public static Task <Document> RemoveRedundantAssignmentAfterLocalDeclarationAsync(
Document document,
VariableDeclaratorSyntax declarator,
CancellationToken cancellationToken = default)
{
var declaration = (VariableDeclarationSyntax)declarator.Parent;
var localDeclaration = (LocalDeclarationStatementSyntax)declaration.Parent;
StatementListInfo statementsInfo = SyntaxInfo.StatementListInfo(localDeclaration);
SyntaxList <StatementSyntax> statements = statementsInfo.Statements;
int index = statements.IndexOf(localDeclaration);
StatementSyntax nextStatement = statements[index + 1];
var expressionStatement = (ExpressionStatementSyntax)nextStatement;
var assignment = (AssignmentExpressionSyntax)expressionStatement.Expression;
ExpressionSyntax right = assignment.Right;
EqualsValueClauseSyntax initializer = declarator.Initializer;
ExpressionSyntax value = initializer?.Value;
VariableDeclaratorSyntax newDeclarator = (value != null)
? declarator.ReplaceNode(value, right)
: declarator.WithInitializer(EqualsValueClause(right));
LocalDeclarationStatementSyntax newLocalDeclaration = localDeclaration.ReplaceNode(declarator, newDeclarator);
SyntaxTriviaList trailingTrivia = localDeclaration.GetTrailingTrivia();
if (!trailingTrivia.IsEmptyOrWhitespace())
{
newLocalDeclaration = newLocalDeclaration.WithTrailingTrivia(trailingTrivia.Concat(nextStatement.GetTrailingTrivia()));
}
else
{
newLocalDeclaration = newLocalDeclaration.WithTrailingTrivia(nextStatement.GetTrailingTrivia());
}
SyntaxTriviaList leadingTrivia = nextStatement.GetLeadingTrivia();
if (!leadingTrivia.IsEmptyOrWhitespace())
{
newLocalDeclaration = newLocalDeclaration.WithLeadingTrivia(newLocalDeclaration.GetLeadingTrivia().Concat(leadingTrivia));
}
SyntaxList <StatementSyntax> newStatements = statements
.Replace(localDeclaration, newLocalDeclaration)
.RemoveAt(index + 1);
return(document.ReplaceStatementsAsync(statementsInfo, newStatements, cancellationToken));
}
public static Task <Document> RefactorAsync(
Document document,
VariableDeclaratorSyntax declarator,
CancellationToken cancellationToken)
{
var declaration = (VariableDeclarationSyntax)declarator.Parent;
var localDeclaration = (LocalDeclarationStatementSyntax)declaration.Parent;
StatementContainer container = StatementContainer.Create(localDeclaration);
SyntaxList <StatementSyntax> statements = container.Statements;
int index = statements.IndexOf(localDeclaration);
StatementSyntax nextStatement = statements[index + 1];
var expressionStatement = (ExpressionStatementSyntax)nextStatement;
var assignment = (AssignmentExpressionSyntax)expressionStatement.Expression;
ExpressionSyntax right = assignment.Right;
EqualsValueClauseSyntax initializer = declarator.Initializer;
ExpressionSyntax value = initializer?.Value;
VariableDeclaratorSyntax newDeclarator = (value != null)
? declarator.ReplaceNode(value, right)
: declarator.WithInitializer(EqualsValueClause(right));
LocalDeclarationStatementSyntax newLocalDeclaration = localDeclaration.ReplaceNode(declarator, newDeclarator);
SyntaxTriviaList trailingTrivia = localDeclaration.GetTrailingTrivia();
if (trailingTrivia.Any(f => !f.IsWhitespaceOrEndOfLineTrivia()))
{
newLocalDeclaration = newLocalDeclaration.WithTrailingTrivia(trailingTrivia.Concat(nextStatement.GetTrailingTrivia()));
}
else
{
newLocalDeclaration = newLocalDeclaration.WithTrailingTrivia(nextStatement.GetTrailingTrivia());
}
SyntaxTriviaList leadingTrivia = nextStatement.GetLeadingTrivia();
if (leadingTrivia.Any(f => !f.IsWhitespaceOrEndOfLineTrivia()))
{
newLocalDeclaration = newLocalDeclaration.WithLeadingTrivia(newLocalDeclaration.GetLeadingTrivia().Concat(leadingTrivia));
}
SyntaxList <StatementSyntax> newStatements = statements
.Replace(localDeclaration, newLocalDeclaration)
.RemoveAt(index + 1);
return(document.ReplaceNodeAsync(container.Node, container.NodeWithStatements(newStatements), cancellationToken));
}
private FieldVariableTransformationResult TransformFieldVariable(
VariableDeclaratorSyntax variableNode,
FieldVariableTransformationResult result,
bool canCopy)
{
var variableResult = result.AnalyzationResult;
var conversion = variableResult.Conversion;
if (conversion == FieldVariableConversion.Ignore || !canCopy)
{
return(result);
}
var startVariableSpan = variableResult.Node.Span.Start;
variableNode = variableNode.WithAdditionalAnnotations(new SyntaxAnnotation(result.Annotation));
startVariableSpan -= variableNode.SpanStart;
// First we need to annotate nodes that will be modified in order to find them later on.
