From: Andy Wingo <wingo@pobox.com>
To: Koz Ross <koz.ross@retro-freedom.nz>
Cc: ludo@gnu.org, 21944@debbugs.gnu.org
Subject: bug#21944: Error on ordering of define-record-type and define-public in a module is unhelpful - possible improvement?
Date: Mon, 27 Jun 2016 10:32:59 +0200 [thread overview]
Message-ID: <87inwv8210.fsf@pobox.com> (raw)
In-Reply-To: <874m8f9i02.fsf@pobox.com> (Andy Wingo's message of "Mon, 27 Jun 2016 10:02:37 +0200")
On Mon 27 Jun 2016 10:02, Andy Wingo <wingo@pobox.com> writes:
> Apparently the reason this doesn't work in Guile right now is that the
> compiler currently reads and compiles one Scheme expression at a time,
> then stitches them together on the Tree-IL level. Incidentally,
> `primitive-load' works in the same way for the interpreter: it reads and
> eval's single expressions in a loop. We could change this to have Guile
> read the whole file and pass it all to the expander at once, within a
> `begin'. This has some user-visible changes though:
>
> * if evaluating an expression throws an error, primitive-load doesn't
> read the following expressions and so doesn't detect syntax errors;
> try a file like this:
>
> (error "what")
> )
>
> With the interpreter (primitive-load) you will get the "what" error,
> not a syntax error. (Yes the unclosed paren hurts my eyeballs but I
> wanted to demonstrate a syntax error. Here's a matching paren:
> ")".)
>
> * Procedural macros won't be able to use bindings defined previously
> in the file unless they are eval-whenned. Of course this already
> breaks in the compiler, but it succeeds in the interpreter.
Another user-visible change: changes to read-options would not take
effect in the same places.
Andy
next prev parent reply other threads:[~2016-06-27 8:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-17 8:27 bug#21944: Error on ordering of define-record-type and define-public in a module is unhelpful - possible improvement? Koz Ross
2016-06-26 21:06 ` Andy Wingo
2016-06-27 8:02 ` Andy Wingo
2016-06-27 8:32 ` Andy Wingo [this message]
2016-06-27 16:10 ` Mark H Weaver
2016-06-27 21:22 ` Andy Wingo
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