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 static void ChangeTypeAccordingToExpression(
CodeRefactoringContext context,
SemanticModel semanticModel,
VariableDeclarationSyntax variableDeclaration)
{
if (variableDeclaration.Parent?.IsKind(SyntaxKind.FieldDeclaration) != false)
{
return;
}
TypeSyntax type = variableDeclaration.Type;
if (type == null)
{
return;
}
if (type.IsVar)
{
return;
}
if (!type.Span.Contains(context.Span))
{
return;
}
if (variableDeclaration.Variables.Count != 1)
{
return;
}
EqualsValueClauseSyntax initializer = variableDeclaration.Variables[0].Initializer;
if (initializer == null)
{
return;
}
if (initializer.Value == null)
{
return;
}
ITypeSymbol initializerTypeSymbol = semanticModel.GetTypeInfo(initializer.Value).Type;
if (initializerTypeSymbol == null || initializerTypeSymbol.IsKind(SymbolKind.ErrorType))
{
return;
}
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(type).ConvertedType;
if (!initializerTypeSymbol.Equals(typeSymbol))
{
context.RegisterRefactoring(
$"Change type to '{initializerTypeSymbol.ToDisplayString(TypeSyntaxRefactoring.SymbolDisplayFormat)}'",
cancellationToken => TypeSyntaxRefactoring.ChangeTypeToExplicitAsync(context.Document, variableDeclaration.Type, initializerTypeSymbol, cancellationToken));
}
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
SyntaxNode root = await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
VariableDeclarationSyntax variableDeclaration = root
.FindNode(context.Span, getInnermostNodeForTie: true)?
.FirstAncestorOrSelf <VariableDeclarationSyntax>();
if (variableDeclaration == null)
{
return;
}
if (variableDeclaration.Type.IsVar)
{
SemanticModel semanticModel = await context.Document.GetSemanticModelAsync(context.CancellationToken);
if (semanticModel == null)
{
return;
}
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(variableDeclaration.Type).Type;
CodeAction codeAction = CodeAction.Create(
$"Change type to '{typeSymbol.ToDisplayString(TypeSyntaxRefactoring.SymbolDisplayFormat)}'",
cancellationToken => TypeSyntaxRefactoring.ChangeTypeToExplicitAsync(context.Document, variableDeclaration.Type, typeSymbol, cancellationToken),
DiagnosticIdentifiers.DeclareExplicitType + EquivalenceKeySuffix);
context.RegisterCodeFix(codeAction, context.Diagnostics);
}
}
private static void ChangeTypeAccordingToExpression(
CodeRefactoringContext context,
SemanticModel semanticModel,
ForEachStatementSyntax forEachStatement)
{
if (forEachStatement.Type?.IsVar != false)
{
return;
}
if (!forEachStatement.Type.Span.Contains(context.Span))
{
return;
}
ForEachStatementInfo forEachInfo = semanticModel.GetForEachStatementInfo(forEachStatement);
ITypeSymbol typeSymbol = semanticModel.GetTypeInfo(forEachStatement.Type).ConvertedType;
if (forEachInfo.ElementType?.Equals(typeSymbol) != false)
{
return;
}
context.RegisterRefactoring(
$"Change type to '{forEachInfo.ElementType.ToDisplayString(TypeSyntaxRefactoring.SymbolDisplayFormat)}'",
cancellationToken => TypeSyntaxRefactoring.ChangeTypeToExplicitAsync(context.Document, forEachStatement.Type, forEachInfo.ElementType, cancellationToken));
}
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;
}
}
}