public override async Task ComputeRefactoringsAsync(CodeRefactoringContext context)
{
var(document, textSpan, cancellationToken) = context;
var syntaxTree = (await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false)) !;
if (!MakeLocalFunctionStaticHelper.IsStaticLocalFunctionSupported(((CSharpParseOptions)syntaxTree.Options).LanguageVersion))
{
return;
}
var localFunction = await context.TryGetRelevantNodeAsync <LocalFunctionStatementSyntax>().ConfigureAwait(false);
if (localFunction == null)
{
return;
}
if (localFunction.Modifiers.Any(SyntaxKind.StaticKeyword))
{
return;
}
var semanticModel = (await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false)) !;
if (MakeLocalFunctionStaticHelper.CanMakeLocalFunctionStaticByRefactoringCaptures(localFunction, semanticModel, out var captures))
{
context.RegisterRefactoring(new MyCodeAction(
c => MakeLocalFunctionStaticCodeFixHelper.MakeLocalFunctionStaticAsync(document, localFunction, captures, c)));
}
}
// The purpose of this wrapper is to share some common logic between FixOne and FixAll.
// The main reason we chose this approach over the typical "FixOne calls FixAll" approach is
// to avoid duplicate code.
private static async Task WrapFixAsync(
Document document,
ImmutableArray <Diagnostic> diagnostics,
Func <Document, LocalFunctionStatementSyntax, ImmutableArray <ISymbol>, Task> fixer,
CancellationToken cancellationToken
)
{
var root = (
await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false)
) !;
// Even when the language version doesn't support staic local function, the compiler will still
// generate this error. So we need to check to make sure we don't provide incorrect fix.
if (!MakeLocalFunctionStaticHelper.IsStaticLocalFunctionSupported(root.SyntaxTree))
{
return;
}
// Find all unique local functions that contain the error.
var localFunctions = diagnostics
.Select(
d =>
root.FindNode(d.Location.SourceSpan)
.AncestorsAndSelf()
.OfType <LocalFunctionStatementSyntax>()
.FirstOrDefault()
)
.WhereNotNull()
.Distinct()
.ToImmutableArrayOrEmpty();
if (localFunctions.Length == 0)
{
return;
}
var semanticModel = (
await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false)
) !;
foreach (var localFunction in localFunctions)
{
if (
MakeLocalFunctionStaticHelper.CanMakeLocalFunctionStaticByRefactoringCaptures(
localFunction,
semanticModel,
out var captures
)
)
{
await fixer(document, localFunction, captures).ConfigureAwait(false);
}
}
}
