Re: Mini-Tutorial: Scalar vs List Assignment Operator

[JavaFan]

in reply to Mini-Tutorial: Scalar vs List Assignment Operator

Beside my (...) there are also our (...) and local (...) that generate list context. sub (...) with sub an lvalue subroutine doesn't generate list context.

[ikegami]

Thanks. Fixed.

Yes, there's nothing special about lvalue subs. f() doesn't cause the list assignment operator to be used, but (f()) does.

$ perl -wle'sub f :lvalue { $x,$y } f()=(4,5); print $x,$y'
Useless use of a constant in void context at -e line 1.
Use of uninitialized value in print at -e line 1.
5

$ perl -wle'sub f :lvalue { $x,$y } (f())=(4,5); print $x,$y'
45