src/Pure/Isar/proof_context.ML
author wenzelm
Tue May 31 11:53:38 2005 +0200 (2005-05-31 ago)
changeset 16147 59177d5bcb6f
parent 16031 fbf3471214d6
child 16348 7504fe04170f
permissions -rw-r--r--
renamed cond_extern to extern;
support general naming context;
added qualified_names, no_base_names, custom_accesses, restore_naming;
removed qualified, restore_qualified;
add_cases: RuleCases.T option;
put_thms etc.: back to simple form, use naming context for extended functionality;
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(*  Title:      Pure/Isar/proof_context.ML
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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The key concept of Isar proof contexts.
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*)
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val show_structs = ref false;
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signature PROOF_CONTEXT =
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sig
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  type context
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  type exporter
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  exception CONTEXT of string * context
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  val theory_of: context -> theory
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  val sign_of: context -> Sign.sg
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  val is_fixed: context -> string -> bool
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  val is_known: context -> string -> bool
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  val fixed_names_of: context -> string list
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  val assumptions_of: context -> (cterm list * exporter) list
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  val prems_of: context -> thm list
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  val fact_index_of: context -> FactIndex.T
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  val print_proof_data: theory -> unit
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  val init: theory -> context
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  val pretty_term: context -> term -> Pretty.T
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  val pretty_typ: context -> typ -> Pretty.T
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  val pretty_sort: context -> sort -> Pretty.T
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  val pp: context -> Pretty.pp
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  val pretty_thm: context -> thm -> Pretty.T
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  val pretty_thms: context -> thm list -> Pretty.T
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  val pretty_fact: context -> string * thm list -> Pretty.T
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  val string_of_term: context -> term -> string
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  val default_type: context -> string -> typ option
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  val used_types: context -> string list
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  val read_typ: context -> string -> typ
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  val read_typ_raw: context -> string -> typ
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  val cert_typ: context -> typ -> typ
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  val cert_typ_raw: context -> typ -> typ
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  val get_skolem: context -> string -> string
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  val extern_skolem: context -> term -> term
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  val read_termTs: context -> (string -> bool) -> (indexname -> typ option)
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    -> (indexname -> sort option) -> string list -> (string * typ) list
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    -> term list * (indexname * typ) list
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  val read_termTs_schematic: context -> (string -> bool) -> (indexname -> typ option)
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    -> (indexname -> sort option) -> string list -> (string * typ) list
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    -> term list * (indexname * typ) list
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  val read_term_liberal: context -> string -> term
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  val read_term: context -> string -> term
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  val read_prop: context -> string -> term
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  val read_prop_schematic: context -> string -> term
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  val read_terms: context -> string list -> term list
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  val read_term_pats: typ -> context -> string list -> term list
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  val read_prop_pats: context -> string list -> term list
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  val cert_term: context -> term -> term
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  val cert_prop: context -> term -> term
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  val cert_term_pats: typ -> context -> term list -> term list
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  val cert_prop_pats: context -> term list -> term list
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  val declare_term: term -> context -> context
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  val read_tyname: context -> string -> typ
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  val read_const: context -> string -> term
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  val warn_extra_tfrees: context -> context -> context
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  val generalize: context -> context -> term list -> term list
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  val find_free: term -> string -> term option
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  val export: bool -> context -> context -> thm -> thm Seq.seq
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  val export_standard: cterm list -> context -> context -> thm -> thm
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  val export_plain: cterm list -> context -> context -> thm -> thm
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  val drop_schematic: indexname * term option -> indexname * term option
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  val add_binds: (indexname * string option) list -> context -> context
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  val add_binds_i: (indexname * term option) list -> context -> context
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  val auto_bind_goal: term list -> context -> context
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  val auto_bind_facts: term list -> context -> context
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  val match_bind: bool -> (string list * string) list -> context -> context
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  val match_bind_i: bool -> (term list * term) list -> context -> context
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  val read_propp: context * (string * (string list * string list)) list list
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    -> context * (term * (term list * term list)) list list
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  val cert_propp: context * (term * (term list * term list)) list list
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    -> context * (term * (term list * term list)) list list
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  val read_propp_schematic: context * (string * (string list * string list)) list list
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    -> context * (term * (term list * term list)) list list
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  val cert_propp_schematic: context * (term * (term list * term list)) list list
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    -> context * (term * (term list * term list)) list list
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  val bind_propp: context * (string * (string list * string list)) list list
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    -> context * (term list list * (context -> context))
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  val bind_propp_i: context * (term * (term list * term list)) list list
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    -> context * (term list list * (context -> context))
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  val bind_propp_schematic: context * (string * (string list * string list)) list list
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    -> context * (term list list * (context -> context))
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  val bind_propp_schematic_i: context * (term * (term list * term list)) list list
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    -> context * (term list list * (context -> context))
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  val get_thm: context -> thmref -> thm
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  val get_thm_closure: context -> thmref -> thm
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  val get_thms: context -> thmref -> thm list
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  val get_thms_closure: context -> thmref -> thm list
