public static MethodDeclarationSyntax WithParameters(this MethodDeclarationSyntax method, IEnumerable <string> args = null)
{
ParameterListSyntax parameters = SyntaxFactory.ParameterList();
if (args?.Any() ?? false)
{
parameters = SyntaxFactory.ParameterList(SyntaxFactory.SeparatedList(args.Select(arg => SyntaxFactory.Parameter(SyntaxFactory.Identifier(arg))
.WithType(Types.Type(typeof(int))))));
}
parameters.WithOpenParenToken(SyntaxFactory.Token(SyntaxKind.OpenParenToken))
.WithCloseParenToken(SyntaxFactory.Token(SyntaxKind.CloseParenToken));
return(method.WithParameterList(parameters));
}
// indent is set by the containing VisitMethodDeclaration or VisitBlock+VisitParenthesizedLambda
public override SyntaxNode VisitParameterList(ParameterListSyntax node)
{
var separatedSyntaxList = node.Parameters;
if (!LineSpanNeedsWrapping(node, separatedSyntaxList))
{
return(base.VisitParameterList(node));
}
node = node
.WithOpenParenToken(SyntaxFactory.Token(SyntaxKind.OpenParenToken).WithTrailingTrivia(SyntaxFactory.TriviaList(SyntaxFactory.LineFeed)))
.WithParameters(FormatList(separatedSyntaxList));
var visited = base.VisitParameterList(node);
return(visited);
}
private static ParameterListSyntax NormalizeParameterList(ParameterListSyntax node)
{
int count = node.Parameters.Count;
SyntaxTriviaList[] argumentTriviasLeading = new SyntaxTriviaList[count];
SyntaxTriviaList[] argumentTriviasTrailing = new SyntaxTriviaList[count];
for (int j = 0; j < count; j++)
{
argumentTriviasLeading[j] = SyntaxTriviaList.Empty;
argumentTriviasTrailing[j] = SyntaxTriviaList.Empty;
}
if (count > 0)
{
// save trivia after open paren
SyntaxTriviaList trailing = SyntaxTriviaList.Empty.AddRange(node.OpenParenToken.TrailingTrivia.Where(MultiLineCommentPredicate));
argumentTriviasLeading[0] = argumentTriviasLeading[0].AddRange(trailing);
}
for (int j = 0; j < count - 1; j++)
{
// save trivia on trailing edge of separator to next argument
SyntaxTriviaList trailing = SyntaxTriviaList.Empty.AddRange(node.Parameters.GetSeparator(j).TrailingTrivia.Where(MultiLineCommentPredicate));
argumentTriviasLeading[j + 1] = argumentTriviasLeading[j + 1].AddRange(trailing);
}
for (int j = 0; j < count; j++)
{
// save leading and trailing trivia from argument
SyntaxTriviaList leading = node.Parameters[j].GetLeadingTrivia();
SyntaxTriviaList trailing = node.Parameters[j].GetTrailingTrivia();
argumentTriviasLeading[j] = argumentTriviasLeading[j].AddRange(leading);
argumentTriviasTrailing[j] = argumentTriviasTrailing[j].AddRange(trailing);
}
for (int j = 0; j < count - 1; j++)
{
// save trivia on leading edge of separator to previous argument
SyntaxTriviaList leading = SyntaxTriviaList.Empty.AddRange(node.Parameters.GetSeparator(j).LeadingTrivia.Where(MultiLineCommentPredicate));
argumentTriviasTrailing[j] = argumentTriviasTrailing[j].AddRange(leading);
}
if (count > 0)
{
// save trivia before close paren
SyntaxTriviaList leading = node.CloseParenToken.LeadingTrivia;
argumentTriviasTrailing[count - 1] = argumentTriviasTrailing[count - 1].AddRange(leading);
}
bool multiline;
int indent;
DetectMultiLineArgumentList(node.Parameters, out multiline, out indent);
// strip all trivia
node = node.WithOpenParenToken(node.OpenParenToken.WithTrailingTrivia(SyntaxTriviaList.Empty));
node = node.WithCloseParenToken(node.CloseParenToken.WithLeadingTrivia(SyntaxTriviaList.Empty));
for (int j = 0; j < count - 1; j++)
{
node = node.WithParameters(
node.Parameters.ReplaceSeparator(
node.Parameters.GetSeparator(j),
node.Parameters.GetSeparator(j).WithLeadingTrivia(SyntaxTriviaList.Empty).WithTrailingTrivia(SyntaxTriviaList.Empty)));
}
// reformat
SyntaxTriviaList delimiterTrailing = CreateDelimiterTrailer(multiline, indent);
if (multiline)
{
node = node.WithOpenParenToken(node.OpenParenToken.WithTrailingTrivia(delimiterTrailing));
}
for (int j = 0; j < count - 1; j++)
{
node = node.WithParameters(
node.Parameters.ReplaceSeparator(
node.Parameters.GetSeparator(j),
node.Parameters.GetSeparator(j).WithTrailingTrivia(delimiterTrailing)));
}
// reassociate comment trivia to arguments
for (int j = 0; j < count; j++)
{
node = node.WithParameters(
node.Parameters.Replace(
node.Parameters[j],
node.Parameters[j]
.WithoutTrivia()
.WithLeadingTrivia(argumentTriviasLeading[j])
.WithTrailingTrivia(argumentTriviasTrailing[j])));
}
return(node);
}