add NamedType (#527)

packages/n/named_type/xmake.lua

@@ -0,0 +1,18 @@
+package("named_type")
+
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/joboccara/NamedType")
+    set_description("Implementation of strong types in C++.")
+    set_license("MIT")
+
+    add_urls("https://github.com/joboccara/NamedType.git")
+
+    add_versions("v1.1.0.20210209", "c119054eac4b8f3599233ff480ad1ce4309a52ad")
+
+    on_install(function (package)
+        os.cp("include/NamedType", package:installdir("include"))
+    end)
+
+    on_test(function (package)
+        assert(package:has_cxxtypes("fluent::NamedType<int, struct TestTag>", {configs = {languages = "c++14"}, includes = "NamedType/named_type.hpp"}))
+    end)