Scanf question

["Sasha Rush" <rush@fas.harvard.edu>]

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Hi all,

I'm curious about the asymmetry between printf and scanf.

I like the modularity I can get by user defined printers, i.e.

module Foo =
struct
    type t = int
    let print ppf =  fprintf "%d"
end

printf "My %a" Foo.print some_foo

But how do I get the same abstraction with scanf?

let id a = a
module Foo =
struct
   type t = int
   let read buf = bscanf "%d" id
end

(*Seemed natural*)
let some_foo = bscanf "My %a" Foo.read id


Thanks,
/Sasha

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