Classes should not have only "private" constructors

A class with only private constructors can't be instantiated, thus, it seems to be pointless code.

Noncompliant Code Example

public class MyClass // Noncompliant
{
  private MyClass() { ... }
}

Compliant Solution

public class MyClass 
{
  public MyClass() { ... }
}

Exceptions

Classes that themselves access their private constructors (singletons or smart enums) are ignored. Classes with only static members are also ignored because they are covered by Rule S1118.