metalang99: add package (#4544)

* metalang99: add package

* metalang99: test against older version

* metalang99: improve test

* metalang99: use c11 flag

* metalang99: test latest version

packages/m/metalang99/xmake.lua

@@ -0,0 +1,28 @@
+package("metalang99")
+    set_kind("library", { headeronly = true })
+    set_homepage("https://github.com/Hirrolot/metalang99")
+    set_description("Full-blown preprocessor metaprogramming")
+    set_license("MIT")
+
+    add_urls("https://github.com/Hirrolot/metalang99/archive/refs/tags/v$(version).tar.gz",
+        "https://github.com/Hirrolot/metalang99.git")
+
+    add_versions("1.13.2", "912c6d91b872d34d2b6580d25afc38faccacf6c57462ab1c862010ff4afbf790")
+    add_versions("1.13.3", "91fe8d4edcc2e7f91c5b567a2b90f2e30c2373f1ebbabcf209ea0d74f63bc1e9")
+
+    on_install(function(package)
+        os.cp("include", package:installdir())
+    end)
+
+    on_test(function(package)
+        assert(package:check_csnippets({test = [[
+            typedef struct {
+                double width, height;
+            } Rect;
+            #define Rect_new(...) ML99_OVERLOAD(Rect_new_, __VA_ARGS__)
+            #define Rect_new_1(x) { x, x }
+            #define Rect_new_2(x, y) { x, y }
+            static Rect ra = Rect_new(7, 8);
+            static Rect rb = Rect_new(10);
+        ]]}, { configs = { languages = "c11" }, includes = "metalang99.h" }))
+    end)