp60Support post-processes the .csproj file directly if VSTU is not installed.
// If it is installed, it registers a delegate with `ProjectFilesGenerator.ProjectFileGeneration`
// and removes it before it's written to disk
// * `LangVersion` can be conditionally specified, which makes checking for "default" awkward
// * If Unity3dRider + CSharp60Support are both installed, last write wins
// Order of post-processing is non-deterministic, so Rider's LangVersion might be removed
// * Unity3dRider can set `TargetFrameworkVersion` to `v4.5` on non-Windows machines to fix
// an issue resolving System.Linq
var languageLevel = CSharpLanguageLevel.Default;
if (IsLangVersionMissing(project) || IsLangVersionDefault(project))
{
const CSharpLanguageLevel csharp70 = CSharpLanguageLevel.Experimental;
// Support for https://bitbucket.org/alexzzzz/unity-c-5.0-and-6.0-integration
// See also https://github.com/JetBrains/resharper-unity/issues/50#issuecomment-257611218
if (project.Location.CombineWithShortName("CSharp70Support").ExistsDirectory)
{
languageLevel = csharp70;
}
else if (project.Location.CombineWithShortName("CSharp60Support").ExistsDirectory)
{
languageLevel = CSharpLanguageLevel.CSharp60;
}
else
{
languageLevel = IsTargetFrameworkAtLeast46(project)
? CSharpLanguageLevel.CSharp60
: CSharpLanguageLevel.CSharp40;
}
}
SetValue(mountPoint, (CSharpLanguageProjectSettings s) => s.LanguageLevel, languageLevel);
}
public override bool CanSetCompilerLanguageLevel(IPsiModule psiModule, CSharpLanguageLevel languageLevel) => false;
