wantarray - get void vs scalar vs list context of current subroutine call |
wantarray - get void vs scalar vs list context of current subroutine call
wantarray
Returns true if the context of the currently executing subroutine or
eval
is looking for a list value. Returns false if the context is
looking for a scalar. Returns the undefined value if the context is
looking for no value (void context).
return unless defined wantarray; # don't bother doing more my @a = complex_calculation(); return wantarray ? @a : "@a";
wantarray()
's result is unspecified in the top level of a file,
in a BEGIN
, CHECK
, INIT
or END
block, or in a DESTROY
method.
This function should have been named wantlist()
instead.
wantarray - get void vs scalar vs list context of current subroutine call |