private static void Analyze(SyntaxNodeAnalysisContext context, SwitchExpressionSyntaxWrapper switchExpression)
{
var arms = switchExpression.Arms;
if (arms.Count < 2)
{
return;
}
var firstArm = arms[0];
if (switchExpression.HasDiscardPattern() &&
arms.Skip(1).All(arm => SyntaxFactory.AreEquivalent(arm.Expression, firstArm.Expression)))
{
context.ReportDiagnostic(Diagnostic.Create(rule, switchExpression.SwitchKeyword.GetLocation(), StatementsMessage));
}
}
private static SwitchExpressionType EvaluateType(SwitchExpressionSyntaxWrapper switchExpression)
{
var numberOfArms = switchExpression.Arms.Count;
if (numberOfArms > 2)
{
return SwitchExpressionType.ManyReturnValues;
}
var hasDiscardValue = switchExpression.HasDiscardPattern();
if (numberOfArms == 2)
{
return hasDiscardValue ? SwitchExpressionType.TwoReturnValues : SwitchExpressionType.ManyReturnValues;
}
if (numberOfArms == 1)
{
return hasDiscardValue ? SwitchExpressionType.SingleReturnValue : SwitchExpressionType.TwoReturnValues;
}
return SwitchExpressionType.SingleReturnValue;
}
