gnu: Add rust-clap-lex-0.2.

* gnu/packages/crates-io.scm (rust-clap-lex-0.2): New variable.

Signed-off-by: Andrew Tropin <andrew@trop.in>

gnu/packages/crates-io.scm

@@ -68473,6 +68473,28 @@ character.")
       "This package provides a library to unify commandline arguments with config files and environment variables.  And make it easier for users to tell your program how to behave across the three main input sources")
     (license license:expat)))
 
+(define-public rust-clap-lex-0.2
+  (package
+    (name "rust-clap-lex")
+    (version "0.2.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "clap_lex" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1ib1a9v55ybnaws11l63az0jgz5xiy24jkdgsmyl7grcm3sz4l18"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs (("rust-os-str-bytes" ,rust-os-str-bytes-6))))
+    (home-page "https://github.com/clap-rs/clap/tree/master/clap_lex")
+    (synopsis "Command-line parser for Rust")
+    (description "This package provides a command-line parser for Rust.  As
+opposed to a declarative parser, @code{rust-clap-lex} processes arguments as a
+stream of tokens.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public svd2rust
   (package
     (name "svd2rust")