Theory Printer_SML

(******************************************************************************
 * A Meta-Model for the Isabelle API
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 *               2013-2017 IRT SystemX, France
 *               2011-2015 Achim D. Brucker, Germany
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 *               2016-2017 Nanyang Technological University, Singapore
 *               2017-2018 Virginia Tech, USA
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section‹Instantiating the Printer for SML›

theory  Printer_SML
imports Meta_SML
        Printer_init
begin

context Print
begin

definition "of_semi__val_fun = (λ Sval ⇒ ‹val›
                                | Sfun ⇒ ‹fun›)"

fun of_semi__term' where ‹of_semi__term' e = (λ
    SML_string s ⇒ ‹"%s"› (To_string (escape_sml s))
  | SML_rewrite val_fun e1 symb e2 ⇒ ‹%s %s %s %s› (of_semi__val_fun val_fun) (of_semi__term' e1) (To_string symb) (of_semi__term' e2)
  | SML_basic l ⇒ ‹%s› (String_concat ‹ › (L.map To_string l))
  | SML_binop e1 s e2 ⇒ ‹%s %s %s› (of_semi__term' e1) (of_semi__term' (SML_basic [s])) (of_semi__term' e2)
  | SML_annot e s ⇒ ‹(%s:%s)› (of_semi__term' e) (To_string s)
  | SML_function l ⇒ ‹(fn %s)› (String_concat ‹
    | › (List.map (λ (s1, s2) ⇒ ‹%s => %s› (of_semi__term' s1) (of_semi__term' s2)) l))
  | SML_apply e l ⇒ ‹(%s %s)› (of_semi__term' e) (String_concat ‹ › (List.map (λ e ⇒ ‹(%s)› (of_semi__term' e)) l))
  | SML_paren p_left p_right e ⇒ ‹%s%s%s› (To_string p_left) (of_semi__term' e) (To_string p_right)
  | SML_let_open s e ⇒ ‹let open %s in %s end› (To_string s) (of_semi__term' e)) e›

end

lemmas [code] =
  ― ‹def›
  Print.of_semi__val_fun_def
  ― ‹fun›
  Print.of_semi__term'.simps

end