cyclone/docs/immutable-obj-notes.md

Immutable , cvar_tag // 7 , eof_tag // 9 , mutex_tag // 14 , cond_var_tag // 6 , closure0_tag // 3 , closure1_tag // 4 , closureN_tag // 5 , macro_tag // 13 , integer_tag // 11 , bignum_tag // 12 , complex_num_tag // 21 , double_tag // 8 , primitive_tag // 17 , symbol_tag // 19

Mutable , bytevector_tag // 1 , pair_tag // 15 , string_tag // 18 , vector_tag // 20

  // weird case, I guess it goes here since we modify members constantly when doing I/O
  , port_tag                // 16 

  // Weird case, could be modified by C code
  , c_opaque_tag            // 2

  // Special case
  , forward_tag             // 10