how to access a type defined in one .ml file in another .ml file
- by user339261
Hi,
I m very new to ocaml and i m facing the problem below,
In a.ml a record type t is defined and is also defined transparently
in a.mli, i.e. in d interface so that the type definition is available
to all other files.
a.ml also has a function, func, which returns a list of t.
Now in another file, b.ml i m calling func, now obviously ocaml
compiler wud nt be able to infer d type of objects stored in d list,
for compiler its just a list. so in b.ml, i hav something like dis,
let tlist = A.func in
let vart = List.hd tlist in
printf "%s\n" vart.name (name is a field in record t)
Now here i get a compiler error sayin "Unbound record field label
name" which makes sense as compiler can't infer d type of vart.
my first question: how do I explicitly provide d type of vart as t
here?
i tried doing "let vart:A.t = " but got the
same error.
I also tried creating another function to fetch the first element of d
list and mentioning return type as A.t, but then i got the "Unbound
value A.t". I did this:
let firstt = function
[] - 0
| x :: _ - A.t x ;;
The problem is compiler is unable to recognize A.t (a type) in b.ml
but is able to recognize function A.func. If I remove A.t from the
b.ml, i don'get any compiler errors.
Please help, its urgent work.
Thanks in advance!
~Tarun
