--- Begin Message ---
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Subject: |
guile: add repl-option for customized print |
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Date: |
Tue, 04 Dec 2012 11:46:53 +0800 |
Package: guile
Severity: wishlist
Tags: patch
X-Debbugs-CC: nalaginrut <address@hidden>
Dear maintainer
The attached patch adds a new repl-option to set a custom print
procedure.
--
scheme@(guile-user)> (use-modules (srfi srfi-1))
scheme@(guile-user)> (iota 20)
$1 = (0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19)
scheme@(guile-user)> (define (repl-print* repl val)
(if (not (eq? val *unspecified*))
(begin
(run-hook before-print-hook val)
(format #t "address@hidden" val)
(newline))))
scheme@(guile-user)> (use-modules (system repl common))
scheme@(guile-user)> (repl-option-set! (car (fluid-ref *repl-stack*)) 'print
repl-print*)
scheme@(guile-user)> (iota 20)
$2 = (0 1 2 3 4 5 6 7 …)
>From b0cadcb69a12a4ed2a205f4854af41bf926da20b Mon Sep 17 00:00:00 2001
From: Daniel Hartwig <address@hidden>
Date: Tue, 4 Dec 2012 11:41:35 +0800
Subject: [PATCH] repl: add repl-option for customized print
* module/system/repl/common.scm (repl-default-options)
(repl-print): Add option to use customized print procedure.
* doc/ref/scheme-using.texi (REPL Commands): Update.
---
doc/ref/scheme-using.texi | 4 ++++
module/system/repl/common.scm | 26 +++++++++++++++++---------
2 files changed, 21 insertions(+), 9 deletions(-)
diff --git a/doc/ref/scheme-using.texi b/doc/ref/scheme-using.texi
index 7eb84de..4f9e6db 100644
--- a/doc/ref/scheme-using.texi
+++ b/doc/ref/scheme-using.texi
@@ -445,6 +445,10 @@ choice is available. Off by default (indicating
compilation).
@item prompt
A customized REPL prompt. @code{#f} by default, indicating the default
prompt.
address@hidden print
+A procedure of two arguments used to print the result of evaluating each
+expression. The arguments are the current REPL and the value to print.
+By default, @code{#f}, to use the default procedure.
@item value-history
Whether value history is on or not. @xref{Value History}.
@item on-error
diff --git a/module/system/repl/common.scm b/module/system/repl/common.scm
index 346ba99..fd41b09 100644
--- a/module/system/repl/common.scm
+++ b/module/system/repl/common.scm
@@ -119,6 +119,11 @@ See <http://www.gnu.org/licenses/lgpl.html>, for more
details.")
((thunk? prompt) (lambda (repl) (prompt)))
((procedure? prompt) prompt)
(else (error "Invalid prompt" prompt)))))
+ (print #f ,(lambda (print)
+ (cond
+ ((not print) #f)
+ ((procedure? print) print)
+ (else (error "Invalid print procedure" print)))))
(value-history
,(value-history-enabled?)
,(lambda (x)
@@ -206,15 +211,18 @@ See <http://www.gnu.org/licenses/lgpl.html>, for more
details.")
(% (thunk))))
(define (repl-print repl val)
- (if (not (eq? val *unspecified*))
- (begin
- (run-hook before-print-hook val)
- ;; The result of an evaluation is representable in scheme, and
- ;; should be printed with the generic printer, `write'. The
- ;; language-printer is something else: it prints expressions of
- ;; a given language, not the result of evaluation.
- (write val)
- (newline))))
+ (cond
+ ((repl-option-ref repl 'print)
+ => (lambda (print) (print repl val)))
+ ((not (eq? val *unspecified*))
+ (begin
+ (run-hook before-print-hook val)
+ ;; The result of an evaluation is representable in scheme, and
+ ;; should be printed with the generic printer, `write'. The
+ ;; language-printer is something else: it prints expressions of
+ ;; a given language, not the result of evaluation.
+ (write val)
+ (newline)))))
(define (repl-option-ref repl key)
(cadr (or (assq key (repl-options repl))
--
1.7.10.4
--- End Message ---
--- Begin Message ---
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Subject: |
Re: bug#13077: guile: add repl-option for customized print |
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Date: |
Mon, 10 Dec 2012 23:26:12 +0100 |
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User-agent: |
Gnus/5.130005 (Ma Gnus v0.5) Emacs/24.2 (gnu/linux) |
Hi Daniel,
Daniel Hartwig <address@hidden> skribis:
> scheme@(guile-user)> (define (repl-print* repl val)
> (format #t "address@hidden" val)
> (newline))
> scheme@(guile-user)> (use-modules (system repl common))
> scheme@(guile-user)> (repl-option-set! (car (fluid-ref *repl-stack*))
> 'print repl-print*)
> scheme@(guile-user)> (use-modules (srfi srfi-1))
> scheme@(guile-user)> (iota 20)
> $1 = (0 1 2 3 4 5 6 7 …)
Nice.
> From 2251a259058524fbe631fd287c95b43882227f79 Mon Sep 17 00:00:00 2001
> From: Daniel Hartwig <address@hidden>
> Date: Tue, 4 Dec 2012 11:41:35 +0800
> Subject: [PATCH] repl: add repl-option for customized print
>
> * module/system/repl/common.scm (repl-default-options)
> (repl-print): Add option to use customized print procedure.
> * doc/ref/scheme-using.texi (REPL Commands): Update.
Applied, thanks!
Ludo’.
--- End Message ---