js_pass_flatten.mli

(* Copyright (C) 2015-2016 Bloomberg Finance L.P.
 * Copyright (C) 2017 - Hongbo Zhang, Authors of ReScript 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
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 * LGPL version 3 (or the corresponding section of a later version of the LGPL
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(** A pass converting nested js statement into a flatten visual appearance 

    Note this module is used to convert some nested expressions to flat statements, 
    in general, it's more human readable, and since it generate flat statements, we can spot
    some inline opportunities for the produced statemetns, 
    (inline) expressions inside a nested expression would generate ugly code.

    Since we are aiming to flatten expressions, we should avoid some smart constructors in {!Js_helper}, 
    it  tries to spit out expression istead of statements if it can
*)

val program : J.program -> J.program