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Re: Enable truncation of exception output
From: |
Andy Wingo |
Subject: |
Re: Enable truncation of exception output |
Date: |
Fri, 10 Mar 2017 09:47:13 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) |
On Fri 03 Feb 2017 14:40, Daniel Llorens <address@hidden> writes:
> The patch to master (ice-9 boot-9) lets you override the (format) used
> internally by the exception printers. Then I rewrite the format string
> in user code, see below. It's a bit hacky, maybe someone has a better
> solution.
>
> See also the other patch I've posted to the list to support arrays in
> (truncated-print). The patches are independent, but they make each
> other useful so to speak.
I have a crazy idea :) What about, we just let (ice-9 format) be
"format" ? Right now loading (ice-9 format) does a set! to format, as
you know, overriding the core binding. This is unnecessary and
complicated. I see that using (ice-9 format) only adds 50 KB to the
2828-KB baseline of private dirty memory. Then we can use :@y
directly in the format strings and we can avoid all the monkeypatching.
There are only a couple instances of calls to scm_simple_format in
libguile and they can be replaced, so we don't have C bootstrapping
concerns. Guile users calling scm_simple_format would do a pthread_once
load to the "format" binding in the root module. In boot-9, we start
with a simple boot definition (for boot-time errors) then replace it
with (module-ref (resolve-interface '(ice-9 format) 'format)) at the
end.
Maybe Ludovic has a thought here :)
Andy
- Re: Enable truncation of exception output,
Andy Wingo <=