// We cannot rely on spans after the first modification as they will change
var typeReferencesAnnotations = new List <string>();
foreach (var typeReference in variableResult.TypeReferences.Where(o => o.TypeAnalyzationResult.Conversion == TypeConversion.NewType))
{
var reference = typeReference.ReferenceLocation;
var refSpanStart = reference.Location.SourceSpan.Start - startVariableSpan;
var nameNode = variableNode.GetSimpleName(refSpanStart, reference.Location.SourceSpan.Length, typeReference.IsCref);
var annotation = Guid.NewGuid().ToString();
variableNode = variableNode.ReplaceNode(nameNode, nameNode.WithAdditionalAnnotations(new SyntaxAnnotation(annotation)));
typeReferencesAnnotations.Add(annotation);
}
// Modify references
foreach (var refAnnotation in typeReferencesAnnotations)
{
var nameNode = variableNode.GetAnnotatedNodes(refAnnotation).OfType <SimpleNameSyntax>().First();
variableNode = variableNode
.ReplaceNode(nameNode, nameNode.WithIdentifier(Identifier(nameNode.Identifier.Value + "Async").WithTriviaFrom(nameNode.Identifier)));
}
result.Transformed = variableNode;
return(result);
}
public override SyntaxNode VisitVariableDeclarator(VariableDeclaratorSyntax node)
{
String name = node.Identifier.ValueText;
String replaceName = "";
if (SharedContainer.Instance.nameMap.ContainsKey(name))
{
replaceName = SharedContainer.Instance.nameMap[name];
}
else
{
replaceName = SharedContainer.Instance.RandomString(SharedContainer.Instance.nameMap.Count() + 1);
SharedContainer.Instance.nameMap[name] = replaceName;
}
VariableDeclaratorSyntax newSyntax = node.WithIdentifier(Identifier(replaceName)).WithLeadingTrivia(node.GetLeadingTrivia()).WithTrailingTrivia(node.GetTrailingTrivia());
return(node.ReplaceNode(node, newSyntax));
}
public static async Task <Document> RefactorAsync(
Document document,
VariableDeclaratorSyntax declarator,
CancellationToken cancellationToken)
{
var declaration = (VariableDeclarationSyntax)declarator.Parent;
var localDeclaration = (LocalDeclarationStatementSyntax)declaration.Parent;
StatementContainer container;
if (StatementContainer.TryCreate(localDeclaration, out container))
{
SyntaxList <StatementSyntax> statements = container.Statements;
int index = statements.IndexOf(localDeclaration);
StatementSyntax nextStatement = statements[index + 1];
var expressionStatement = (ExpressionStatementSyntax)nextStatement;
var assignment = (AssignmentExpressionSyntax)expressionStatement.Expression;
ExpressionSyntax right = assignment.Right;
EqualsValueClauseSyntax initializer = declarator.Initializer;
ExpressionSyntax value = initializer?.Value;
VariableDeclaratorSyntax newDeclarator = (value != null)
? declarator.ReplaceNode(value, right)
: declarator.WithInitializer(EqualsValueClause(right));
LocalDeclarationStatementSyntax newLocalDeclaration = localDeclaration.ReplaceNode(declarator, newDeclarator);
SyntaxTriviaList trailingTrivia = nextStatement.GetTrailingTrivia();
IEnumerable <SyntaxTrivia> trivia = container
.Node
.DescendantTrivia(TextSpan.FromBounds(localDeclaration.Span.End, right.SpanStart));
if (!trivia.All(f => f.IsWhitespaceOrEndOfLineTrivia()))
{
newLocalDeclaration = newLocalDeclaration.WithTrailingTrivia(trivia.Concat(trailingTrivia));
}
else
{
newLocalDeclaration = newLocalDeclaration.WithTrailingTrivia(trailingTrivia);
}
SyntaxList <StatementSyntax> newStatements = statements
.Replace(localDeclaration, newLocalDeclaration)
.RemoveAt(index + 1);
return(await document.ReplaceNodeAsync(container.Node, container.NodeWithStatements(newStatements), cancellationToken).ConfigureAwait(false));
}
Debug.Assert(false, "");
return(document);
}