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authorLudovic Courtès <ludo@gnu.org>2015-01-18 17:38:15 +0100
committerLudovic Courtès <ludo@gnu.org>2015-01-18 17:38:15 +0100
commit5808dcc27cf7288afcd3fa01c0b9e4669b697765 (patch)
tree4e1b49a7c58debe69b13445a3fbe519488307742 /guix
parent561fb6c31fbbc9ae91bc2ce338cefc841b284644 (diff)
store: Change 'store-lower' to preserve the original procedure's documentation.
* guix/store.scm (preserve-documentation): New procedure. (store-lift, store-lower): Use it.
Diffstat (limited to 'guix')
-rw-r--r--guix/store.scm23
1 files changed, 13 insertions, 10 deletions
diff --git a/guix/store.scm b/guix/store.scm
index c3a1c57943..63425b3023 100644
--- a/guix/store.scm
+++ b/guix/store.scm
@@ -862,23 +862,26 @@ be used internally by the daemon's build hook."
(define-alias store-return state-return)
(define-alias store-bind state-bind)
+(define (preserve-documentation original proc)
+ "Return PROC with documentation taken from ORIGINAL."
+ (set-object-property! proc 'documentation
+ (procedure-property original 'documentation))
+ proc)
+
(define (store-lift proc)
"Lift PROC, a procedure whose first argument is a connection to the store,
in the store monad."
- (define result
- (lambda args
- (lambda (store)
- (values (apply proc store args) store))))
-
- (set-object-property! result 'documentation
- (procedure-property proc 'documentation))
- result)
+ (preserve-documentation proc
+ (lambda args
+ (lambda (store)
+ (values (apply proc store args) store)))))
(define (store-lower proc)
"Lower PROC, a monadic procedure in %STORE-MONAD, to a \"normal\" procedure
taking the store as its first argument."
- (lambda (store . args)
- (run-with-store store (apply proc args))))
+ (preserve-documentation proc
+ (lambda (store . args)
+ (run-with-store store (apply proc args)))))
;;
;; Store monad operators.