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  val valid_thms: context -> string * thm list -> bool
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  val lthms_containing: context -> FactIndex.spec -> (string * thm list) list
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  val extern: context -> string -> xstring
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  val qualified_names: context -> context
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  val no_base_names: context -> context
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  val custom_accesses: (string list -> string list list) -> context -> context
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  val restore_naming: context -> context -> context
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  val hide_thms: bool -> string list -> context -> context
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  val put_thm: string * thm -> context -> context
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  val put_thms: string * thm list -> context -> context
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  val put_thmss: (string * thm list) list -> context -> context
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  val reset_thms: string -> context -> context
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  val note_thmss:
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    ((bstring * context attribute list) * (thmref * context attribute list) list) list ->
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      context -> context * (bstring * thm list) list
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  val note_thmss_i:
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    ((bstring * context attribute list) * (thm list * context attribute list) list) list ->
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      context -> context * (bstring * thm list) list
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  val export_assume: exporter
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  val export_presume: exporter
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  val cert_def: context -> term -> string * term
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  val export_def: exporter
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  val assume: exporter
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    -> ((string * context attribute list) * (string * (string list * string list)) list) list
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    -> context -> context * (bstring * thm list) list
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  val assume_i: exporter
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    -> ((string * context attribute list) * (term * (term list * term list)) list) list
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    -> context -> context * (bstring * thm list) list
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  val read_vars: context * (string list * string option)
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    -> context * (string list * typ option)
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  val cert_vars: context * (string list * typ option)
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    -> context * (string list * typ option)
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  val read_vars_liberal: context * (string list * string option)
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    -> context * (string list * typ option)
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  val cert_vars_liberal: context * (string list * typ option)
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    -> context * (string list * typ option)
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  val fix: (string list * string option) list -> context -> context
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  val fix_i: (string list * typ option) list -> context -> context
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  val add_fixes: (string * typ option * Syntax.mixfix option) list -> context -> context
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  val add_fixes_liberal: (string * typ option * Syntax.mixfix option) list -> context -> context
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  val fix_frees: term list -> context -> context
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  val bind_skolem: context -> string list -> term -> term
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  val apply_case: RuleCases.T -> context
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    -> context * ((indexname * term option) list * (string * term list) list)
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  val get_case: context -> string -> string option list -> RuleCases.T
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  val add_cases: (string * RuleCases.T option) list -> context -> context
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  val verbose: bool ref
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  val setmp_verbose: ('a -> 'b) -> 'a -> 'b
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  val print_syntax: context -> unit
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  val print_binds: context -> unit
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  val print_lthms: context -> unit
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  val print_cases: context -> unit
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  val prems_limit: int ref
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  val pretty_asms: context -> Pretty.T list
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  val pretty_context: context -> Pretty.T list
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end;
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signature PRIVATE_PROOF_CONTEXT =
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sig
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  include PROOF_CONTEXT
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  val init_data: Object.kind -> (theory -> Object.T) * (context -> Object.T -> unit)
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    -> theory -> theory
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  val print_data: Object.kind -> context -> unit
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  val get_data: Object.kind -> (Object.T -> 'a) -> context -> 'a
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  val put_data: Object.kind -> ('a -> Object.T) -> 'a -> context -> context
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end;
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structure ProofContext: PRIVATE_PROOF_CONTEXT =
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struct
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(** datatype context **)
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type exporter = bool -> cterm list -> thm -> thm Seq.seq;
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datatype context =
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  Context of
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   {thy: theory,                                              (*current theory*)
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    syntax: Syntax.syntax * string list * string list,        (*syntax with structs and mixfixed*)
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    data: Object.T Symtab.table,                              (*user data*)
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    asms:
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      ((cterm list * exporter) list *                         (*assumes: A ==> _*)
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        (string * thm list) list) *                           (*prems: A |- A *)
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      (string * string) list,                                 (*fixes: !!x. _*)
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    binds: (term * typ) Vartab.table,                         (*term bindings*)
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    thms: NameSpace.naming * NameSpace.T *
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      thm list Symtab.table * FactIndex.T,                    (*local thms*)
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    cases: (string * RuleCases.T) list,                       (*local contexts*)
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    defs:
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      typ Vartab.table *                                      (*type constraints*)
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      sort Vartab.table *                                     (*default sorts*)
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      string list *                                           (*used type variables*)
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      term list Symtab.table};                                (*type variable occurrences*)
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exception CONTEXT of string * context;
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fun make_context (thy, syntax, data, asms, binds, thms, cases, defs) =
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  Context {thy = thy, syntax = syntax, data = data, asms = asms, binds = binds,
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    thms = thms, cases = cases, defs = defs};
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fun map_context f (Context {thy, syntax, data, asms, binds, thms, cases, defs}) =
