[OCaml] Fix the wrapmacro test

Add a typecheck typemap for size_t and const size_t &.

Add the const qualifier to the typemaps for primitive reference
types.

Add multiple runtime tests.

Examples/ocaml/argout_ref/example.i

@@ -1,13 +1,13 @@
 /* File : example.i */
 %module example
 
-%typemap(argout) (int &x, int &y) {
+%typemap(argout) (const int &x, const int &y) {
   swig_result = caml_list_append(swig_result, caml_val_int(*$1));
   swig_result = caml_list_append(swig_result, caml_val_int(*$2));
 }
 
 %{
-extern "C" void   factor(int &x, int &y);
+extern "C" void factor(const int &x, const int &y);
 %}
 
-extern "C" void   factor(int &x, int &y);
+extern "C" void factor(const int &x, const int &y);

Examples/test-suite/ocaml/global_vars_runme.ml

@@ -0,0 +1,15 @@
+open Swig
+open Global_vars
+
+_init '()
+
+let _ =
+  assert (_b '() as string = "string b");
+  assert (_b '("a string value") as string = "a string value");
+  assert (_b '() as string = "a string value");
+  assert (_x '() as int = 1234);
+  assert (_x '(9876) as int = 9876);
+  assert (_x '() as int = 9876);
+  assert (_Hi '() as int = 0);
+  assert (_Hola '() as int = 1);
+;;

Examples/test-suite/ocaml/reference_global_vars_runme.ml

@@ -22,7 +22,7 @@ let _ =
 
   let _ = _var_short (_createref_short (C_short 10)) in
   assert (_value_short (_var_short '()) as int = 10);
-  
+
   let _ = _var_unsigned_short (_createref_unsigned_short (C_ushort 10)) in
   assert (_value_unsigned_short (_var_unsigned_short '()) as int = 10);
 

Examples/test-suite/ocaml/sizet_runme.ml

@@ -0,0 +1,10 @@
+open Swig
+open Sizet
+
+let _ =
+  let s = C_int64 2000L in
+  assert (_test1 '(s) as int = 2000);
+  assert (_test2 '(s) as int = 2000);
+  assert (_test3 '(s) as int = 2000);
+  assert (_test4 '(s) as int = 2000);
+;;

Examples/test-suite/ocaml/typedef_reference_runme.ml

@@ -0,0 +1,11 @@
+open Swig
+open Typedef_reference
+
+let _ =
+  let i = _copy_intp '(2) in
+  assert (_somefunc '(i) as int = 2);
+  assert (_delete_intp '(i) = C_void);
+  let i = _copy_intp '(3) in
+  assert (_otherfunc '(i) as int = 3);
+  assert (_delete_intp '(i) = C_void);
+;;

Examples/test-suite/ocaml/wrapmacro_runme.ml

@@ -0,0 +1,10 @@
+open Swig
+open Wrapmacro
+
+let _ =
+  let args = C_list [ C_int64 2L ; C_int64 1L ] in
+  assert (_maximum '(args) as int = 2);
+  let args =  C_list [ C_double (2. /. 7.) ; C_double 256. ] in 
+  assert (_maximum '(args) as float = 256.);
+  assert (_GUINT16_SWAP_LE_BE_CONSTANT '(0x1234) as int = 0x3412);
+;;