public static void ProcessReturnStatement(ISymbol local, BlockSyntax block, SemanticModel semanticModel, CancellationToken cancellationToken,
RefCounterStatus status)
{
using (var walker = ReturnValueWalker.Borrow(block, Search.TopLevel, semanticModel, cancellationToken))
{
foreach (var value in walker)
{
var returnedSymbol = semanticModel.GetSymbolSafe(value, cancellationToken);
if (SymbolComparer.Equals(local, returnedSymbol))
{
var method = block.FirstAncestor <MethodDeclarationSyntax>();
var access = block.FirstAncestor <AccessorDeclarationSyntax>();
bool isGet = false;
if (method != null)
{
isGet = KnownSymbol.IsGetMethodName(method.Identifier.ToString());
}
else if (access != null)
{
isGet = true;
}
if (isGet)
{
status.RemainRef("return value from get method", value.GetLocation());
}
else
{
status.ReleaseReference("return value from non get", value.GetLocation());
}
}
}
}
}
public static void ProcessRightOfAssignmentToField(
ISymbol variable,
BlockSyntax block,
SemanticModel semanticModel,
CancellationToken cancellationToken,
RefCounterStatus status)
{
List <AssignmentExpressionSyntax> rc = new List <AssignmentExpressionSyntax>();
block?.TryGetAssignment(variable, semanticModel, cancellationToken, rc);
int count = 0;
ISymbol field = null;
Location loc = Location.None;
foreach (AssignmentExpressionSyntax assignment in rc)
{
var classDef = block.FirstAncestor <ClassDeclarationSyntax>();
var classSymbol = CSharpExtensions.GetDeclaredSymbol(semanticModel, classDef, cancellationToken);
if (IsRightOfAssignmentToField(semanticModel, cancellationToken, assignment.Left, out field))
{
count++;
loc = assignment.GetLocation();
if (!field.ContainingType.Equals(classSymbol))
{
status.Skip("assigned to field/property of other class", loc);
}
if (LoopUtils.HasLoopBetween(assignment, block))
{
status.Skip("loop between assignment to field/property and var block", loc);
}
}
}
if (count == 1)
{
status.ReleaseReference("assign to class field/property", loc);
var methodBlock = block?.FirstAncestorOrSelf <BlockSyntax>();
if (methodBlock == null)
{
return;
}
if (RightSideOfAssignmentCount(field, methodBlock, semanticModel, cancellationToken) > 0)
{
status.Skip("var assigned to field/property, which is assigned to others", loc);
}
ChangeReferenceMethodUtils.ProcessIncDelRefInvocation(field, methodBlock, semanticModel, cancellationToken, status);
ReturnUtils.ProcessReturnStatement(field, methodBlock, semanticModel, cancellationToken, status);
}
else if (count > 1)
{
status.Skip("multiple assign to field/property", loc);
}
}
