No segfault -> null == ""

[Sergey Gromov]

Tue, 31 Mar 2009 16:29:30 +0200, Qian Xu wrote:

> When I was trying to learn how char-array works, I found something
> unexpected.
> 
> -------------------------- code ------------------------------
> module string_test;
> 
> void main()
> {
>   // test 1
>   assert(null == "", "null is empty"); // No segfault

When you compare null to an array, null is first converted into an empty
array, then a comparison takes place.  This happens because arguments to
comparison operator are first converted to a common type.