Theory Generator_static

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text‹We present two solutions for obtaining an Isabelle file.›

section‹Static Meta Embedding with Exportation›

theory  Generator_static
imports Printer "../../Antiquote_Setup"
begin
(*<*)
declare[[cartouche_type' = "abr_string"]]
(*>*)

text ‹In the ``static'' solution: the user manually generates
the Isabelle file after writing by hand a Toy input to translate.
The input is not written with the syntax of the Toy Language,
but with raw Isabelle constructors.›

subsection‹Giving an Input to Translate›

definition "Design =
 (let n = λn1 n2. ToyTyObj (ToyTyCore_pre n1) (case n2 of None ⇒ [] | Some n2 ⇒ [[ToyTyCore_pre n2]])
    ; mk = λn l. toy_class_raw.make n l [] False in
  [ mk (n ‹Galaxy› None) [(‹sound›, ToyTy_raw ‹unit›), (‹moving›, ToyTy_raw ‹bool›)]
  , mk (n ‹Planet› (Some ‹Galaxy›)) [(‹weight›, ToyTy_raw ‹nat›)]
  , mk (n ‹Person› (Some ‹Planet›)) [(‹salary›, ToyTy_raw ‹int›)] ])"

text ‹Since we are in a Isabelle session, at this time, it becomes possible to inspect with
the command @{command value} the result of the translations applied with @{term Design}.
A suitable environment should nevertheless be provided,
one can typically experiment this by copying-pasting the following environment
initialized in the above ‹main›:›

definition "main =
 (let n = λn1. ToyTyObj (ToyTyCore_pre n1) []
    ; ToyMult = λm r. toy_multiplicity.make [m] r [Set] in
  write_file
   (compiler_env_config.extend
     (compiler_env_config_empty True None (oidInit (Oid 0)) Gen_only_design (None, False)
        ⦇ D_output_disable_thy := False
        , D_output_header_thy := Some (‹Design_generated›
                                      ,[‹../Toy_Library›]
                                      ,‹../embedding/Generator_dynamic_sequential›) ⦈)
     ( L.map (META_class_raw Floor1) Design
       @@@@ [ META_association (toy_association.make
                                  ToyAssTy_association
                                  (ToyAssRel [ (n ‹Person›, ToyMult (Mult_star, None) None)
                                             , (n ‹Person›, ToyMult (Mult_nat 0, Some (Mult_nat 1)) (Some ‹boss›))]))
          , META_flush_all ToyFlushAll]
     , None)))"

subsection‹Statically Executing the Exportation›

text‹
@{verbatim "apply_code_printing ()"} \\
@{verbatim "export_code main"} \\
@{verbatim "  (* in Haskell *)"} \\
@{verbatim "  (* in OCaml module_name M *)"} \\
@{verbatim "  (* in Scala module_name M *)"} \\
@{verbatim "  (* in SML   module_name M *)"}
›

text‹After the exportation and executing the exported, we obtain an Isabelle \verb|.thy| file
containing the generated code associated to the above input.›

end