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  make_context (f (thy, syntax, data, asms, binds, thms, cases, defs));
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fun theory_of (Context {thy, ...}) = thy;
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val sign_of = Theory.sign_of o theory_of;
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fun syntax_of (Context {syntax, ...}) = syntax;
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fun fixes_of (Context {asms = (_, fixes), ...}) = fixes;
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val fixed_names_of = map #2 o fixes_of;
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fun is_fixed ctxt x = exists (equal x o #2) (fixes_of ctxt);
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fun is_known (ctxt as Context {defs = (types, _, _, _), ...}) x =
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  is_some (Vartab.lookup (types, (x, ~1))) orelse is_fixed ctxt x;
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fun type_occs (Context {defs = (_, _, _, tab), ...}) = tab;
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fun assumptions_of (Context {asms = ((asms, _), _), ...}) = asms;
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fun prems_of (Context {asms = ((_, prems), _), ...}) = List.concat (map #2 prems);
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fun fact_index_of (Context {thms = (_, _, _, idx), ...}) = idx;
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(** user data **)
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(* errors *)
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fun of_theory thy = "\nof theory " ^ Sign.str_of_sg (Theory.sign_of thy);
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fun err_inconsistent kinds =
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  error ("Attempt to merge different versions of " ^ commas_quote kinds ^ " proof data");
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fun err_dup_init thy kind =
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  error ("Duplicate initialization of " ^ quote kind ^ " proof data" ^ of_theory thy);
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fun err_undef ctxt kind =
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  raise CONTEXT ("Tried to access undefined " ^ quote kind ^ " proof data", ctxt);
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fun err_uninit ctxt kind =
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  raise CONTEXT ("Tried to access uninitialized " ^ quote kind ^ " proof data" ^
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    of_theory (theory_of ctxt), ctxt);
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fun err_access ctxt kind =
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  raise CONTEXT ("Unauthorized access to " ^ quote kind ^ " proof data" ^
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    of_theory (theory_of ctxt), ctxt);
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(* data kind 'Isar/proof_data' *)
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structure ProofDataDataArgs =
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struct
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  val name = "Isar/proof_data";
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  type T = (Object.kind * ((theory -> Object.T) * (context -> Object.T -> unit))) Symtab.table;
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  val empty = Symtab.empty;
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  val copy = I;
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  val prep_ext = I;
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  fun merge tabs = Symtab.merge (Object.eq_kind o pairself fst) tabs
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    handle Symtab.DUPS kinds => err_inconsistent kinds;
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  fun print _ tab = Pretty.writeln (Pretty.strs (map #1 (Symtab.dest tab)));
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end;
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structure ProofDataData = TheoryDataFun(ProofDataDataArgs);
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val _ = Context.add_setup [ProofDataData.init];
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val print_proof_data = ProofDataData.print;
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(* init proof data *)
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fun init_data kind meths thy =
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  let
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    val name = Object.name_of_kind kind;
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    val tab = Symtab.update_new ((name, (kind, meths)), ProofDataData.get thy)
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      handle Symtab.DUP _ => err_dup_init thy name;
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  in thy |> ProofDataData.put tab end;
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(* access data *)
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fun lookup_data (ctxt as Context {data, ...}) kind =
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  let
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    val thy = theory_of ctxt;
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    val name = Object.name_of_kind kind;
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  in
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    (case Symtab.lookup (ProofDataData.get thy, name) of
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      SOME (k, meths) =>
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        if Object.eq_kind (kind, k) then
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          (case Symtab.lookup (data, name) of
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            SOME x => (x, meths)
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          | NONE => err_undef ctxt name)
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        else err_access ctxt name
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    | NONE => err_uninit ctxt name)
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  end;
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fun get_data kind f ctxt =
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  let val (x, _) = lookup_data ctxt kind
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  in f x handle Match => Object.kind_error kind end;
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fun print_data kind ctxt =
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  let val (x, (_, prt)) = lookup_data ctxt kind
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  in prt ctxt x end;
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fun put_data kind f x ctxt =
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 (lookup_data ctxt kind;
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  map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
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    (thy, syntax, Symtab.update ((Object.name_of_kind kind, f x), data),
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      asms, binds, thms, cases, defs)) ctxt);
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(* init context *)
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fun init thy =
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  let val data = Symtab.map (fn (_, (f, _)) => f thy) (ProofDataData.get thy) in
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    make_context (thy, (Theory.syn_of thy, [], []), data, (([], []), []), Vartab.empty,
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      (NameSpace.default_naming, NameSpace.empty, Symtab.empty, FactIndex.empty), [],
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      (Vartab.empty, Vartab.empty, [], Symtab.empty))
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  end;
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wenzelm@5819
   310
wenzelm@8096
   311
wenzelm@12093
   312
(** local syntax **)
wenzelm@12093
   313
wenzelm@12093
   314
val fixedN = "\\<^fixed>";
wenzelm@12093
   315
val structN = "\\<^struct>";
wenzelm@12093
   316
wenzelm@12100
   317
wenzelm@14697
   318
(* translation functions *)
wenzelm@14665
   319
wenzelm@14665
   320
fun fixed_tr x = (fixedN ^ x, curry Term.list_comb (Syntax.free x));
wenzelm@14665
   321
wenzelm@12100
   322
fun context_tr' ctxt =
wenzelm@12100
   323
  let
wenzelm@12100
   324
    val (_, structs, mixfixed) = syntax_of ctxt;
wenzelm@12100
   325
wenzelm@12100
   326
    fun tr' (t $ u) = tr' t $ tr' u
wenzelm@12100
   327
      | tr' (Abs (x, T, t)) = Abs (x, T, tr' t)
wenzelm@12100
   328
      | tr' (t as Free (x, T)) =
wenzelm@14697
   329
          let val i = Library.find_index_eq x structs + 1 in
wenzelm@14697
   330
            if i = 0 andalso x mem_string mixfixed then Const (fixedN ^ x, T)
wenzelm@14707
   331
            else if i = 1 andalso not (! show_structs) then
wenzelm@14707
   332
              Syntax.const "_struct" $ Syntax.const "_indexdefault"
wenzelm@12100
   333
            else t
wenzelm@12100
   334
          end
wenzelm@12100
   335
      | tr' a = a;
wenzelm@12100
   336
  in tr' end;
wenzelm@12100
   337
wenzelm@12100
   338
wenzelm@12576
   339
(* add syntax *)
wenzelm@12576
   340
wenzelm@12576
   341
fun mixfix_type mx = replicate (Syntax.mixfix_args mx) TypeInfer.logicT ---> TypeInfer.logicT;
wenzelm@12093
   342
wenzelm@12093
   343
local
wenzelm@12093
   344
skalberg@15531
   345
fun mixfix x NONE mx = (fixedN ^ x, mixfix_type mx, Syntax.fix_mixfix x mx)
