In ActionScript 3, constructor code is always interpreted rather than compiled by the JIT at runtime, which is why the body of a constructor should be as lightweight as possible. As soon as a constructor contains branches ("if", "for", "switch", ...) an issue is logged.

Noncompliant Code Example

public class Foo
{
  public function Foo()
  {
    if (condition) {  // Noncompliant
      // ...
    }
  }
}

Compliant Solution

public class Foo
{
  public function Foo()
  {
    init()
  }

  private function init():void
  {
    if (condition) {
      // ...
    }
  }
}