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Type:
Code Smell Detection
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Status: Active
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Resolution: Unresolved
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Message:Remove this empty "default" clause.
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Highlighting:
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Default Severity:Minor
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Impact:Low
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Likelihood:Low
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Covered Languages:C#
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Remediation Function:Constant/Issue
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Constant Cost:1min
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Analysis Scope:Main Sources, Test Sources
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ReSharper:RedundantEmptyDefaultSwitchBranch
The default clause should take appropriate action. Having an empty default is a waste of keystrokes.
Noncompliant Code Example
enum Fruit { Apple, Orange, Banana } void PrintName(Fruit fruit) { switch(fruit) { case Fruit.Apple: Console.WriteLine("apple"); break; default: //Noncompliant break; } }
Compliant Solution
enum Fruit { Apple, Orange, Banana } void PrintName(Fruit fruit) { switch(fruit) { case Fruit.Apple: Console.WriteLine("apple"); break; default: throw new NotSupportedException(); } }
or
void PrintName(Fruit fruit)
{
switch(fruit)
{
case Fruit.Apple:
Console.WriteLine("apple");
break;
}
}
Exceptions
default clauses containing only a comment are ignored with the assumption that they are empty on purpose and the comment documents why.