public override SyntaxNode VisitTryStatement(TryStatementSyntax node)
{
// Do not add an OperationCanceledException catch block if:
// - there are no catch blocks (only finally)
// - there already exists an OperationCanceledException catch block
// - there are no ancestors of OperationCanceledException being catched
// - there are no async calls that have a cancellation token argument and there are no guards added
if (node.Catches.Count == 0 ||
node.Catches.Any(o => o.Declaration != null && SkipExceptions.Contains(o.Declaration.Type.ToString())) ||
node.Catches.All(o => o.Declaration != null && !IncludeExceptions.Contains(o.Declaration.Type.ToString())) ||
!node.Block.DescendantNodes(o => !o.IsFunction()).Any(o => o.HasAnnotations(Annotations.AsyncCallWithTokenOrGuard)))
{
return(base.VisitTryStatement(node));
}
var catchClause = CatchClause()
.WithCatchKeyword(
Token(TriviaList(node.GetLeadingTrivia().LastOrDefault(o => o.IsKind(SyntaxKind.WhitespaceTrivia))), SyntaxKind.CatchKeyword, TriviaList(Space)))
.WithDeclaration(
CatchDeclaration(_namespaceMetadata.UsingSystem
? IdentifierName(nameof(OperationCanceledException))
: SyntaxNodeExtensions.ConstructNameSyntax($"System.{nameof(OperationCanceledException)}"))
.WithCloseParenToken(Token(TriviaList(), SyntaxKind.CloseParenToken, TriviaList(Space))))
.WithBlock(
Block(SingletonList <StatementSyntax>(
ThrowStatement().WithSemicolonToken(Token(TriviaList(), SyntaxKind.SemicolonToken, TriviaList(Space)))
))
.WithOpenBraceToken(Token(TriviaList(), SyntaxKind.OpenBraceToken, TriviaList(Space)))
.WithCloseBraceToken(Token(TriviaList(), SyntaxKind.CloseBraceToken, TriviaList(_eolTrivia)))
);
node = node.WithCatches(new SyntaxList <CatchClauseSyntax>(new[] { catchClause }.Concat(node.Catches)));
return(base.VisitTryStatement(node));
}
public override SyntaxNode VisitTryStatement(TryStatementSyntax node)
{
if (RemoveTestTriviaAnnotation(node.GetLeadingTrivia()))
{
return(null);
}
return(base.VisitTryStatement(node));
}