06/43: gnu: Add rust-discard.

[guix-commits]

efraim pushed a commit to branch master
in repository guix.

commit b97712821231e2f846f9c14a906a191125490bb1
Author: Efraim Flashner <address@hidden>
Date:   Sun Aug 4 12:53:50 2019 +0300

    gnu: Add rust-discard.
    
    * gnu/packages/crates-io.scm (rust-discard): New variable.
---
 gnu/packages/crates-io.scm | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 7ba20a0..3f9bc1f 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -112,6 +112,26 @@ depending on a large number of #[cfg] parameters.  
Structured like an
     (license (list license:asl2.0
                    license:expat))))
 
+(define-public rust-discard
+  (package
+    (name "rust-discard")
+    (version "1.0.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "discard" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "1h67ni5bxvg95s91wgicily4ix7lcw7cq0a5gy9njrybaibhyb91"))))
+    (build-system cargo-build-system)
+    (home-page "https://github.com/Pauan/rust-discard";)
+    (synopsis "Allow for intentionally leaking memory")
+    (description "There are situations where you need to intentionally leak 
some
+memory but not other memory.  This package provides a discard trait which 
allows
+for intentionally leaking memory")
+    (license license:expat)))
+
 (define-public rust-proc-macro2
   (package
     (name "rust-proc-macro2")