skalberg@15531
   346
  | mixfix x (SOME T) mx = (fixedN ^ x, T, Syntax.fix_mixfix x mx);
wenzelm@12093
   347
skalberg@15531
   348
fun prep_mixfix (_, _, NONE) = NONE
skalberg@15531
   349
  | prep_mixfix (x, opt_T, SOME mx) = SOME (mixfix x opt_T mx);
wenzelm@12093
   350
skalberg@15531
   351
fun prep_mixfix' (_, _, NONE) = NONE
skalberg@15531
   352
  | prep_mixfix' (x, _, SOME Syntax.NoSyn) = NONE
skalberg@15531
   353
  | prep_mixfix' (x, opt_T, _) = SOME (x, mixfix x opt_T (Syntax.literal x));
wenzelm@12093
   354
skalberg@15531
   355
fun prep_struct (x, _, NONE) = SOME x
skalberg@15531
   356
  | prep_struct _ = NONE;
wenzelm@12093
   357
wenzelm@15750
   358
fun mk trs = map Syntax.mk_trfun trs;
wenzelm@15750
   359
wenzelm@12093
   360
in
wenzelm@12093
   361
wenzelm@12093
   362
fun add_syntax decls =
ballarin@15735
   363
  map_context (fn (thy, (syn, structs, mixfixed), data, asms, binds, thms, cases, defs) =>
wenzelm@12093
   364
    let
wenzelm@14901
   365
      val is_logtype = Sign.is_logtype (Theory.sign_of thy);
skalberg@15570
   366
      val structs' = structs @ List.mapPartial prep_struct decls;
skalberg@15570
   367
      val mxs = List.mapPartial prep_mixfix decls;
skalberg@15570
   368
      val (fixed, mxs_output) = Library.split_list (List.mapPartial prep_mixfix' decls);
wenzelm@12093
   369
      val trs = map fixed_tr fixed;
wenzelm@12093
   370
      val syn' = syn
wenzelm@14901
   371
        |> Syntax.extend_const_gram is_logtype ("", false) mxs_output
wenzelm@14901
   372
        |> Syntax.extend_const_gram is_logtype ("", true) mxs
wenzelm@15750
   373
        |> Syntax.extend_trfuns ([], mk trs, [], []);
wenzelm@15750
   374
    in (thy, (syn', structs', fixed @ mixfixed), data, asms, binds, thms, cases, defs) end);
wenzelm@12093
   375
wenzelm@12093
   376
fun syn_of (Context {syntax = (syn, structs, _), ...}) =
wenzelm@15750
   377
  let val (atrs, trs, trs', atrs') = Syntax.struct_trfuns structs
wenzelm@15750
   378
  in syn |> Syntax.extend_trfuns (mk atrs, mk trs, mk trs', mk atrs') end;
wenzelm@14697
   379
wenzelm@12093
   380
end;
wenzelm@12093
   381
wenzelm@12093
   382
wenzelm@12093
   383
wenzelm@14828
   384
(** pretty printing **)
wenzelm@14828
   385
wenzelm@14974
   386
fun pretty_term ctxt t = Sign.pretty_term' (syn_of ctxt) (sign_of ctxt) (context_tr' ctxt t);
wenzelm@14974
   387
fun pretty_typ ctxt T = Sign.pretty_typ (sign_of ctxt) T;
wenzelm@14974
   388
fun pretty_sort ctxt S = Sign.pretty_sort (sign_of ctxt) S;
wenzelm@14974
   389
fun pretty_classrel ctxt cs = Sign.pretty_classrel (sign_of ctxt) cs;
wenzelm@14974
   390
fun pretty_arity ctxt ar = Sign.pretty_arity (sign_of ctxt) ar;
wenzelm@14828
   391
wenzelm@14974
   392
fun pp ctxt = Pretty.pp (pretty_term ctxt, pretty_typ ctxt, pretty_sort ctxt,
wenzelm@14974
   393
  pretty_classrel ctxt, pretty_arity ctxt);
wenzelm@14828
   394
wenzelm@14828
   395
val string_of_term = Pretty.string_of oo pretty_term;
wenzelm@14828
   396
wenzelm@14828
   397
fun pretty_thm ctxt thm =
wenzelm@14828
   398
  if ! Display.show_hyps then
wenzelm@14876
   399
    Display.pretty_thm_aux (pp ctxt) false thm
wenzelm@14828
   400
  else pretty_term ctxt (Thm.prop_of thm);
wenzelm@14828
   401
wenzelm@14828
   402
fun pretty_thms ctxt [th] = pretty_thm ctxt th
wenzelm@14828
   403
  | pretty_thms ctxt ths = Pretty.blk (0, Pretty.fbreaks (map (pretty_thm ctxt) ths));
wenzelm@14828
   404
wenzelm@14828
   405
fun pretty_fact ctxt ("", ths) = pretty_thms ctxt ths
wenzelm@14828
   406
  | pretty_fact ctxt (a, [th]) =
wenzelm@14828
   407
      Pretty.block [Pretty.str (a ^ ":"), Pretty.brk 1, pretty_thm ctxt th]
wenzelm@14828
   408
  | pretty_fact ctxt (a, ths) =
wenzelm@14828
   409
      Pretty.block (Pretty.fbreaks (Pretty.str (a ^ ":") :: map (pretty_thm ctxt) ths));
wenzelm@14828
   410
wenzelm@14828
   411
wenzelm@14828
   412
wenzelm@7663
   413
(** default sorts and types **)
wenzelm@7663
   414
wenzelm@12291
   415
fun def_sort (Context {defs = (_, sorts, _, _), ...}) xi = Vartab.lookup (sorts, xi);
wenzelm@7663
   416
wenzelm@14720
   417
fun def_type (Context {binds, defs = (types, _, _, _), ...}) pattern xi =
wenzelm@7663
   418
  (case Vartab.lookup (types, xi) of
skalberg@15531
   419
    NONE =>
wenzelm@15758
   420
      if pattern then NONE
wenzelm@15758
   421
      else Vartab.lookup (binds, xi) |> Option.map (TypeInfer.polymorphicT o #2)
wenzelm@7663
   422
  | some => some);
wenzelm@7663
   423
wenzelm@12504
   424
fun default_type (Context {defs = (types, _, _, _), ...}) x = Vartab.lookup (types, (x, ~1));
wenzelm@12504
   425
fun used_types (Context {defs = (_, _, used, _), ...}) = used;
wenzelm@12414
   426
wenzelm@7663
   427
wenzelm@5819
   428
wenzelm@5819
   429
(** prepare types **)
wenzelm@5819
   430
wenzelm@9504
   431
local
wenzelm@9504
   432
wenzelm@9504
   433
fun read_typ_aux read ctxt s =
wenzelm@12093
   434
  transform_error (read (syn_of ctxt) (sign_of ctxt, def_sort ctxt)) s
wenzelm@7663
   435
    handle ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt);
wenzelm@5819
   436
wenzelm@10554
   437
fun cert_typ_aux cert ctxt raw_T =
wenzelm@10554
   438
  cert (sign_of ctxt) raw_T
wenzelm@10554
   439
    handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
wenzelm@9504
   440
wenzelm@9504
   441
in
wenzelm@9504
   442
wenzelm@14780
   443
val read_typ     = read_typ_aux Sign.read_typ';
wenzelm@14780
   444
val read_typ_raw = read_typ_aux Sign.read_typ_raw';
wenzelm@14780
   445
val cert_typ     = cert_typ_aux Sign.certify_typ;
wenzelm@14780
   446
val cert_typ_raw = cert_typ_aux Sign.certify_typ_raw;
wenzelm@9504
   447
wenzelm@9504
   448
end;
wenzelm@9504
   449
wenzelm@5819
   450
wenzelm@7679
   451
(* internalize Skolem constants *)
wenzelm@7679
   452
wenzelm@10583
   453
fun lookup_skolem ctxt x = assoc (fixes_of ctxt, x);
wenzelm@15974
   454
fun get_skolem ctxt x = if_none (lookup_skolem ctxt x) x;
wenzelm@7679
   455
wenzelm@12504
   456
fun no_skolem internal ctxt x =
wenzelm@9291
   457
  if can Syntax.dest_skolem x then
wenzelm@7679
   458
    raise CONTEXT ("Illegal reference to internal Skolem constant: " ^ quote x, ctxt)
wenzelm@12504
   459
  else if not internal andalso can Syntax.dest_internal x then
wenzelm@9291
   460
    raise CONTEXT ("Illegal reference to internal variable: " ^ quote x, ctxt)
wenzelm@7679
   461
  else x;
wenzelm@7679
   462
wenzelm@14720
   463
fun intern_skolem ctxt internal =
wenzelm@7679
   464
  let
wenzelm@7679
   465
    fun intern (t as Free (x, T)) =
wenzelm@14720
   466
          if internal x then t
wenzelm@14720
   467
          else
wenzelm@14720
   468
            (case lookup_skolem ctxt (no_skolem false ctxt x) of
skalberg@15531
   469
              SOME x' => Free (x', T)
skalberg@15531
   470
            | NONE => t)
wenzelm@7679
   471
      | intern (t $ u) = intern t $ intern u
wenzelm@7679
   472
      | intern (Abs (x, T, t)) = Abs (x, T, intern t)
wenzelm@7679
   473
      | intern a = a;
wenzelm@7679
   474
  in intern end;
wenzelm@7679
   475
wenzelm@7679
   476
wenzelm@9133
   477
(* externalize Skolem constants -- for printing purposes only *)
wenzelm@9133
   478
wenzelm@9133
   479
fun extern_skolem ctxt =
wenzelm@9133
   480
  let
wenzelm@9133
   481
    val rev_fixes = map Library.swap (fixes_of ctxt);
wenzelm@9133
   482
wenzelm@9133
   483
    fun extern (t as Free (x, T)) =
wenzelm@9133
   484
          (case assoc (rev_fixes, x) of
skalberg@15531
   485
            SOME x' => Free (if lookup_skolem ctxt x' = SOME x then x' else NameSpace.hidden x', T)
skalberg@15531
   486
          | NONE => t)
wenzelm@9133
   487
      | extern (t $ u) = extern t $ extern u
wenzelm@9133
   488
      | extern (Abs (x, T, t)) = Abs (x, T, extern t)
wenzelm@9133
   489
      | extern a = a;
wenzelm@9133
   490
  in extern end
wenzelm@9133
   491
wenzelm@8096
   492
wenzelm@5819
   493
(** prepare terms and propositions **)
wenzelm@5819
   494
wenzelm@5819
   495
(*
wenzelm@5819
   496
  (1) read / certify wrt. signature of context
wenzelm@5819
   497
  (2) intern Skolem constants
wenzelm@5819
   498
  (3) expand term bindings
wenzelm@5819
   499
*)
wenzelm@5819
   500
wenzelm@5819
   501
wenzelm@5819
   502
(* read / certify wrt. signature *)     (*exception ERROR*) (*exception TERM*)
wenzelm@5819
   503
wenzelm@14828
   504
fun read_def_termTs freeze pp syn sg (types, sorts, used) sTs =
wenzelm@14901
   505
  Sign.read_def_terms' pp (Sign.is_logtype sg) syn (sg, types, sorts) used freeze sTs;
wenzelm@5874
   506
wenzelm@14828
   507
fun read_def_termT freeze pp syn sg defs sT =
wenzelm@14828
   508
  apfst hd (read_def_termTs freeze pp syn sg defs [sT]);
wenzelm@14828
   509
wenzelm@14828
   510
fun read_term_sg freeze pp syn sg defs s =
wenzelm@14828
   511
  #1 (read_def_termT freeze pp syn sg defs (s, TypeInfer.logicT));
wenzelm@5874
   512
wenzelm@14828
   513
fun read_prop_sg freeze pp syn sg defs s =
wenzelm@14828
   514
  #1 (read_def_termT freeze pp syn sg defs (s, propT));
wenzelm@12072
   515
wenzelm@14828
   516
fun read_terms_sg freeze pp syn sg defs =
wenzelm@14828
   517
  #1 o read_def_termTs freeze pp syn sg defs o map (rpair TypeInfer.logicT);
wenzelm@12072
   518
wenzelm@14828
   519
fun read_props_sg freeze pp syn sg defs =
wenzelm@14828
   520
  #1 o read_def_termTs freeze pp syn sg defs o map (rpair propT);
wenzelm@5819
   521
wenzelm@5819
   522
wenzelm@14828
   523
fun cert_term_sg pp sg t = #1 (Sign.certify_term pp sg t);
wenzelm@5819
   524
wenzelm@14828
   525
fun cert_prop_sg pp sg tm =
wenzelm@14828
   526
  let val (t, T, _) = Sign.certify_term pp sg tm
wenzelm@10465
   527
  in if T = propT then t else raise TERM ("Term not of type prop", [t]) end;
wenzelm@5819
   528
