>>I'd like to define [many] infix operators

>I came up with a totally rubbish solution to this: define an "infix-ising"
>operator like so which lets you use "long" operator names made of plain
>characters:
>
>  let (%) a b = b a
>
>  let add a b = a + b
>  let addf a b = a +. b
>
>  5 %add 6
>  10. %addf 12.


I sometimes use it as a "pipe" operator :

let (|>) x f = f x
let () = input_line stdin |> lexer |> parser' |> computation |> pretty_print

instead of

let input = input_line stdin in
let temp = lexer input in
let temp = parser' temp in
let temp = computation temp in
pretty_print temp;;

-- 
Jean-Baptiste Rouquier

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