One of the biggest set of changes needed to make C++ compile, is that you
can't autoconvert "void*" to a different pointer type without a cast (you
can of course, convert pointers *to* "void*"!)
For the first part, convert the users of "mrb_obj_alloc". Since it has
to return something, make it RBasic* (that's what mrb_obj_alloc() is
operating on anyway). This way, even in C you'll get a warning if you
don't cast it.
For places where there are a lot of similar calls to mrb_obj_alloc(),
this can be easily hidden through a macro. I did this in string.c:
#define mrb_obj_alloc_string(mrb) ((struct RString *) mrb_obj_alloc((mrb), MRB_TT_STRING, (mrb)->string_class))
I also updated the mrb_object() macro to also return a RBasic* -- my
previous commit changed that from "void*" -> "RObject*", but I figure
it should be consistent with mrb_obj_alloc()
The following is legal code in both C and C++:
struct foo {
struct bar { int a } x;
int y;
};
...however in C++ it defines a type called "foo::bar" instead of "bar".
Just avoid this construct altogether
It doesn't appear to serve any purpose and allows removing warning about various unused variables littered around.
Signed-off-by: Patrick Hogan <pbhogan@gmail.com>
Yukihiro Matsumoto