wenzelm@5819
   529
wenzelm@5819
   530
(* norm_term *)
wenzelm@5819
   531
wenzelm@5819
   532
(*beta normal form for terms (not eta normal form), chase variables in
wenzelm@5819
   533
  bindings environment (code taken from Pure/envir.ML)*)
wenzelm@5819
   534
wenzelm@8616
   535
fun unifyT ctxt (T, U) =
wenzelm@8616
   536
  let val maxidx = Int.max (Term.maxidx_of_typ T, Term.maxidx_of_typ U)
wenzelm@12530
   537
  in #1 (Type.unify (Sign.tsig_of (sign_of ctxt)) (Vartab.empty, maxidx) (T, U)) end;
wenzelm@8616
   538
wenzelm@14720
   539
fun norm_term (ctxt as Context {binds, ...}) schematic =
wenzelm@5819
   540
  let
wenzelm@5819
   541
    (*raised when norm has no effect on a term, to do sharing instead of copying*)
wenzelm@5819
   542
    exception SAME;
wenzelm@5819
   543
wenzelm@5819
   544
    fun norm (t as Var (xi, T)) =
wenzelm@5819
   545
          (case Vartab.lookup (binds, xi) of
wenzelm@15758
   546
            SOME (u, U) =>
wenzelm@8616
   547
              let
wenzelm@8616
   548
                val env = unifyT ctxt (T, U) handle Type.TUNIFY =>
ballarin@14174
   549
                  raise TYPE ("norm_term: ill-typed variable assignment", [T, U], [t, u]);
berghofe@15798
   550
                val u' = Envir.subst_TVars env u;
wenzelm@8616
   551
              in norm u' handle SAME => u' end
wenzelm@15758
   552
          | NONE =>
wenzelm@10554
   553
            if schematic then raise SAME
wenzelm@10554
   554
            else raise CONTEXT ("Unbound schematic variable: " ^ Syntax.string_of_vname xi, ctxt))
wenzelm@5819
   555
      | norm (Abs (a, T, body)) =  Abs (a, T, norm body)
wenzelm@5819
   556
      | norm (Abs (_, _, body) $ t) = normh (subst_bound (t, body))
wenzelm@5819
   557
      | norm (f $ t) =
wenzelm@5819
   558
          ((case norm f of
wenzelm@5819
   559
            Abs (_, _, body) => normh (subst_bound (t, body))
wenzelm@5819
   560
          | nf => nf $ (norm t handle SAME => t)) handle SAME => f $ norm t)
wenzelm@5819
   561
      | norm _ =  raise SAME
wenzelm@5819
   562
    and normh t = norm t handle SAME => t
wenzelm@5819
   563
  in normh end;
wenzelm@5819
   564
wenzelm@5819
   565
wenzelm@6550
   566
(* dummy patterns *)
wenzelm@6550
   567
wenzelm@9540
   568
fun prepare_dummies t = #2 (Term.replace_dummy_patterns (1, t));
wenzelm@6762
   569
wenzelm@9540
   570
fun reject_dummies ctxt t = Term.no_dummy_patterns t
wenzelm@9540
   571
  handle TERM _ => raise CONTEXT ("Illegal dummy pattern(s) in term", ctxt);
wenzelm@6550
   572
wenzelm@6550
   573
wenzelm@5819
   574
(* read terms *)
wenzelm@5819
   575
wenzelm@10554
   576
local
wenzelm@10554
   577
skalberg@15531
   578
fun append_env e1 e2 x = (case e2 x of NONE => e1 x | some => some);
wenzelm@14720
   579
wenzelm@16031
   580
fun gen_read' read app pattern schematic
wenzelm@14720
   581
    ctxt internal more_types more_sorts more_used s =
ballarin@14174
   582
  let
wenzelm@14720
   583
    val types = append_env (def_type ctxt pattern) more_types;
wenzelm@14720
   584
    val sorts = append_env (def_sort ctxt) more_sorts;
wenzelm@14720
   585
    val used = used_types ctxt @ more_used;
ballarin@14174
   586
  in
wenzelm@14828
   587
    (transform_error (read (pp ctxt) (syn_of ctxt) (sign_of ctxt) (types, sorts, used)) s
ballarin@14174
   588
      handle TERM (msg, _) => raise CONTEXT (msg, ctxt)
wenzelm@14720
   589
        | ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt))
wenzelm@14720
   590
    |> app (intern_skolem ctxt internal)
wenzelm@14720
   591
    |> app (if pattern then I else norm_term ctxt schematic)
wenzelm@16031
   592
    |> app (if pattern then prepare_dummies else reject_dummies ctxt)
wenzelm@14720
   593
  end;
wenzelm@14720
   594
wenzelm@16031
   595
fun gen_read read app pattern schematic ctxt =
wenzelm@16031
   596
  gen_read' read app pattern schematic ctxt (K false) (K NONE) (K NONE) [];
wenzelm@14720
   597
wenzelm@10554
   598
in
wenzelm@10554
   599
wenzelm@16031
   600
val read_termTs           = gen_read' (read_def_termTs false) (apfst o map) false false;
wenzelm@16031
   601
val read_termTs_schematic = gen_read' (read_def_termTs false) (apfst o map) false true;
wenzelm@8096
   602
wenzelm@14720
   603
fun read_term_pats T ctxt =
wenzelm@16031
   604
  #1 o gen_read (read_def_termTs false) (apfst o map) true false ctxt o map (rpair T);
wenzelm@8096
   605
val read_prop_pats = read_term_pats propT;
wenzelm@8096
   606
wenzelm@14720
   607
fun read_term_liberal ctxt =
wenzelm@16031
   608
  gen_read' (read_term_sg true) I false false ctxt (K true) (K NONE) (K NONE) [];
wenzelm@14720
   609
wenzelm@16031
   610
val read_term              = gen_read (read_term_sg true) I false false;
wenzelm@16031
   611
val read_prop              = gen_read (read_prop_sg true) I false false;
wenzelm@16031
   612
val read_prop_schematic    = gen_read (read_prop_sg true) I false true;
wenzelm@16031
   613
val read_terms             = gen_read (read_terms_sg true) map false false;
wenzelm@16031
   614
fun read_props schematic   = gen_read (read_props_sg true) map false schematic;
wenzelm@5819
   615
wenzelm@10554
   616
end;
wenzelm@10554
   617
wenzelm@5819
   618
wenzelm@5819
   619
(* certify terms *)
wenzelm@5819
   620
wenzelm@10554
   621
local
wenzelm@10554
   622
wenzelm@14720
   623
fun gen_cert cert pattern schematic ctxt t = t
wenzelm@14720
   624
  |> (if pattern then I else norm_term ctxt schematic)
wenzelm@14828
   625
  |> (fn t' => cert (pp ctxt) (sign_of ctxt) t'
wenzelm@14828
   626
    handle TERM (msg, _) => raise CONTEXT (msg, ctxt));
wenzelm@5819
   627
wenzelm@10554
   628
in
wenzelm@8096
   629
wenzelm@10554
   630
val cert_term = gen_cert cert_term_sg false false;
wenzelm@10554
   631
val cert_prop = gen_cert cert_prop_sg false false;
wenzelm@10554
   632
val cert_props = map oo gen_cert cert_prop_sg false;
wenzelm@10554
   633
wenzelm@10554
   634
fun cert_term_pats _ = map o gen_cert cert_term_sg true false;
wenzelm@10554
   635
val cert_prop_pats = map o gen_cert cert_prop_sg true false;
wenzelm@10554
   636
wenzelm@10554
   637
end;
wenzelm@5819
   638
wenzelm@5819
   639
wenzelm@5819
   640
(* declare terms *)
wenzelm@5819
   641
wenzelm@10381
   642
local
wenzelm@10381
   643
wenzelm@5819
   644
val ins_types = foldl_aterms
wenzelm@5819
   645
  (fn (types, Free (x, T)) => Vartab.update (((x, ~1), T), types)
wenzelm@5819
   646
    | (types, Var v) => Vartab.update (v, types)
wenzelm@5819
   647
    | (types, _) => types);
wenzelm@5819
   648
wenzelm@5819
   649
val ins_sorts = foldl_types (foldl_atyps
wenzelm@5819
   650
  (fn (sorts, TFree (x, S)) => Vartab.update (((x, ~1), S), sorts)
wenzelm@5819
   651
    | (sorts, TVar v) => Vartab.update (v, sorts)
wenzelm@5819
   652
    | (sorts, _) => sorts));
wenzelm@5819
   653
wenzelm@8616
   654
val ins_used = foldl_term_types (fn t => foldl_atyps
wenzelm@12504
   655
  (fn (used, TFree (x, _)) => x ins_string used
wenzelm@12504
   656
    | (used, _) => used));
wenzelm@12291
   657
wenzelm@12291
   658
val ins_occs = foldl_term_types (fn t => foldl_atyps
wenzelm@12291
   659
  (fn (tab, TFree (x, _)) => Symtab.update_multi ((x, t), tab) | (tab, _) => tab));
wenzelm@5819
   660
skalberg@15574
   661
fun ins_skolem def_ty = foldr
wenzelm@5994
   662
  (fn ((x, x'), types) =>
wenzelm@7663
   663
    (case def_ty x' of
skalberg@15531
   664
      SOME T => Vartab.update (((x, ~1), T), types)
skalberg@15531
   665
    | NONE => types));
wenzelm@5994
   666
ballarin@15735
   667
fun map_defaults f = map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
ballarin@15735
   668
  (thy, syntax, data, asms, binds, thms, cases, f defs));
wenzelm@5819
   669
wenzelm@16031
   670
in
wenzelm@16031
   671
wenzelm@16031
   672
fun declare_term_syntax t ctxt =
wenzelm@5819
   673
  ctxt
wenzelm@12291
   674
  |> map_defaults (fn (types, sorts, used, occ) => (ins_types (types, t), sorts, used, occ))
wenzelm@12291
   675
  |> map_defaults (fn (types, sorts, used, occ) => (types, ins_sorts (sorts, t), used, occ))
wenzelm@12291
   676
  |> map_defaults (fn (types, sorts, used, occ) => (types, sorts, ins_used (used, t), occ));
wenzelm@10381
   677
wenzelm@16031
   678
fun declare_term t (ctxt as Context {asms = (_, fixes), ...}) =
wenzelm@16031
   679
  ctxt
wenzelm@16031
   680
  |> declare_term_syntax t
wenzelm@12291
   681
  |> map_defaults (fn (types, sorts, used, occ) => (types, sorts, used, ins_occs (occ, t)))
wenzelm@12291
   682
  |> map_defaults (fn (types, sorts, used, occ) =>
skalberg@15574
   683
      (ins_skolem (fn x => Vartab.lookup (types, (x, ~1))) types fixes, sorts, used, occ));
wenzelm@5819
   684
wenzelm@10381
   685
end;
wenzelm@5819
   686
wenzelm@5819
   687
wenzelm@15703
   688
(* type and constant names *)
wenzelm@15703
   689
wenzelm@15703
   690
fun read_tyname ctxt c =
wenzelm@15703
   691
  if c mem_string used_types ctxt then
wenzelm@15974
   692
    TFree (c, if_none (def_sort ctxt (c, ~1)) (Sign.defaultS (sign_of ctxt)))
wenzelm@15703
   693
  else Sign.read_tyname (sign_of ctxt) c;
wenzelm@15703
   694
wenzelm@15703
   695
fun read_const ctxt c =
wenzelm@15703
   696
  (case lookup_skolem ctxt c of
wenzelm@15703
   697
    SOME c' => Free (c', dummyT)
wenzelm@15703
   698
  | NONE => Sign.read_const (sign_of ctxt) c);
wenzelm@15703
   699
wenzelm@15703
   700
wenzelm@8616
   701
wenzelm@8616
   702
(** Hindley-Milner polymorphism **)
wenzelm@8616
   703
wenzelm@7925
   704
(* warn_extra_tfrees *)
wenzelm@7925
   705
wenzelm@12130
   706
fun warn_extra_tfrees
wenzelm@12291
   707
    (ctxt1 as Context {defs = (_, _, _, occ1), ...})
wenzelm@12291
   708
    (ctxt2 as Context {defs = (_, _, _, occ2), ...}) =
wenzelm@12130
   709
  let
wenzelm@12130
   710
