[PATCH 2/3] utils: Add 'location->source-properties'.

[宋文武]

* guix/utils (location-source->properties): New procedure.
---
 guix/utils.scm | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/guix/utils.scm b/guix/utils.scm
index 1318dac..50f4bcd 100644
--- a/guix/utils.scm
+++ b/guix/utils.scm
@@ -60,6 +60,7 @@
             location-line
             location-column
             source-properties->location
+            location->source-properties
 
             nix-system->gnu-triplet
             gnu-triplet->nix-system
@@ -892,3 +893,10 @@ etc."
     ;; In accordance with the GCS, start line and column numbers at 1.  Note
     ;; that unlike LINE and `port-column', COL is actually 1-indexed here...
     (location file (and line (+ line 1)) col)))
+
+(define (location->source-properties loc)
+  "Return the source property association list based on the info in LOC,
+a location object."
+  `((line     . ,(and=> (location-line loc) 1-))
+    (column   . ,(location-column loc))
+    (filename . ,(location-file loc))))
-- 
2.6.3