Changes all around - objects and GC

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/obj/mod.rs

@@ -4,6 +4,13 @@ pub mod dict;
 pub mod error;
 pub mod fun;
 //pub mod num;
+pub mod ns {
+    use crate::{mem::ptr::DynRef, obj::Sym};
+    use std::collections::BTreeMap;
+
+    /// A namespace
+    pub type Ns = BTreeMap<Sym, DynRef>;
+}
 pub mod str;
 pub mod sym {
     pub type Sym = usize;
@@ -12,22 +19,21 @@ pub mod sym {
 
 pub mod prelude {
     pub use crate::{
-        obj::{
-            Attrs, Dict, DictRef, Fun, NativeFun, Str, StrRef, Sym, ObjCtx, Obj,
-        },
         mem::{
-            ptr::{ObjRef, DynRef},
-            intern::Intern,
             gc::Gc,
-        }
+            intern::Intern,
+            ptr::{DynRef, ObjRef},
+        },
+        obj::{Attrs, AttrsRef, Dict, DictRef, Fun, NativeFun, Ns, Obj, ObjCtx, Str, StrRef, Sym},
     };
 }
 
 pub use self::{
-    attrs::Attrs,
+    attrs::{Attrs, AttrsBuilder, AttrsRef},
     ctx::ObjCtx,
     dict::{Dict, DictRef},
-    fun::{NativeFun, Fun},
+    fun::{Fun, NativeFun},
+    ns::Ns,
     str::{Str, StrRef},
     sym::Sym,
 };