如何在ocaml中调用模块

Question

I have wrote a ocaml file which includes Vector module and Matrix module, and I want to invoke Vector module in the Matrix module, but the compiler said that Vector module is unbound module. I don't know why,here is my code

module Vector = 
Struct
   body
end

module Matrix = 
Struct
    body
end

they are in the same .ml file, how can I write code in Matrix module to invoke Vector module(exclude using functor)

Answer 1

There's nothing wrong with the code you show, so it's not really possible to answer. Here is a tiny example that works ( m.ml ):

module Vector =
struct
    let f x = x + 7
end

module Matrix =
struct
    let g x = 2 * Vector.f x
end

The compiler has no trouble with it:

$ ocamlc -c m.ml
$ 

One thing to be aware of is that every OCaml file introduces a module named after the file. So the modules in the above example are named M.Vector and M.Matrix , because the file is named m.ml .

If this doesn't help, you'll need to show more code. Ideally, you should show the smallest amount of code that reproduces the problem.