Front page | perl.perl5.porters |
Postings from October 2003
It was Monday, October 06, 2003 when Gisle Aas took the soap box, saying:
: I've noticed that the documentation of bless already says "Make sure
: that CLASSNAME is a true value" and have said that for a long time. I
: think we could simply enforce that and disallow all of these:
:
: bless $thing, 0
: bless $thing, "";
: bless $thing, undef;
As a side note, it's difficult to have a useful class (package) name
that is a numeral anyway.
[cwest@casey cwest]$ perl -e'package 0'
syntax error at -e line 1, near "package 0"
Execution of -e aborted due to compilation errors.
[cwest@casey cwest]$ perl -e'package 1'
syntax error at -e line 1, near "package 1"
Execution of -e aborted due to compilation errors.
[cwest@casey cwest]$ perl -e'package 100'
syntax error at -e line 1, near "package 100"
Execution of -e aborted due to compilation errors.
Of course, the documentation does state that namespaces shouldn't
begin with a digit.
[cwest@casey cwest]$ perl -e'package 100a'
syntax error at -e line 1, near "package 100"
Execution of -e aborted due to compilation errors.
Perl becomes even more upset when you try and circumvent further.
[cwest@casey cwest]$ perl -e'sub 100::foo { "hi" }'
Illegal declaration of anonymous subroutine at -e line 1.
Then, of course, there are the jokers.
[cwest@casey cwest]$ perl -le'sub UNIVERSAL::foo { "hi" } print +(bless [],0)->foo'
hi
I guess my point is, Perl has had this restriction in many forms,
moving it along to bless() would not be a problem in my mind.
Casey West
--
Shooting yourself fin the foot with Algol
You shoot yourself in the foot with a musket. The musket is
aesthetically fascinating, and the wound baffles the adolescent medic
in the emergency room.
Thread Previous
|
Thread Next