boost_pfr: add package (#6848)

* boost_pfr: add package

* Trigger CI

* add git url

---------

Co-authored-by: star9029 <[email protected]>

packages/b/boost_pfr/xmake.lua

@@ -0,0 +1,26 @@
+package("boost_pfr")
+    set_kind("library", {headeronly = true})
+    set_homepage("https://github.com/boostorg/pfr")
+    set_description("C++14 library for struct reflection")
+    set_license("BSL-1.0")
+
+    add_urls("https://github.com/boostorg/pfr/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/boostorg/pfr.git")
+
+    add_versions("2.2.0", "6f490ec1383de5855dcf801c23f0a967f888eb6e1440b6ca0bf36c12d4ae7ac7")
+    add_versions("2.1.0", "7c18a4ab73b70f8b3513fa3a836c6f4310f627bbf55f62b89bdd7aa787c7da31")
+
+    on_install(function (package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            #include <boost/pfr.hpp>
+            struct foo { int a; float b; };
+            void test() {
+                foo f{1, 2.0f};
+                boost::pfr::for_each_field(f, [](auto&& field) { field += 1; });
+            }
+        ]]}, {configs = {languages = "c++14"}}))
+    end)