author | wenzelm |
Mon, 25 May 2020 20:52:55 +0200 | |
changeset 71890 | 3b35b0fd7fe8 |
parent 71888 | feb37a43ace6 |
child 71891 | 1b023a4498c3 |
permissions | -rw-r--r-- |
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(* Title: Pure/System/scala_compiler.ML |
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Author: Makarius |
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Scala compiler operations. |
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*) |
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signature SCALA_COMPILER = |
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sig |
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val toplevel: string -> unit |
71890
3b35b0fd7fe8
clarified static_check: avoid accidental evaluation;
wenzelm
parents:
71888
diff
changeset
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val static_check: string -> unit |
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end; |
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structure Scala_Compiler: SCALA_COMPILER = |
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struct |
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(* check declaration *) |
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fun toplevel source = |
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let val errors = |
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\<^scala>\<open>scala_toplevel\<close> source |
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|> YXML.parse_body |
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|> let open XML.Decode in list string end |
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in if null errors then () else error (cat_lines errors) end; |
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71890
3b35b0fd7fe8
clarified static_check: avoid accidental evaluation;
wenzelm
parents:
71888
diff
changeset
|
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fun static_check source = |
3b35b0fd7fe8
clarified static_check: avoid accidental evaluation;
wenzelm
parents:
71888
diff
changeset
|
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toplevel ("package test\nclass __Dummy__ { __dummy__ => " ^ source ^ " }"); |
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(* antiquotations *) |
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local |
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fun make_list bg en = space_implode "," #> enclose bg en; |
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fun print_args [] = "" |
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| print_args xs = make_list "(" ")" xs; |
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fun print_types [] = "" |
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| print_types Ts = make_list "[" "]" Ts; |
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fun print_class (c, Ts) = c ^ print_types Ts; |
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val types = |
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Scan.optional (Parse.$$$ "[" |-- Parse.list1 Parse.name --| Parse.$$$ "]") []; |
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val in_class = |
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Parse.$$$ "(" |-- Parse.!!! (Parse.$$$ "in" |-- Parse.name -- types --| Parse.$$$ ")"); |
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val arguments = |
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(Parse.nat >> (fn n => replicate n "_") || |
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Parse.list (Parse.underscore || Parse.name >> (fn T => "_ : " ^ T))) >> print_args |
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|| Scan.succeed " _"; |
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val method_arguments = Scan.optional (Parse.$$$ "(" |-- arguments --| Parse.$$$ ")") " _"; |
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in |
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val _ = |
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Theory.setup |
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(Thy_Output.antiquotation_verbatim_embedded \<^binding>\<open>scala_type\<close> |
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(Scan.lift (Parse.embedded -- (types >> print_types))) |
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(fn _ => fn (t, type_args) => |
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71890
3b35b0fd7fe8
clarified static_check: avoid accidental evaluation;
wenzelm
parents:
71888
diff
changeset
|
63 |
(static_check ("type _Test_" ^ type_args ^ " = " ^ t ^ type_args); t ^ type_args)) #> |
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Thy_Output.antiquotation_verbatim_embedded \<^binding>\<open>scala_object\<close> |
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(Scan.lift Parse.embedded) |
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71890
3b35b0fd7fe8
clarified static_check: avoid accidental evaluation;
wenzelm
parents:
71888
diff
changeset
|
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(fn _ => fn object => (static_check ("val _test_ = " ^ object); object)) #> |
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Thy_Output.antiquotation_verbatim_embedded \<^binding>\<open>scala_method\<close> |
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(Scan.lift (Scan.option in_class -- Parse.embedded -- types -- method_arguments)) |
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(fn _ => fn (((class, method), method_types), method_args) => |
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let |
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val class_types = (case class of SOME (_, Ts) => Ts | NONE => []); |
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val def = "def _test_" ^ print_types (merge (op =) (method_types, class_types)); |
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val def_context = |
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(case class of |
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NONE => def ^ " = " |
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| SOME c => def ^ "(_this_ : " ^ print_class c ^ ") = _this_."); |
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val source = def_context ^ method ^ method_args; |
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71890
3b35b0fd7fe8
clarified static_check: avoid accidental evaluation;
wenzelm
parents:
71888
diff
changeset
|
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val _ = static_check source; |
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in (case class of NONE => method | SOME c => print_class c ^ "." ^ method) end)); |
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end; |
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end; |