About namespaces in Alpha 1.4

Now a few plugin developers will know that "namespaces" are being added into Alpha 1.4 (not sure if they were there already). Now this is quite easy for me to understand as namespaces are basically like packages in Java. However I can't convince myself that you're allowed to do these:

PHP:

$test = new test\example\plugin\Thing();

and I'm really confused with this:

PHP:

if(class_exists("Hello")) {
    // Do stuff
}
/*
Would this count "test\plugin\Hello" or just classes with no namespace defined?
*/
}

Thanks for the help.

So everything above would work?

If you are not using the namespace of the function you can't acces to the function directly.

PHP:

<?php
//Example
//Wrong
if(class_exist("Hello"))
{
    // Do Stuff
}

//Good
if(class_exist("\\test\\plugin\\namespace\\Hello"))
{
    // Do Stuff
}



class_exist()

Add: It is a bad practice to use full namespaces inside the main code (without `use`). It is easier to fix typos with that.

What about no \\ at beginning of string literal?