minimal evaluation

[TomD]

Qian Xu Wrote:

> Hi All,
> 
> Is minimal evaluation always enabled in D?
> 
> I want to write a function IsNull(), so that I can check the precondition as
> follows:
> 
> Â  if (isNull(foo) ||
> Â  Â  Â  isNull(foo.getBar) ||
> Â  Â  Â  isNull(foo.getBar.getBar2)
> Â  {
> Â  Â  return false;
> Â  }
> Â  // normal code goes here
> 
> If an argument is null, the IsNull() will return false. Internally it will
> be logged to console as well.
Make it return true then. An "or" is true when it hits the first
true expression. 

Ciao
TomD