add cppfront (#1500)

packages/c/cppfront/xmake.lua

@@ -0,0 +1,25 @@
+package("cppfront")
+    set_kind("binary")
+    set_homepage("https://github.com/hsutter/cppfront")
+    set_description("A personal experimental C++ Syntax 2 -> Syntax 1 compiler")
+
+    add_urls("https://github.com/hsutter/cppfront.git")
+    add_versions("2022.09.23", "fa65d346996ec472e16c61838fbc7a47736d7872")
+
+    on_install("windows", "linux", function (package)
+        local configs = {}
+        io.writefile("xmake.lua", [[
+            add_rules("mode.release", "mode.debug")
+            target("cppfront")
+               set_kind("binary")
+               add_files("source/*.cpp")
+               add_includedirs("include")
+               set_languages("c++20")
+        ]])
+        import("package.tools.xmake").install(package, configs)
+    end)
+
+    on_test(function (package)
+        os.touch("test.cpp2")
+        os.vrun("cppfront test.cpp2")
+    end)