controlflow

var parameter = parameterInstance.Element;
if (parameter.Kind != ParameterKind.VALUE
    && parameter.Kind != ParameterKind.REFERENCE) return;

controlflow

if (arguments[currentIndex].MatchingParameter?.Element.IndexOf() is {} index && index >= 0)
// vs.
if (arguments[currentIndex].MatchingParameter?.Element.IndexOf() is >= 0 and var index)

controlflow

        case IPredefinedTypeUsage predefinedTypeUsage:
          return predefinedTypeUsage.Parent is IEnumBase
            ? null
            : InspectPredefinedTypeUsage(predefinedTypeUsage, predefinedTypeUsage.ScalarPredefinedTypeName, boundSettingsStore);

controlflow

      public override AbstractValueWithInfo Divide(AbstractValue divisor)
      {
        switch (divisor)
        {
          case Scalar otherScalar when (otherScalar.Value == 0):
            return AbstractValueWithInfo.DivisionByZero;
          case Scalar otherScalar when (otherScalar.Value == 1):
            return new AbstractValueWithInfo(this, ErrorType.DivisionByOne);
          case Scalar otherScalar:
            var result = Divide(myInterval, otherScalar.Value);

controlflow

      var argumentType = typeofExpression.ArgumentType;
      if (!(argumentType is IDeclaredType declaredType)
          || declaredType.IsVoid()
          || declaredType is IDynamicType) return null;

      var typeElement = declaredType.GetTypeElement();
      if (typeElement is ITypeParameter) return null;

      return typeElement?.TypeParameters.Count == 0 ? typeElement : null;

controlflow

var operand = dagOwnerElement.SourceElement is IIsExpression sourceIsExpression ? sourceIsExpression.Operand
  : dagOwnerElement.SourceElement is ISwitchStatement sourceSwitchStatement ? sourceSwitchStatement.GoverningExpression
  : dagOwnerElement.SourceElement is ISwitchExpression sourceSwitchExpression ? sourceSwitchExpression.GoverningExpression
  : null;

controlflow

var str = obj as string;
if (str != null) {
  WriteLine(str.Length);
}

controlflow

var localFunctionDeclaration = declarationStatement.LocalFunctionDeclaration;
if (localFunctionDeclaration != null)
  consumer.Add(localFunctionDeclaration.DeclaredElement);

controlflow

var indexerDeclaration = declaration as IIndexerDeclaration;
if (indexerDeclaration != null)
{
  var arrowClause = indexerDeclaration.ArrowClause;
  if (arrowClause != null)
  {
    var property = indexerDeclaration.DeclaredElement;
    if (property != null)
    {
      ...

controlflow

if (referenceExpression.QualifierType() is IDeclaredType declaredType)
{
  if (declaredType.GetTypeElement() is IStruct @struct && @struct.IsByRefLike)
  {
    consumer.AddHighlighting(new RefStructMethodGroupsError(referenceExpression));
  }
}