| From: | "Greg Stark" <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | "Dimitri Fontaine" <dfontaine(at)hi-media(dot)com> |
| Cc: | "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com>, "Heikki Linnakangas" <heikki(dot)linnakangas(at)enterprisedb(dot)com>, "David E(dot) Wheeler" <david(at)kineticode(dot)com>, "Bruce Momjian" <bruce(at)momjian(dot)us>, "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Grzegorz Jaskiewicz" <gj(at)pointblue(dot)com(dot)pl>, "PostgreSQL Hackers" <pgsql-hackers(at)postgresql(dot)org>, "Peter Eisentraut" <peter_e(at)gmx(dot)net> |
| Subject: | Re: WIP: default values for function parameters |
| Date: | 2008-12-12 15:31:46 |
| Message-ID: | 4136ffa0812120731y737f5eb3wfa3f969789581530@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Dec 12, 2008 at 3:11 PM, Dimitri Fontaine
<dfontaine(at)hi-media(dot)com> wrote:
> That's why I'm preferring the common-lisp syntax of :param value, or its
> variant param: value.
FWIW there is no such common-lisp syntax. Colon is just a regular
symbol character and :param is just a regular symbol in common-lisp.
There is a convention that functions parse their argument lists
looking for such tokens as indicators of what to do with the next
argument but it's purely a convention. There's no syntactic
significance to the colon.
A similar problem arises with using Perl as a precedent. => is just a
regular operator in perl which quotes the lhs as a string if it's a
simple token and otherwise behaves just like a comma. That would be
very different from what we're talking about having it do here.
--
greg
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