Description:
------------
Reading the code for next PHP5.4, I saw four new tokens, amongs them is T_CALLABLE.
I thought this would tag any "callable" keyword in the source.
But using token_get_all(), I can't get a T_CALLABLE token. See test script.

Btw, UPGRADING doesn't mention these four new tokens (T_TRAIT, T_TRAIT_C, T_CALLABLE, T_INSTEADOF)

Test script:
---------------
<?php

$a = '<?php function(callable $a){};';

foreach (token_get_all($a) as $a)
{
	if (isset($a[1])) echo token_name($a[0]), ': ', $a[1], "\n";
	else echo $a, "\n";
}

Expected result:
----------------
T_OPEN_TAG: <?php
T_FUNCTION: function
(
T_CALLABLE: callable 
T_WHITESPACE:
T_VARIABLE: $a
)
{
}
;


Actual result:
--------------
T_OPEN_TAG: <?php
T_FUNCTION: function
(
T_STRING: callable // Why T_STRING ???
T_WHITESPACE:
T_VARIABLE: $a
)
{
}
;