static int
clone_method(ID mid, NODE *body, VALUE nklass)
{
NODE *fbody = body->nd_body;
if (fbody) {
VALUE nbody;
switch (nd_type(fbody)) {
case NODE_SCOPE:
fbody = rb_copy_node_scope(fbody, ruby_cref);
break;
case NODE_BMETHOD:
nbody = rb_block_dup(fbody->nd_cval, nklass, (VALUE)ruby_cref);
fbody = NEW_BMETHOD(nbody);
break;
case NODE_DMETHOD:
nbody = rb_method_dup(fbody->nd_cval, nklass, (VALUE)ruby_cref);
fbody = NEW_DMETHOD(nbody);
break;
}
}
st_insert(RCLASS(nklass)->m_tbl, mid, (st_data_t)NEW_METHOD(fbody, body->nd_noex));
return ST_CONTINUE;
}
static VALUE
rb_mod_define_method(int argc, VALUE *argv, VALUE mod)
{
ID id;
VALUE body;
NODE *node;
int noex = NOEX_PUBLIC;
if (argc == 1) {
id = rb_to_id(argv[0]);
body = rb_block_lambda();
}
else if (argc == 2) {
id = rb_to_id(argv[0]);
body = argv[1];
if (!rb_obj_is_method(body) && !rb_obj_is_proc(body)) {
rb_raise(rb_eTypeError,
"wrong argument type %s (expected Proc/Method)",
rb_obj_classname(body));
}
}
else {
rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc);
}
if (RDATA(body)->dmark == (RUBY_DATA_FUNC) bm_mark) {
struct METHOD *method = (struct METHOD *)DATA_PTR(body);
VALUE rklass = method->rklass;
if (rklass != mod) {
if (FL_TEST(rklass, FL_SINGLETON)) {
rb_raise(rb_eTypeError,
"can't bind singleton method to a different class");
}
if (!RTEST(rb_class_inherited_p(mod, rklass))) {
rb_raise(rb_eTypeError,
"bind argument must be a subclass of %s",
rb_class2name(rklass));
}
}
node = method->body;
}
else if (rb_obj_is_proc(body)) {
rb_proc_t *proc;
body = proc_dup(body);
GetProcPtr(body, proc);
if (BUILTIN_TYPE(proc->block.iseq) != T_NODE) {
proc->block.iseq->defined_method_id = id;
proc->block.iseq->klass = mod;
proc->is_lambda = Qtrue;
}
node = NEW_BMETHOD(body);
}
else {
/* type error */
rb_raise(rb_eTypeError, "wrong argument type (expected Proc/Method)");
}
/* TODO: visibility */
rb_add_method(mod, id, node, noex);
return body;
}