alias WhatsitTypeId

---

(alias) WhatsitTypeId = (0|1|2|3|4|7|8|9|16|17...)
    | 0 -- open
    | 1 -- write
    | 2 -- close
    | 3 -- special
    | 4 -- late_special
    | 7 -- save_pos
    | 8 -- late_lua
    | 9 -- user_defined
    | 16 -- pdf_literal
    | 17 -- pdf_late_literal
    | 18 -- pdf_refobj
    | 19 -- pdf_annot
    | 20 -- pdf_start_link
    | 21 -- pdf_end_link
    | 22 -- pdf_dest
    | 23 -- pdf_action
    | 24 -- pdf_thread
    | 25 -- pdf_start_thread
    | 26 -- pdf_end_thread
    | 27 -- pdf_thread_data
    | 28 -- pdf_link_data
    | 29 -- pdf_colorstack
    | 30 -- pdf_setmatrix
    | 31 -- pdf_save
    | 32 -- pdf_restore
    | 33 -- pdf_link_state

Reference:

• Corresponding C source code: texnodes.c#L956-1006

😱 Types incomplete or incorrect? 🙏 Please contribute!