@@ -2691,3 +2691,35 @@ (define-public tsl-ordered-map
(description "This package provides a C++ implementation of a hash map and
a hash set which preserve the order of insertion.")
(license license:expat)))
+
+(define-public tl-optional
+ (package
+ (name "tl-optional")
+ (version "1.1.0")
+ (source (origin
+ (method git-fetch)
+ (uri (git-reference
+ (url "https://github.com/TartanLlama/optional")
+ (commit (string-append "v" version))))
+ (file-name (git-file-name name version))
+ (sha256
+ (base32
+ "0qkjplmhilbi1iqxx3pz0grcx5355ymk6wwd4h4309mk156xgx2q"))))
+ (build-system cmake-build-system)
+ (arguments
+ (list
+ #:phases
+ #~(modify-phases %standard-phases
+ (add-after 'unpack 'patch-cmake-test
+ (lambda _
+ (substitute* "CMakeLists.txt"
+ (("FetchContent_Declare.*") "")
+ ((".*http.*catchorg/Catch2.*") "")
+ (("FetchContent_MakeAvailable\\(Catch2\\)")
+ "find_package(Catch2 REQUIRED)")))))))
+ (native-inputs (list catch2))
+ (home-page "https://github.com/TartanLlama/optional")
+ (synopsis "C++11/14/17 implementation of std::optional with extensions")
+ (description "tl-optional is a single-header implementation of
+std::optional with functional-style extensions and support for references.")
+ (license license:cc0)))