From f73286345e8e9cb059f54a9d68fe19e57de75cdc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Mon, 30 Mar 2015 22:59:24 +0200
Subject: [PATCH] gexp: Add printers for <gexp-input> and <gexp-output>.
* guix/gexp.scm (write-gexp-input, write-gexp-output): New procedures.
(<gexp-input>, <gexp-output>): Use them as printers.
---
guix/gexp.scm | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/guix/gexp.scm b/guix/gexp.scm
index de8b7bbb466..a2da72e76c0 100644
--- a/guix/gexp.scm
+++ b/guix/gexp.scm
@@ -179,6 +179,15 @@ (define-record-type <gexp-input>
(output gexp-input-output) ;string
(native? gexp-input-native?)) ;Boolean
+(define (write-gexp-input input port)
+ (match input
+ (($ <gexp-input> thing output #f)
+ (format port "#<gexp-input ~s:~a>" thing output))
+ (($ <gexp-input> thing output #t)
+ (format port "#<gexp-input native ~s:~a>" thing output))))
+
+(set-record-type-printer! <gexp-input> write-gexp-input)
+
(define* (gexp-input thing ;convenience procedure
#:optional (output "out")
#:key native?)
@@ -193,6 +202,13 @@ (define-record-type <gexp-output>
gexp-output?
(name gexp-output-name))
+(define (write-gexp-output output port)
+ (match output
+ (($ <gexp-output> name)
+ (format port "#<gexp-output ~a>" name))))
+
+(set-record-type-printer! <gexp-output> write-gexp-output)
+
(define raw-derivation
(store-lift derivation))
--
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