Re^2: Ampersands and sub speed

[diotalevi]

No... goto() doesn't return to the next statement. This is a fancy way of saying function( @_ ).

[ambrus]

Closer, but they're still not the same. This code works,

sub f { &g; print @_; } sub g { $_[0] .= "o, w"; push @_, "orld\n"; } 
+f($x = "hell");

but if you change it like this, it breaks:

sub f { g(@_); print @_; } sub g { $_[0] .= "o, w"; push @_, "orld\n";
+ } f($x
= "hell");

[diotalevi]

Oh ok. That's even more evil than I would have normally thought. So &do_nothing; is like @_=do_nothing(@_) except that it doesn't make copies like would happen in that snippet.