    fun known_tfree a (Type (_, Ts)) = exists (known_tfree a) Ts
wenzelm@12130
   711
      | known_tfree a (TFree (a', _)) = a = a'
wenzelm@12130
   712
      | known_tfree _ _ = false;
wenzelm@8616
   713
wenzelm@12130
   714
    val extras =
wenzelm@12291
   715
      Library.gen_rems Library.eq_fst (Symtab.dest occ2, Symtab.dest occ1)
wenzelm@16031
   716
      |> map (fn (a, ts) => map (pair a) (List.mapPartial (try (#1 o Term.dest_Free)) ts))
wenzelm@16031
   717
      |> List.concat
skalberg@15570
   718
      |> List.mapPartial (fn (a, x) =>
skalberg@15531
   719
          (case def_type ctxt1 false (x, ~1) of NONE => SOME (a, x)
skalberg@15531
   720
          | SOME T => if known_tfree a T then NONE else SOME (a, x)));
wenzelm@12130
   721
    val tfrees = map #1 extras |> Library.sort_strings |> Library.unique_strings;
wenzelm@12130
   722
    val frees = map #2 extras |> Library.sort_strings |> Library.unique_strings;
wenzelm@12130
   723
  in
wenzelm@12130
   724
    if null extras then ()
wenzelm@12130
   725
    else warning ("Just introduced free type variable(s): " ^ commas tfrees ^ " in " ^
wenzelm@12130
   726
      space_implode " or " frees);
wenzelm@12130
   727
    ctxt2
wenzelm@12130
   728
  end;
wenzelm@8616
   729
wenzelm@8616
   730
wenzelm@8616
   731
(* generalize type variables *)
wenzelm@8616
   732
wenzelm@12550
   733
fun generalize_tfrees inner outer =
wenzelm@8616
   734
  let
wenzelm@12057
   735
    val extra_fixes = fixed_names_of inner \\ fixed_names_of outer;
wenzelm@8616
   736
    fun still_fixed (Free (x, _)) = not (x mem_string extra_fixes)
wenzelm@8616
   737
      | still_fixed _ = false;
wenzelm@12550
   738
    val occs_inner = type_occs inner;
wenzelm@12550
   739
    val occs_outer = type_occs outer;
wenzelm@16031
   740
    fun add a gen =
wenzelm@15974
   741
      if is_some (Symtab.lookup (occs_outer, a)) orelse
wenzelm@12550
   742
        exists still_fixed (Symtab.lookup_multi (occs_inner, a))
wenzelm@8616
   743
      then gen else a :: gen;
wenzelm@16031
   744
  in fn tfrees => fold add tfrees [] end;
wenzelm@8616
   745
wenzelm@12550
   746
fun generalize inner outer ts =
wenzelm@8616
   747
  let
skalberg@15574
   748
    val tfrees = generalize_tfrees inner outer (foldr Term.add_term_tfree_names [] ts);
wenzelm@8616
   749
    fun gen (x, S) = if x mem_string tfrees then TVar ((x, 0), S) else TFree (x, S);
wenzelm@12550
   750
  in map (Term.map_term_types (Term.map_type_tfree gen)) ts end;
wenzelm@8616
   751
wenzelm@8616
   752
wenzelm@9553
   753
wenzelm@9553
   754
(** export theorems **)
wenzelm@8616
   755
skalberg@15531
   756
fun get_free x (NONE, t as Free (y, _)) = if x = y then SOME t else NONE
wenzelm@8616
   757
  | get_free _ (opt, _) = opt;
wenzelm@8616
   758
skalberg@15531
   759
fun find_free t x = foldl_aterms (get_free x) (NONE, t);
wenzelm@8616
   760
wenzelm@13415
   761
fun export_view view is_goal inner outer =
wenzelm@8616
   762
  let
wenzelm@12550
   763
    val gen = generalize_tfrees inner outer;
wenzelm@12057
   764
    val fixes = fixed_names_of inner \\ fixed_names_of outer;
wenzelm@12057
   765
    val asms = Library.drop (length (assumptions_of outer), assumptions_of inner);
wenzelm@11816
   766
    val exp_asms = map (fn (cprops, exp) => exp is_goal cprops) asms;
wenzelm@12550
   767
  in fn thm => thm
wenzelm@12804
   768
    |> Tactic.norm_hhf_rule
wenzelm@11816
   769
    |> Seq.EVERY (rev exp_asms)
wenzelm@13415
   770
    |> Seq.map (Drule.implies_intr_list view)
wenzelm@11816
   771
    |> Seq.map (fn rule =>
wenzelm@11816
   772
      let
wenzelm@11816
   773
        val {sign, prop, ...} = Thm.rep_thm rule;
skalberg@15570
   774
        val frees = map (Thm.cterm_of sign) (List.mapPartial (find_free prop) fixes);
wenzelm@12550
   775
        val tfrees = gen (Term.add_term_tfree_names (prop, []));
wenzelm@11816
   776
      in
wenzelm@11816
   777
        rule
wenzelm@11816
   778
        |> Drule.forall_intr_list frees
wenzelm@12804
   779
        |> Tactic.norm_hhf_rule
wenzelm@12504
   780
        |> (#1 o Drule.tvars_intr_list tfrees)
wenzelm@11816
   781
      end)
wenzelm@11816
   782
  end;
wenzelm@8616
   783
wenzelm@15758
   784
(*without varification*)
ballarin@15696
   785
fun export_view' view is_goal inner outer =
ballarin@15696
   786
  let
ballarin@15696
   787
    val asms = Library.drop (length (assumptions_of outer), assumptions_of inner);
ballarin@15696
   788
    val exp_asms = map (fn (cprops, exp) => exp is_goal cprops) asms;
ballarin@15696
   789
  in fn thm =>thm
ballarin@15696
   790
    |> Tactic.norm_hhf_plain
ballarin@15696
   791
    |> Seq.EVERY (rev exp_asms)
ballarin@15696
   792
    |> Seq.map (Drule.implies_intr_list view)
ballarin@15696
   793
    |> Seq.map Tactic.norm_hhf_plain
ballarin@15696
   794
  end;
ballarin@15696
   795
wenzelm@13415
   796
val export = export_view [];
wenzelm@13399
   797
ballarin@15696
   798
fun gen_export_std exp_view view inner outer =
ballarin@15696
   799
  let val exp = exp_view view false inner outer in
wenzelm@13378
   800
    fn th =>
wenzelm@13378
   801
      (case Seq.pull (exp th) of
skalberg@15531
   802
        SOME (th', _) => th' |> Drule.local_standard
skalberg@15531
   803
      | NONE => raise CONTEXT ("Internal failure while exporting theorem", inner))
wenzelm@13378
   804
  end;
wenzelm@12704
   805
ballarin@15696
   806
val export_standard = gen_export_std export_view;
ballarin@15696
   807
val export_plain = gen_export_std export_view';
wenzelm@7925
   808
wenzelm@5819
   809
wenzelm@15758
   810
wenzelm@5819
   811
(** bindings **)
wenzelm@5819
   812
wenzelm@15758
   813
(* delete_update_binds *)
wenzelm@15758
   814
wenzelm@15758
   815
local
wenzelm@5819
   816
wenzelm@15758
   817
fun del_bind xi = map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@15758
   818
  (thy, syntax, data, asms, Vartab.delete_safe xi binds, thms, cases, defs));
wenzelm@7606
   819
wenzelm@15758
   820
fun upd_bind ((x, i), t) =
wenzelm@8616
   821
  let
wenzelm@8616
   822
    val T = Term.fastype_of t;
wenzelm@8616
   823
    val t' =
wenzelm@8616
   824
      if null (Term.term_tvars t \\ Term.typ_tvars T) then t
wenzelm@8637
   825
      else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T);
wenzelm@8616
   826
  in
wenzelm@15758
   827
    map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@15758
   828
      (thy, syntax, data, asms, Vartab.update (((x, i), (t', T)), binds), thms, cases, defs))
wenzelm@15758
   829
    o declare_term t'
wenzelm@5819
   830
  end;
wenzelm@5819
   831
wenzelm@15758
   832
fun del_upd_bind (xi, NONE) = del_bind xi
wenzelm@15758
   833
  | del_upd_bind (xi, SOME t) = upd_bind (xi, t);
wenzelm@7606
   834
wenzelm@15758
   835
in
wenzelm@15758
   836
wenzelm@15758
   837
val delete_update_binds = fold del_upd_bind;
wenzelm@15758
   838
wenzelm@15758
   839
end;
wenzelm@7606
   840
wenzelm@5819
   841
wenzelm@8096
   842
(* simult_matches *)
wenzelm@8096
   843
wenzelm@8616
   844
fun simult_matches ctxt [] = []
wenzelm@8616
   845
  | simult_matches ctxt pairs =
wenzelm@8096
   846
      let
wenzelm@10554
   847
        fun fail () = raise CONTEXT ("Pattern match failed!", ctxt);
wenzelm@10554
   848
wenzelm@16031
   849
        val maxidx = fold (fn (t1, t2) => fn i =>
wenzelm@16031
   850
          Int.max (Int.max (Term.maxidx_of_term t1, Term.maxidx_of_term t2), i)) pairs ~1;
wenzelm@10554
   851
        val envs = Unify.smash_unifiers (sign_of ctxt, Envir.empty maxidx,
wenzelm@10554
   852
          map swap pairs);    (*prefer assignment of variables from patterns*)
wenzelm@10554
   853
        val env =
wenzelm@8096
   854
          (case Seq.pull envs of
skalberg@15531
   855
            NONE => fail ()
skalberg@15531
   856
          | SOME (env, _) => env);    (*ignore further results*)
wenzelm@12309
   857
        val domain =
wenzelm@12309
   858
          filter_out Term.is_replaced_dummy_pattern (map #1 (Drule.vars_of_terms (map #1 pairs)));
wenzelm@10554
   859
        val _ =    (*may not assign variables from text*)
wenzelm@12309
   860
          if null (map #1 (Envir.alist_of env) inter (map #1 (Drule.vars_of_terms (map #2 pairs))))
wenzelm@12309
   861
          then () else fail ();
berghofe@15798
   862
        fun norm_bind (xi, (_, t)) = if xi mem domain then SOME (xi, Envir.norm_term env t) else NONE;
skalberg@15570
   863
      in List.mapPartial norm_bind (Envir.alist_of env) end;
wenzelm@8096
   864
wenzelm@8096
   865
wenzelm@8096
   866
(* add_binds(_i) *)
wenzelm@5819
   867
wenzelm@7925
   868
local
wenzelm@7925
   869
wenzelm@16031
   870
fun gen_bind prep (xi as (x, _), raw_t) ctxt =
skalberg@15570
   871
  ctxt |> delete_update_binds [(xi, Option.map (prep ctxt) raw_t)];
wenzelm@5819
   872
wenzelm@10810
   873
in
wenzelm@10810
   874
skalberg@15531
   875
fun drop_schematic (b as (xi, SOME t)) = if null (Term.term_vars t) then b else (xi, NONE)
wenzelm@10554
   876
  | drop_schematic b = b;
wenzelm@10554
   877
wenzelm@16031
   878
val add_binds = fold (gen_bind read_term);
wenzelm@16031
   879
val add_binds_i = fold (gen_bind cert_term);
wenzelm@8616
   880
wenzelm@12147
   881
fun auto_bind f ts ctxt = ctxt |> add_binds_i (map drop_schematic (f (sign_of ctxt) ts));
wenzelm@12147
   882
val auto_bind_goal = auto_bind AutoBind.goal;
wenzelm@12147
   883
val auto_bind_facts = auto_bind AutoBind.facts;
wenzelm@7925
   884
wenzelm@7925
   885
end;
wenzelm@5819
   886
wenzelm@5819
   887
wenzelm@8096
   888
(* match_bind(_i) *)
wenzelm@5819
   889
wenzelm@8096
   890
local
wenzelm@8096
   891
wenzelm@10465
   892
fun prep_bind prep_pats (ctxt, (raw_pats, t)) =
wenzelm@5819
   893
  let
wenzelm@8096
   894
    val ctxt' = declare_term t ctxt;
