(*  Title:      Pure/ML/ml_antiquote.ML

     ID:         $Id$

     Author:     Makarius

 Common ML antiquotations.

 *)

 signature ML_ANTIQUOTE =

 sig

   val macro: string ->

     (Context.generic * Args.T list -> Proof.context * (Context.generic * Args.T list)) -> unit

   val variant: string -> Proof.context -> string * Proof.context

   val inline: string ->

     (Context.generic * Args.T list -> string * (Context.generic * Args.T list)) -> unit

   val declaration: string -> string ->

     (Context.generic * Args.T list -> string * (Context.generic * Args.T list)) -> unit

   val value: string ->

     (Context.generic * Args.T list -> string * (Context.generic * Args.T list)) -> unit

 end;

 structure ML_Antiquote: ML_ANTIQUOTE =

 struct

 (** generic tools **)

 (* ML names *)

 structure NamesData = ProofDataFun

 (

   type T = Name.context;

   fun init _ = ML_Syntax.reserved;

 );

 fun variant a ctxt =

   let

     val names = NamesData.get ctxt;

     val ([b], names') = Name.variants [a] names;

     val ctxt' = NamesData.put names' ctxt;

   in (b, ctxt') end;

 (* specific antiquotations *)

 fun macro name scan = ML_Context.add_antiq name

   (scan :|-- (fn ctxt => Scan.depend (fn _ => Scan.succeed

     (Context.Proof ctxt, fn {background, ...} => (K ("", ""), background)))));

 fun inline name scan = ML_Context.add_antiq name

   (scan >> (fn s => fn {struct_name, background} => (K ("", s), background)));

 fun declaration kind name scan = ML_Context.add_antiq name

   (scan >> (fn s => fn {struct_name, background} =>

     let

       val (a, background') = variant name background;

       val env = kind ^ " " ^ a ^ " = " ^ s ^ ";\n";

       val body = struct_name ^ "." ^ a;

     in (K (env, body), background') end));

 val value = declaration "val";

 (** concrete antiquotations **)

 structure P = OuterParse;

 (* misc *)

 val _ = value "theory"

   (Scan.lift Args.name >> (fn name => "ThyInfo.get_theory " ^ ML_Syntax.print_string name)

   || Scan.succeed "ML_Context.the_global_context ()");

 val _ = value "theory_ref"

   (Scan.lift Args.name >> (fn name =>

     "Theory.check_thy (ThyInfo.theory " ^ ML_Syntax.print_string name ^ ")")

   || Scan.succeed "Theory.check_thy (ML_Context.the_global_context ())");

 val _ = value "context" (Scan.succeed "ML_Context.the_local_context ()");

 val _ = inline "sort" (Args.context -- Scan.lift Args.name >> (fn (ctxt, s) =>

   ML_Syntax.atomic (ML_Syntax.print_sort (Syntax.read_sort ctxt s))));

 val _ = inline "typ" (Args.typ >> (ML_Syntax.atomic o ML_Syntax.print_typ));

 val _ = inline "term" (Args.term >> (ML_Syntax.atomic o ML_Syntax.print_term));

 val _ = inline "prop" (Args.prop >> (ML_Syntax.atomic o ML_Syntax.print_term));

 val _ = macro "let" (Args.context --

   Scan.lift (P.and_list1 (P.and_list1 Args.name -- (Args.$$$ "=" |-- Args.name)))

     >> (fn (ctxt, args) => #2 (ProofContext.match_bind true args ctxt)));

 val _ = macro "note" (Args.context :|-- (fn ctxt =>

   P.and_list1' (Scan.lift (Args.opt_thm_name I "=") -- Attrib.thms >> (fn ((a, srcs), ths) =>

     ((a, map (Attrib.attribute (ProofContext.theory_of ctxt)) srcs), [(ths, [])])))

   >> (fn args => #2 (ProofContext.note_thmss_i "" args ctxt))));

 val _ = value "ctyp" (Args.typ >> (fn T =>

   "Thm.ctyp_of (ML_Context.the_global_context ()) " ^ ML_Syntax.atomic (ML_Syntax.print_typ T)));

 val _ = value "cterm" (Args.term >> (fn t =>

   "Thm.cterm_of (ML_Context.the_global_context ()) " ^ ML_Syntax.atomic (ML_Syntax.print_term t)));

 val _ = value "cprop" (Args.prop >> (fn t =>

   "Thm.cterm_of (ML_Context.the_global_context ()) " ^ ML_Syntax.atomic (ML_Syntax.print_term t)));

 val _ = value "cpat"

   (Args.context -- Scan.lift Args.name >> uncurry ProofContext.read_term_pattern >> (fn t =>

     "Thm.cterm_of (ML_Context.the_global_context ()) " ^ ML_Syntax.atomic (ML_Syntax.print_term t)));

 fun type_ syn = (Args.context -- Scan.lift Args.name >> (fn (ctxt, c) =>

     #1 (Term.dest_Type (ProofContext.read_tyname ctxt c))

     |> syn ? Sign.base_name

     |> ML_Syntax.print_string));

 val _ = inline "type_name" (type_ false);

 val _ = inline "type_syntax" (type_ true);

 fun const syn = Args.context -- Scan.lift Args.name >> (fn (ctxt, c) =>

   #1 (Term.dest_Const (ProofContext.read_const_proper ctxt c))

   |> syn ? ProofContext.const_syntax_name ctxt

   |> ML_Syntax.print_string);

 val _ = inline "const_name" (const false);

 val _ = inline "const_syntax" (const true);

 val _ = inline "const"

   (Args.context -- Scan.lift Args.name -- Scan.optional

       (Scan.lift (Args.$$$ "(") |-- OuterParse.enum1' "," Args.typ --| Scan.lift (Args.$$$ ")")) []

     >> (fn ((ctxt, c), Ts) =>

       let val (c, _) = Term.dest_Const (ProofContext.read_const_proper ctxt c)

       in ML_Syntax.atomic (ML_Syntax.print_term (ProofContext.mk_const ctxt (c, Ts))) end));

 end;