private void AnalyzeForEachStatement(SyntaxNodeAnalysisContext context)
{
if (GeneratedCodeAnalyzer?.IsGeneratedCode(context) == true)
{
return;
}
var forEachStatement = (ForEachStatementSyntax)context.Node;
TypeAnalysisResult result = ForEachStatementAnalysis.AnalyzeType(forEachStatement, context.SemanticModel, context.CancellationToken);
if (result == TypeAnalysisResult.ImplicitButShouldBeExplicit)
{
context.ReportDiagnostic(
DiagnosticDescriptors.DeclareExplicitTypeInForEach,
forEachStatement.Type.GetLocation());
}
}
private static void ChangeType(
CodeRefactoringContext context,
SemanticModel semanticModel,
ForEachStatementSyntax forEachStatement)
{
TypeSyntax type = forEachStatement.Type;
if (type == null || !type.Span.Contains(context.Span))
{
return;
}
TypeAnalysisResult result = ForEachStatementAnalysis.AnalyzeType(
forEachStatement,
semanticModel,
context.CancellationToken);
switch (result)
{
case TypeAnalysisResult.Explicit:
{
context.RegisterRefactoring(
"Change type to 'var'",
cancellationToken => TypeSyntaxRefactoring.ChangeTypeToImplicitAsync(context.Document, type, cancellationToken));
break;
}
case TypeAnalysisResult.ImplicitButShouldBeExplicit:
{
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(type, context.CancellationToken).Type;
context.RegisterRefactoring(
$"Change type to '{typeSymbol.ToDisplayString(TypeSyntaxRefactoring.SymbolDisplayFormat)}'",
cancellationToken => TypeSyntaxRefactoring.ChangeTypeToExplicitAsync(context.Document, type, typeSymbol, cancellationToken));
break;
}
}
}
internal static async Task ChangeTypeAsync(
RefactoringContext context,
ForEachStatementSyntax forEachStatement)
{
TypeSyntax type = forEachStatement.Type;
if (type?.Span.Contains(context.Span) != true)
{
return;
}
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
TypeAnalysisResult result = ForEachStatementAnalysis.AnalyzeType(
forEachStatement,
semanticModel,
context.CancellationToken);
if (result == TypeAnalysisResult.Explicit)
{
if (context.IsRefactoringEnabled(RefactoringIdentifiers.ChangeExplicitTypeToVar))
{
context.RegisterRefactoring(
"Change type to 'var'",
cancellationToken => ChangeTypeRefactoring.ChangeTypeToVarAsync(context.Document, type, cancellationToken));
}
}
else if (result == TypeAnalysisResult.ImplicitButShouldBeExplicit)
{
if (context.IsRefactoringEnabled(RefactoringIdentifiers.ChangeVarToExplicitType))
{
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(type, context.CancellationToken).Type;
context.RegisterRefactoring(
$"Change type to '{typeSymbol.ToMinimalDisplayString(semanticModel, type.Span.Start, SyntaxUtility.DefaultSymbolDisplayFormat)}'",
cancellationToken => ChangeTypeRefactoring.ChangeTypeAsync(context.Document, type, typeSymbol, cancellationToken));
}
}
}