private static ExpressionSyntax SimplifyCast(CastExpressionSyntax node, SemanticModel semanticModel, OptionSet optionSet, CancellationToken cancellationToken)
{
if (!node.IsUnnecessaryCast(semanticModel, cancellationToken))
{
return node;
}
var leadingTrivia = node.OpenParenToken.LeadingTrivia
.Concat(node.OpenParenToken.TrailingTrivia)
.Concat(node.Type.GetLeadingTrivia())
.Concat(node.Type.GetTrailingTrivia())
.Concat(node.CloseParenToken.LeadingTrivia)
.Concat(node.CloseParenToken.TrailingTrivia)
.Concat(node.Expression.GetLeadingTrivia())
.Where(t => !t.IsElastic());
var trailingTrivia = node.GetTrailingTrivia().Where(t => !t.IsElastic());
var resultNode = node.Expression
.WithLeadingTrivia(leadingTrivia)
.WithTrailingTrivia(trailingTrivia);
resultNode = SimplificationHelpers.CopyAnnotations(from: node, to: resultNode);
return resultNode;
}
private static ExpressionSyntax SimplifyCast(CastExpressionSyntax node, SemanticModel semanticModel, OptionSet optionSet, CancellationToken cancellationToken)
{
if (!node.IsUnnecessaryCast(semanticModel, cancellationToken))
{
return(node);
}
var leadingTrivia = node.OpenParenToken.LeadingTrivia
.Concat(node.OpenParenToken.TrailingTrivia)
.Concat(node.Type.GetLeadingTrivia())
.Concat(node.Type.GetTrailingTrivia())
.Concat(node.CloseParenToken.LeadingTrivia)
.Concat(node.CloseParenToken.TrailingTrivia)
.Concat(node.Expression.GetLeadingTrivia())
.Where(t => !t.IsElastic());
var trailingTrivia = node.GetTrailingTrivia().Where(t => !t.IsElastic());
var resultNode = node.Expression
.WithLeadingTrivia(leadingTrivia)
.WithTrailingTrivia(trailingTrivia);
resultNode = SimplificationHelpers.CopyAnnotations(from: node, to: resultNode);
return(resultNode);
}
private static ExpressionSyntax SimplifyCast(CastExpressionSyntax node, SemanticModel semanticModel, OptionSet optionSet, CancellationToken cancellationToken)
{
if (!node.IsUnnecessaryCast(semanticModel, cancellationToken))
{
return(node);
}
return(node.Uncast());
}
private bool TryRemoveCastExpression(
SemanticModel model, CastExpressionSyntax node, out Diagnostic diagnostic, CancellationToken cancellationToken)
{
diagnostic = default(Diagnostic);
if (!node.IsUnnecessaryCast(model, cancellationToken))
{
return(false);
}
var tree = model.SyntaxTree;
var span = TextSpan.FromBounds(node.OpenParenToken.SpanStart, node.CloseParenToken.Span.End);
if (tree.OverlapsHiddenPosition(span, cancellationToken))
{
return(false);
}
diagnostic = Diagnostic.Create(DiagnosticMD, tree.GetLocation(span));
return(true);
}