protected override bool IsFixable(StatementSyntax statement, BlockSyntax block, SyntaxKind parentKind)
{
if (!parentKind.Is(
SyntaxKind.MethodDeclaration,
SyntaxKind.LocalFunctionStatement))
{
return false;
}
SyntaxList<StatementSyntax> statements = block.Statements;
if (object.ReferenceEquals(statements.SingleOrDefault(ignoreLocalFunctions: true, shouldThrow: false), statement))
return false;
ContainsYieldWalker walker = ContainsYieldWalker.GetInstance();
bool success = false;
int index = statements.IndexOf(statement);
for (int i = 0; i < index; i++)
{
walker.VisitStatement(statements[i]);
success = walker.YieldStatement != null;
if (success)
break;
}
ContainsYieldWalker.Free(walker);
return success;
}
private static void AnalyzeMethodDeclaration(SyntaxNodeAnalysisContext context)
{
var methodDeclaration = (MethodDeclarationSyntax)context.Node;
BlockSyntax body = methodDeclaration.Body;
if (body == null)
{
return;
}
ParameterListSyntax parameterList = methodDeclaration.ParameterList;
if (parameterList == null)
{
return;
}
if (!parameterList.Parameters.Any())
{
return;
}
SyntaxList <StatementSyntax> statements = body.Statements;
int statementCount = statements.Count;
int index = -1;
for (int i = 0; i < statementCount; i++)
{
if (IsNullCheck(statements[i]))
{
index++;
}
else
{
break;
}
}
if (index == -1)
{
return;
}
if (index == statementCount - 1)
{
return;
}
TextSpan span = TextSpan.FromBounds(statements[index + 1].SpanStart, statements.Last().Span.End);
if (body.ContainsUnbalancedIfElseDirectives(span))
{
return;
}
context.CancellationToken.ThrowIfCancellationRequested();
ContainsYieldWalker walker = ContainsYieldWalker.GetInstance();
walker.VisitBlock(body);
YieldStatementSyntax yieldStatement = walker.YieldStatement;
ContainsYieldWalker.Free(walker);
if (yieldStatement == null)
{
return;
}
if (yieldStatement.SpanStart < statements[index].Span.End)
{
return;
}
DiagnosticHelpers.ReportDiagnostic(context,
DiagnosticDescriptors.ValidateArgumentsCorrectly,
Location.Create(body.SyntaxTree, new TextSpan(statements[index + 1].SpanStart, 0)));
}