wenzelm@8096
   895
    val pats = prep_pats (fastype_of t) ctxt' raw_pats;
wenzelm@8616
   896
    val binds = simult_matches ctxt' (map (rpair t) pats);
wenzelm@8616
   897
  in (ctxt', binds) end;
wenzelm@7670
   898
wenzelm@10465
   899
fun gen_binds prep_terms prep_pats gen raw_binds ctxt =
wenzelm@8616
   900
  let
wenzelm@10465
   901
    val ts = prep_terms ctxt (map snd raw_binds);
wenzelm@10465
   902
    val (ctxt', binds) =
skalberg@15570
   903
      apsnd List.concat (foldl_map (prep_bind prep_pats) (ctxt, map fst raw_binds ~~ ts));
wenzelm@8616
   904
    val binds' =
wenzelm@12550
   905
      if gen then map #1 binds ~~ generalize ctxt' ctxt (map #2 binds)
wenzelm@8616
   906
      else binds;
skalberg@15531
   907
    val binds'' = map (apsnd SOME) binds';
wenzelm@8616
   908
  in
wenzelm@8616
   909
    warn_extra_tfrees ctxt
wenzelm@16031
   910
     (if gen then
wenzelm@16031
   911
        ctxt (*sic!*) |> fold declare_term (map #2 binds') |> add_binds_i binds''
wenzelm@8616
   912
      else ctxt' |> add_binds_i binds'')
wenzelm@8616
   913
  end;
wenzelm@8096
   914
wenzelm@8096
   915
in
wenzelm@5935
   916
wenzelm@10465
   917
val match_bind = gen_binds read_terms read_term_pats;
wenzelm@10465
   918
val match_bind_i = gen_binds (map o cert_term) cert_term_pats;
wenzelm@8096
   919
wenzelm@8096
   920
end;
wenzelm@5935
   921
wenzelm@5935
   922
wenzelm@10465
   923
(* propositions with patterns *)
wenzelm@5935
   924
wenzelm@10465
   925
local
wenzelm@8096
   926
wenzelm@10554
   927
fun prep_propp schematic prep_props prep_pats (context, args) =
wenzelm@10465
   928
  let
wenzelm@10465
   929
    fun prep ((ctxt, prop :: props), (_, (raw_pats1, raw_pats2))) =
wenzelm@10465
   930
          let
wenzelm@10465
   931
            val ctxt' = declare_term prop ctxt;
wenzelm@10465
   932
            val pats = prep_pats ctxt' (raw_pats1 @ raw_pats2);    (*simultaneous type inference!*)
nipkow@13629
   933
          in ((ctxt', props), (prop, splitAt(length raw_pats1, pats))) end
wenzelm@10465
   934
      | prep _ = sys_error "prep_propp";
wenzelm@10465
   935
    val ((context', _), propp) = foldl_map (foldl_map prep)
skalberg@15570
   936
        ((context, prep_props schematic context (List.concat (map (map fst) args))), args);
wenzelm@10465
   937
  in (context', propp) end;
wenzelm@5935
   938
wenzelm@10465
   939
fun matches ctxt (prop, (pats1, pats2)) =
wenzelm@10465
   940
  simult_matches ctxt (map (rpair prop) pats1 @ map (rpair (Logic.strip_imp_concl prop)) pats2);
wenzelm@8096
   941
wenzelm@10465
   942
fun gen_bind_propp prepp (ctxt, raw_args) =
wenzelm@8096
   943
  let
wenzelm@10465
   944
    val (ctxt', args) = prepp (ctxt, raw_args);
skalberg@15570
   945
    val binds = List.concat (List.concat (map (map (matches ctxt')) args));
wenzelm@10465
   946
    val propss = map (map #1) args;
wenzelm@8616
   947
wenzelm@10554
   948
    (*generalize result: context evaluated now, binds added later*)
wenzelm@8616
   949
    val gen = generalize ctxt' ctxt;
skalberg@15531
   950
    fun gen_binds c = c |> add_binds_i (map #1 binds ~~ map SOME (gen (map #2 binds)));
skalberg@15531
   951
  in (ctxt' |> add_binds_i (map (apsnd SOME) binds), (propss, gen_binds)) end;
wenzelm@8096
   952
wenzelm@10465
   953
in
wenzelm@10465
   954
wenzelm@11925
   955
val read_propp = prep_propp false read_props read_prop_pats;
wenzelm@11925
   956
val cert_propp = prep_propp false cert_props cert_prop_pats;
wenzelm@10554
   957
val read_propp_schematic = prep_propp true read_props read_prop_pats;
wenzelm@10554
   958
val cert_propp_schematic = prep_propp true cert_props cert_prop_pats;
wenzelm@10554
   959
wenzelm@11925
   960
val bind_propp = gen_bind_propp read_propp;
wenzelm@11925
   961
val bind_propp_i = gen_bind_propp cert_propp;
wenzelm@11925
   962
val bind_propp_schematic = gen_bind_propp read_propp_schematic;
wenzelm@10554
   963
val bind_propp_schematic_i = gen_bind_propp cert_propp_schematic;
wenzelm@6789
   964
wenzelm@10465
   965
end;
wenzelm@10465
   966
wenzelm@6789
   967
wenzelm@5819
   968
wenzelm@5819
   969
(** theorems **)
wenzelm@5819
   970
wenzelm@6091
   971
(* get_thm(s) *)
wenzelm@5819
   972
wenzelm@9566
   973
(*beware of proper order of evaluation!*)
wenzelm@13278
   974
fun retrieve_thms f g (ctxt as Context {thy, thms = (_, space, tab, _), ...}) =
wenzelm@9566
   975
  let
wenzelm@9566
   976
    val sg_ref = Sign.self_ref (Theory.sign_of thy);
wenzelm@9566
   977
    val get_from_thy = f thy;
wenzelm@9566
   978
  in
berghofe@15456
   979
    fn xnamei as (xname, _) =>
wenzelm@12309
   980
      (case Symtab.lookup (tab, NameSpace.intern space xname) of
wenzelm@15758
   981
        SOME ths => map (Thm.transfer_sg (Sign.deref sg_ref)) (PureThy.select_thm xnamei ths)
berghofe@15456
   982
      | _ => get_from_thy xnamei) |> g xname
wenzelm@9566
   983
  end;
wenzelm@5819
   984
wenzelm@9566
   985
val get_thm = retrieve_thms PureThy.get_thms PureThy.single_thm;
wenzelm@9566
   986
val get_thm_closure = retrieve_thms PureThy.get_thms_closure PureThy.single_thm;
wenzelm@9566
   987
val get_thms = retrieve_thms PureThy.get_thms (K I);
wenzelm@9566
   988
val get_thms_closure = retrieve_thms PureThy.get_thms_closure (K I);
wenzelm@5819
   989
wenzelm@5819
   990
wenzelm@16031
   991
(* valid_thms *)
wenzelm@16031
   992
wenzelm@16031
   993
fun valid_thms ctxt (name, ths) =
wenzelm@16031
   994
  (case try (transform_error (fn () => get_thms ctxt (name, NONE))) () of
wenzelm@16031
   995
    NONE => false
wenzelm@16147
   996
  | SOME ths' => Thm.eq_thms (ths, ths'));
wenzelm@16031
   997
wenzelm@16031
   998
wenzelm@16031
   999
(* lthms_containing *)
wenzelm@16031
  1000
wenzelm@16031
  1001
fun lthms_containing ctxt spec =
wenzelm@16031
  1002
  FactIndex.find (fact_index_of ctxt) spec
wenzelm@16031
  1003
  |> List.filter (valid_thms ctxt)
wenzelm@16031
  1004
  |> gen_distinct eq_fst;
wenzelm@16031
  1005
wenzelm@16031
  1006
wenzelm@13425
  1007
(* name space operations *)
wenzelm@12309
  1008
wenzelm@16147
  1009
fun extern (Context {thms = (_, space, _, _), ...}) = NameSpace.extern space;
wenzelm@12309
  1010
wenzelm@16147
  1011
fun map_naming f = map_context (fn (thy, syntax, data, asms, binds,
wenzelm@16147
  1012
    (naming, space, tab, index), cases, defs) =>
wenzelm@16147
  1013
  (thy, syntax, data, asms, binds, (f naming, space, tab, index), cases, defs));
wenzelm@12309
  1014
wenzelm@16147
  1015
val qualified_names = map_naming NameSpace.qualified_names;
wenzelm@16147
  1016
val no_base_names = map_naming NameSpace.no_base_names;
wenzelm@16147
  1017
val custom_accesses = map_naming o NameSpace.custom_accesses;
wenzelm@16147
  1018
fun restore_naming (Context {thms, ...}) = map_naming (K (#1 thms));
wenzelm@12309
  1019
wenzelm@13425
  1020
fun hide_thms fully names =
wenzelm@16147
  1021
  map_context (fn (thy, syntax, data, asms, binds, (naming, space, tab, index), cases, defs) =>
wenzelm@16147
  1022
    (thy, syntax, data, asms, binds,
wenzelm@16147
  1023
      (naming, fold (NameSpace.hide fully) names space, tab, index), cases, defs));
wenzelm@13425
  1024
wenzelm@12309
  1025
wenzelm@6091
  1026
(* put_thm(s) *)
wenzelm@5819
  1027
wenzelm@16147
  1028
fun put_thms ("", _) ctxt = ctxt
wenzelm@16147
  1029
  | put_thms (bname, ths) ctxt = ctxt |> map_context
wenzelm@16147
  1030
      (fn (thy, syntax, data, asms, binds, (naming, space, tab, index), cases, defs) =>
wenzelm@16147
  1031
        let
wenzelm@16147
  1032
          val name = NameSpace.full naming bname;
wenzelm@16147
  1033
          val space' = NameSpace.declare naming name space;
wenzelm@16147
  1034
          val tab' = Symtab.update ((name, ths), tab);
wenzelm@16147
  1035
          val index' = FactIndex.add (is_known ctxt) (name, ths) index;
wenzelm@16147
  1036
        in (thy, syntax, data, asms, binds, (naming, space', tab', index'), cases, defs) end);
wenzelm@5819
  1037
wenzelm@16147
  1038
fun put_thm (name, th) = put_thms (name, [th]);
wenzelm@16147
  1039
val put_thmss = fold put_thms;
wenzelm@5819
  1040
wenzelm@15758
  1041
wenzelm@7606
  1042
(* reset_thms *)
wenzelm@7606
  1043
wenzelm@12309
  1044
fun reset_thms name =
ballarin@15735
  1045
  map_context (fn (thy, syntax, data, asms, binds, (q, space, tab, index), cases, defs) =>
wenzelm@15758
  1046
    (thy, syntax, data, asms, binds, (q, space, Symtab.delete_safe name tab, index),
ballarin@15735
  1047
      cases, defs));
wenzelm@7606
  1048
wenzelm@7606
  1049
wenzelm@14564
  1050
(* note_thmss *)
wenzelm@5819
  1051
wenzelm@12711
  1052
local
wenzelm@16147
  1053
wenzelm@16147
  1054
fun gen_note_thss get (ctxt, ((name, more_attrs), ths_attrs)) =
wenzelm@5819
  1055
  let
wenzelm@5819
  1056
    fun app ((ct, ths), (th, attrs)) =
wenzelm@12711
  1057
      let val (ct', th') = Thm.applys_attributes ((ct, get ctxt th), attrs @ more_attrs)
wenzelm@12711
  1058
      in (ct', th' :: ths) end;
skalberg@15570
  1059
    val (ctxt', rev_thms) = Library.foldl app ((ctxt, []), ths_attrs);
skalberg@15570
  1060
    val thms = List.concat (rev rev_thms);
wenzelm@16147
  1061
  in (ctxt' |> put_thms (name, thms), (name, thms)) end;
wenzelm@5819
  1062
wenzelm@16147
  1063
fun gen_note_thmss get args ctxt =
wenzelm@16147
  1064
  foldl_map (gen_note_thss get) (ctxt, args);
wenzelm@12711
  1065
wenzelm@12711
  1066
in
wenzelm@12711
  1067
wenzelm@16147
  1068
val note_thmss = gen_note_thmss get_thms;
wenzelm@16147
  1069
val note_thmss_i = gen_note_thmss (K I);
ballarin@15696
  1070
ballarin@15696
  1071
val note_thmss_accesses = gen_note_thmss get_thms;
ballarin@15696
  1072
val note_thmss_accesses_i = gen_note_thmss (K I);
wenzelm@12711
  1073
wenzelm@12711
  1074
end;
wenzelm@9196
  1075
