From c23a1e22ab8222ee1c1d4bf110f6c27677c730a3 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Wed, 2 Dec 2015 11:44:31 +0100
Subject: [PATCH] Implement helper write_with_parser()

---
 src/storage/backend.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/storage/backend.rs b/src/storage/backend.rs
index 12873509..e2cbd1c6 100644
--- a/src/storage/backend.rs
+++ b/src/storage/backend.rs
@@ -253,3 +253,18 @@ impl Display for StorageBackendError {
     }
 }
 
+
+fn write_with_parser<'a, HP>(f: &File, p: &Parser<HP>) -> Result<String, StorageBackendError>
+    where HP: FileHeaderParser
+{
+    p.write(f.contents())
+        .or_else(|err| {
+            let mut serr = StorageBackendError::build(
+                "Parser::write()",
+                "Cannot translate internal representation of file contents into on-disk representation",
+                None
+            );
+            serr.caused_by = Some(Box::new(err));
+            Err(serr)
+        })
+}