Hello,

I'm building an outline of an ocaml source file (interface or 
implementation) with
the abstract syntax tree generated by the -dparsetree compiler option.

This abstract syntax tree is printed via the 
/ocaml/release/3.11.2/parsing/printast.ml
module. During my cover tests, I didn't managed to obtain these AST 
elements :
    - Pcf_let : a let construction as a class field ?
    - Pexp_letmodule : ?
    - Pexp_override : an override expression ?
    - Ppat_type : a type pattern matching ?
    - Rinherit : an inherit row field ?

Are these constructions obsolete ? If not, which code could generate 
these AST elements ?

Thanks,

Emmanuel