[bug#61561] [PATCH 2/5] gnu: add rust-downcast

[Steve George]

* gnu/packages/crates-io.scm (rust-downcast-0.11): New variable.
---

 gnu/packages/crates-io.scm | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/crates-io.scm b/gnu/packages/crates-io.scm
index 355c8ef761..180b0838a9 100644
--- a/gnu/packages/crates-io.scm
+++ b/gnu/packages/crates-io.scm
@@ -17761,6 +17761,28 @@ (define-public rust-document-features-0.2
 @code{Cargo.toml}.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-downcast-0.11
+  (package
+    (name "rust-downcast")
+    (version "0.11.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "downcast" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1wa78ahlc57wmqyq2ncr80l7plrkgz57xsg7kfzgpcnqac8gld8l"))))
+    (build-system cargo-build-system)
+    (arguments
+     `( #:skip-build? #f))
+    (home-page "https://github.com/fkoep/downcast-rs";)
+    (synopsis
+     "Trait for downcasting trait objects back to their original types")
+    (description
+     "A trait, and utilities, for downcasting trait objects back
+to their original types.  The same as the rust-downcast-rs crate.")
+    (license license:expat)))
+
 (define-public rust-downcast-rs-1
   (package
     (name "rust-downcast-rs")
@@ -42372,7 +42394,7 @@ (define-public rust-pretty-assertions-0.5
                        ("rust-difference" ,rust-difference-2))))))
 
 (define-public rust-pretty-assertions-0.4
-  (package
+ (package
     (inherit rust-pretty-assertions-0.6)
     (name "rust-pretty-assertions")
     (version "0.4.1")
-- 
2.39.1