[Python-Dev] Parrot -- should life imitate satire?

[Thomas Wouters]

On Tue, Jul 31, 2001 at 11:10:50PM +0300, Moshe Zadka wrote:
> On Tue, 31 Jul 2001, Guido van Rossum <guido@zope.com> wrote:

> > Actually, this may not be as big a deal as I thought before.  The PVM
> > doesn't have a lot of knowledge about types built into its instruction
> > set.  It knows a bit about classes, lists, dicts, but not e.g. about
> > ints and strings.  The opcodes are mostly very abstract: BINARY_ADD etc.

> PUSH "1"
> PUSH "2"
> BINARY_ADD

> In Python that gives "12". In Perl that gives 3.
> Unless you suggest a PERL_BINARY_ADD and a PYTHON_BINARY_ADD, I 
> don't see how you can around these things.

The Perl version of the compiled code could of course be

PUSH "1"
COERCE_INT
PUSH "2"
COERCE_INT
BINARY_ADD

for Perl's 

"1" + "2"

and 

PUSH "1"
PUSH "2"
BINARY_ADD

for it's 

"1" . "2"

(or, in the case of variables instead of literals, an explicit
'COERCE_STRING' or whatever.)

-- 
Thomas Wouters <thomas@xs4all.net>

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