public static void ComputeRefactorings(RefactoringContext context, UsingStatementSyntax usingStatement)
{
if (context.IsRefactoringEnabled(RefactoringIdentifiers.IntroduceLocalVariable))
{
ExpressionSyntax expression = usingStatement.Expression;
if (expression != null)
{
context.RegisterRefactoring(
IntroduceLocalVariableRefactoring.GetTitle(expression),
cancellationToken => IntroduceLocalVariableRefactoring.RefactorAsync(context.Document, usingStatement, expression, cancellationToken));
}
}
}
public static async Task ComputeRefactoringsAsync(RefactoringContext context, ExpressionStatementSyntax expressionStatement)
{
if (context.IsRefactoringEnabled(RefactoringIdentifiers.AddIdentifierToVariableDeclaration))
{
await AddIdentifierToLocalDeclarationRefactoring.ComputeRefactoringAsync(context, expressionStatement).ConfigureAwait(false);
}
if (context.IsRefactoringEnabled(RefactoringIdentifiers.IntroduceLocalVariable))
{
ExpressionSyntax expression = expressionStatement.Expression;
if (expression?.IsMissing == false &&
context.Span.IsEmptyAndContainedInSpanOrBetweenSpans(expression) &&
!expressionStatement.IsEmbedded() &&
!(expression is AssignmentExpressionSyntax) &&
!CSharpFacts.IsIncrementOrDecrementExpression(expression.Kind()))
{
SemanticModel semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
if (semanticModel.GetSymbol(expression, context.CancellationToken)?.IsErrorType() == false)
{
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(expression, context.CancellationToken);
if (typeSymbol?.IsErrorType() == false &&
!typeSymbol.HasMetadataName(MetadataNames.System_Threading_Tasks_Task) &&
!typeSymbol.IsVoid())
{
bool addAwait = false;
if (typeSymbol.OriginalDefinition.EqualsOrInheritsFromTaskOfT())
{
ISymbol enclosingSymbol = semanticModel.GetEnclosingSymbol(expressionStatement.SpanStart, context.CancellationToken);
addAwait = enclosingSymbol.IsAsyncMethod();
}
context.RegisterRefactoring(
IntroduceLocalVariableRefactoring.GetTitle(expression),
cancellationToken => IntroduceLocalVariableRefactoring.RefactorAsync(context.Document, expressionStatement, typeSymbol, addAwait, semanticModel, cancellationToken),
RefactoringIdentifiers.IntroduceLocalVariable);
}
}
}
}
}