private static void ChangeType(
CodeRefactoringContext context,
SemanticModel semanticModel,
VariableDeclarationSyntax variableDeclaration)
{
TypeAnalysisResult result = VariableDeclarationAnalysis.AnalyzeType(
variableDeclaration,
semanticModel,
context.CancellationToken);
switch (result)
{
case TypeAnalysisResult.Explicit:
case TypeAnalysisResult.ExplicitButShouldBeImplicit:
{
context.RegisterRefactoring(
"Change type to 'var'",
cancellationToken => TypeSyntaxRefactoring.ChangeTypeToImplicitAsync(context.Document, variableDeclaration.Type, cancellationToken));
break;
}
case TypeAnalysisResult.Implicit:
case TypeAnalysisResult.ImplicitButShouldBeExplicit:
{
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(variableDeclaration.Type, context.CancellationToken).Type;
context.RegisterRefactoring(
$"Change type to '{typeSymbol.ToDisplayString(TypeSyntaxRefactoring.SymbolDisplayFormat)}'",
cancellationToken => TypeSyntaxRefactoring.ChangeTypeToExplicitAsync(context.Document, variableDeclaration.Type, typeSymbol, cancellationToken));
break;
}
}
}
private void AnalyzeVariableDeclaration(SyntaxNodeAnalysisContext context)
{
if (GeneratedCodeAnalyzer?.IsGeneratedCode(context) == true)
{
return;
}
var variableDeclaration = (VariableDeclarationSyntax)context.Node;
if (variableDeclaration.Variables.Count != 1)
{
return;
}
TypeAnalysisResult result = VariableDeclarationAnalysis.AnalyzeType(
variableDeclaration,
context.SemanticModel,
context.CancellationToken);
switch (result)
{
case TypeAnalysisResult.Explicit:
{
break;
}
case TypeAnalysisResult.ExplicitButShouldBeImplicit:
{
context.ReportDiagnostic(
DiagnosticDescriptors.DeclareImplicitType,
variableDeclaration.Type.GetLocation());
break;
}
case TypeAnalysisResult.Implicit:
{
context.ReportDiagnostic(
DiagnosticDescriptors.DeclareExplicitTypeEvenIfObvious,
variableDeclaration.Type.GetLocation());
break;
}
case TypeAnalysisResult.ImplicitButShouldBeExplicit:
{
context.ReportDiagnostic(
DiagnosticDescriptors.DeclareExplicitType,
variableDeclaration.Type.GetLocation());
break;
}
}
}
private static async Task ChangeTypeAsync(
RefactoringContext context,
VariableDeclarationSyntax variableDeclaration)
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
TypeAnalysisResult result = VariableDeclarationAnalysis.AnalyzeType(
variableDeclaration,
semanticModel,
context.CancellationToken);
if (result == TypeAnalysisResult.Explicit || result == TypeAnalysisResult.ExplicitButShouldBeImplicit)
{
if (context.IsRefactoringEnabled(RefactoringIdentifiers.ChangeExplicitTypeToVar))
{
context.RegisterRefactoring(
"Change type to 'var'",
cancellationToken =>
{
return(ChangeTypeRefactoring.ChangeTypeToVarAsync(
context.Document,
variableDeclaration.Type,
cancellationToken));
});
}
}
else if (result == TypeAnalysisResult.Implicit || result == TypeAnalysisResult.ImplicitButShouldBeExplicit)
{
if (context.IsRefactoringEnabled(RefactoringIdentifiers.ChangeVarToExplicitType))
{
ITypeSymbol typeSymbol = semanticModel
.GetTypeInfo(variableDeclaration.Type, context.CancellationToken)
.Type;
ChangeType(context, variableDeclaration, typeSymbol, semanticModel, context.CancellationToken);
}
}
}