wenzelm@5819
  1076
wenzelm@5819
  1077
wenzelm@5819
  1078
(** assumptions **)
wenzelm@5819
  1079
wenzelm@11918
  1080
(* basic exporters *)
wenzelm@11918
  1081
wenzelm@11918
  1082
fun export_assume true = Seq.single oo Drule.implies_intr_goals
wenzelm@11918
  1083
  | export_assume false = Seq.single oo Drule.implies_intr_list;
wenzelm@11918
  1084
wenzelm@11918
  1085
fun export_presume _ = export_assume false;
wenzelm@11918
  1086
wenzelm@11918
  1087
wenzelm@12057
  1088
(* defs *)
wenzelm@12057
  1089
wenzelm@12066
  1090
fun cert_def ctxt eq =
wenzelm@12016
  1091
  let
wenzelm@12057
  1092
    fun err msg = raise CONTEXT (msg ^
wenzelm@12057
  1093
      "\nThe error(s) above occurred in local definition: " ^ string_of_term ctxt eq, ctxt);
wenzelm@12057
  1094
    val (lhs, rhs) = Logic.dest_equals (Term.strip_all_body eq)
wenzelm@12057
  1095
      handle TERM _ => err "Not a meta-equality (==)";
wenzelm@12086
  1096
    val (f, xs) = Term.strip_comb lhs;
wenzelm@12086
  1097
    val (c, _) = Term.dest_Free f handle TERM _ =>
wenzelm@13430
  1098
      err "Head of lhs must be a free/fixed variable";
wenzelm@12057
  1099
wenzelm@12086
  1100
    fun is_free (Free (x, _)) = not (is_fixed ctxt x)
wenzelm@12086
  1101
      | is_free _ = false;
skalberg@15570
  1102
    val extra_frees = List.filter is_free (term_frees rhs) \\ xs;
wenzelm@12016
  1103
  in
wenzelm@12086
  1104
    conditional (not (forall (is_Bound orf is_free) xs andalso null (duplicates xs))) (fn () =>
wenzelm@13430
  1105
      err "Arguments of lhs must be distinct free/bound variables");
wenzelm@12086
  1106
    conditional (f mem Term.term_frees rhs) (fn () =>
wenzelm@12086
  1107
      err "Element to be defined occurs on rhs");
wenzelm@12086
  1108
    conditional (not (null extra_frees)) (fn () =>
wenzelm@12086
  1109
      err ("Extra free variables on rhs: " ^ commas_quote (map (#1 o dest_Free) extra_frees)));
skalberg@15570
  1110
    (c, Term.list_all_free (List.mapPartial (try Term.dest_Free) xs, eq))
wenzelm@12057
  1111
  end;
wenzelm@12057
  1112
wenzelm@12057
  1113
fun head_of_def cprop =
wenzelm@12057
  1114
  #1 (Term.strip_comb (#1 (Logic.dest_equals (Term.strip_all_body (Thm.term_of cprop)))))
wenzelm@12057
  1115
  |> Thm.cterm_of (Thm.sign_of_cterm cprop);
wenzelm@11918
  1116
wenzelm@11918
  1117
fun export_def _ cprops thm =
wenzelm@11918
  1118
  thm
wenzelm@11918
  1119
  |> Drule.implies_intr_list cprops
wenzelm@12057
  1120
  |> Drule.forall_intr_list (map head_of_def cprops)
wenzelm@11918
  1121
  |> Drule.forall_elim_vars 0
wenzelm@11918
  1122
  |> RANGE (replicate (length cprops) (Tactic.rtac Drule.reflexive_thm)) 1;
wenzelm@11918
  1123
wenzelm@11918
  1124
wenzelm@5819
  1125
(* assume *)
wenzelm@5819
  1126
wenzelm@7270
  1127
local
wenzelm@6797
  1128
wenzelm@10465
  1129
fun add_assm (ctxt, ((name, attrs), props)) =
wenzelm@5819
  1130
  let
wenzelm@10465
  1131
    val cprops = map (Thm.cterm_of (sign_of ctxt)) props;
wenzelm@12804
  1132
    val asms = map (Tactic.norm_hhf_rule o Thm.assume) cprops;
wenzelm@5919
  1133
wenzelm@5919
  1134
    val ths = map (fn th => ([th], [])) asms;
wenzelm@10465
  1135
    val (ctxt', [(_, thms)]) =
wenzelm@10465
  1136
      ctxt
wenzelm@12147
  1137
      |> auto_bind_facts props
wenzelm@14564
  1138
      |> note_thmss_i [((name, attrs), ths)];
wenzelm@10465
  1139
  in (ctxt', (cprops, (name, asms), (name, thms))) end;
wenzelm@5819
  1140
wenzelm@9470
  1141
fun gen_assms prepp exp args ctxt =
wenzelm@9470
  1142
  let
wenzelm@10465
  1143
    val (ctxt1, propss) = prepp (ctxt, map snd args);
wenzelm@10465
  1144
    val (ctxt2, results) = foldl_map add_assm (ctxt1, map fst args ~~ propss);
wenzelm@10465
  1145
skalberg@15570
  1146
    val cprops = List.concat (map #1 results);
wenzelm@9470
  1147
    val asmss = map #2 results;
wenzelm@9470
  1148
    val thmss = map #3 results;
wenzelm@12072
  1149
    val ctxt3 = ctxt2 |> map_context
ballarin@15735
  1150
      (fn (thy, syntax, data, ((asms_ct, asms_th), fixes), binds, thms, cases, defs) =>
wenzelm@12072
  1151
        (thy, syntax, data, ((asms_ct @ [(cprops, exp)], asms_th @ asmss), fixes), binds, thms,
ballarin@15735
  1152
          cases, defs));
wenzelm@11925
  1153
    val ctxt4 = ctxt3 |> put_thms ("prems", prems_of ctxt3);
wenzelm@11925
  1154
  in (warn_extra_tfrees ctxt ctxt4, thmss) end;
wenzelm@5819
  1155
wenzelm@7270
  1156
in
wenzelm@7270
  1157
wenzelm@8616
  1158
val assume = gen_assms (apsnd #1 o bind_propp);
wenzelm@8616
  1159
val assume_i = gen_assms (apsnd #1 o bind_propp_i);
wenzelm@7270
  1160
wenzelm@7270
  1161
end;
wenzelm@5819
  1162
wenzelm@5819
  1163
wenzelm@8096
  1164
(* variables *)
wenzelm@8096
  1165
wenzelm@10381
  1166
local
wenzelm@10381
  1167
wenzelm@14720
  1168
fun prep_vars prep_typ internal liberal (ctxt, (xs, raw_T)) =
wenzelm@8096
  1169
  let
wenzelm@12504
  1170
    fun cond_tvars T =
wenzelm@12504
  1171
      if internal then T
wenzelm@12504
  1172
      else Type.no_tvars T handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
wenzelm@12504
  1173
wenzelm@14720
  1174
    val _ = if liberal then () else
skalberg@15570
  1175
      (case List.filter (not o Syntax.is_identifier) (map (no_skolem internal ctxt) xs) of
wenzelm@8096
  1176
      [] => () | bads => raise CONTEXT ("Bad variable name(s): " ^ commas_quote bads, ctxt));
wenzelm@8096
  1177
skalberg@15570
  1178
    val opt_T = Option.map (cond_tvars o prep_typ ctxt) raw_T;
wenzelm@15974
  1179
    val T = if_none opt_T TypeInfer.logicT;
wenzelm@16031
  1180
    val ctxt' = ctxt |> fold declare_term_syntax (map (fn x => Free (x, T)) xs);
wenzelm@8096
  1181
  in (ctxt', (xs, opt_T)) end;
wenzelm@8096
  1182
wenzelm@10381
  1183
in
wenzelm@10381
  1184
wenzelm@14720
  1185
val read_vars         = prep_vars read_typ false false;
wenzelm@14720
  1186
val cert_vars         = prep_vars cert_typ true false;
wenzelm@14720
  1187
val read_vars_liberal = prep_vars read_typ false true;
wenzelm@14720
  1188
val cert_vars_liberal = prep_vars cert_typ true true;
wenzelm@8096
  1189
wenzelm@10381
  1190
end;
wenzelm@10381
  1191
wenzelm@8096
  1192
wenzelm@5819
  1193
(* fix *)
wenzelm@5819
  1194
wenzelm@8096
  1195
local
wenzelm@8096
  1196
wenzelm@12309
  1197
fun map_fixes f =
ballarin@15735
  1198
  map_context (fn (thy, syntax, data, (assumes, fixes), binds, thms, cases, defs) =>
ballarin@15735
  1199
    (thy, syntax, data, (assumes, f fixes), binds, thms, cases, defs));
wenzelm@5819
  1200
wenzelm@11925
  1201
fun err_dups ctxt xs = raise CONTEXT ("Duplicate variable(s): " ^ commas_quote xs, ctxt);
wenzelm@11925
  1202
wenzelm@12130
  1203
val declare =
wenzelm@16031
  1204
  fold declare_term_syntax o
wenzelm@16031
  1205
  List.mapPartial (fn (_, NONE) => NONE | (x, SOME T) => SOME (Free (x, T)));
wenzelm@12130
  1206
wenzelm@12130
  1207
fun add_vars xs Ts ctxt =
wenzelm@12309
  1208
  let val xs' = Term.variantlist (map Syntax.skolem xs, map #2 (fixes_of ctxt)) in
wenzelm@12309
  1209
    ctxt
wenzelm@12309
  1210
    |> declare (xs' ~~ Ts)
wenzelm@12309
  1211
    |> map_fixes (fn fixes => (xs ~~ xs') @ fixes)
wenzelm@12130
  1212
  end;
wenzelm@11925
  1213
wenzelm@12130
  1214
fun add_vars_direct xs Ts ctxt =
wenzelm@12309
  1215
  ctxt
wenzelm@12309
  1216
  |> declare (xs ~~ Ts)
wenzelm@12309
  1217
  |> map_fixes (fn fixes =>
wenzelm@12130
  1218
    (case xs inter_string map #1 fixes of
wenzelm@12309
  1219
      [] => (xs ~~ xs) @ fixes
wenzelm@12130
  1220
    | dups => err_dups ctxt dups));
wenzelm@12130
  1221
wenzelm@11925
  1222
wenzelm@11925
  1223
fun gen_fix prep add raw_vars ctxt =
wenzelm@8096
  1224
  let
wenzelm@8096
  1225
    val (ctxt', varss) = foldl_map prep (ctxt, raw_vars);
skalberg@15570
  1226
    val vars = rev (List.concat (map (fn (xs, T) => map (rpair T) xs) varss));
wenzelm@12130
  1227
    val xs = map #1 vars;
wenzelm@12130
  1228
    val Ts = map #2 vars;
wenzelm@8096
  1229
  in
wenzelm@11925
  1230
    (case Library.duplicates xs of [] => () | dups => err_dups ctxt dups);
wenzelm@12130
  1231
    ctxt' |> add xs Ts
wenzelm@8096
  1232
  end;
wenzelm@5819
  1233
skalberg@15531
  1234
fun prep_type (x, NONE, SOME mx) = ([x], SOME (mixfix_type mx))
wenzelm@12576
  1235
  | prep_type (x, opt_T, _) = ([x], opt_T);
wenzelm@12576
  1236
wenzelm@8096
  1237
in
wenzelm@7679
  1238
wenzelm@11925
  1239
val fix = gen_fix read_vars add_vars;
wenzelm@11925
  1240
val fix_i = gen_fix cert_vars add_vars;
wenzelm@14720
  1241
wenzelm@14720
  1242
fun fix_direct liberal =
wenzelm@14720
  1243
  gen_fix (if liberal then cert_vars_liberal else cert_vars) add_vars_direct;
wenzelm@14720
  1244
wenzelm@14720
  1245
fun add_fixes decls = add_syntax decls o fix_direct false (map prep_type decls);
wenzelm@14720
  1246
fun add_fixes_liberal decls = add_syntax decls o fix_direct true (map prep_type decls);
wenzelm@8096
  1247
wenzelm@8096
  1248
end;
wenzelm@5819
  1249
wenzelm@12048
  1250
fun fix_frees ts ctxt =
wenzelm@12048
  1251
  let
skalberg@15570
  1252
    val frees = Library.foldl Term.add_frees ([], ts);
skalberg@15531
  1253
    fun new (x, T) = if is_fixed ctxt x then NONE else SOME ([x], SOME T);
skalberg@15570
  1254
  in fix_direct false (rev (List.mapPartial new frees)) ctxt end;
wenzelm@12016
  1255
wenzelm@6895
  1256
wenzelm@9291
  1257
(*Note: improper use may result in variable capture / dynamic scoping!*)
wenzelm@9291
  1258
fun bind_skolem ctxt xs =
wenzelm@9291
  1259
  let
skalberg@15531
  1260
    val ctxt' = ctxt |> fix_i [(xs, NONE)];
wenzelm@9291
  1261
    fun bind (t as Free (x, T)) =
wenzelm@9291
  1262
          if x mem_string xs then
skalberg@15531
  1263
            (case lookup_skolem ctxt' x of SOME x' => Free (x', T) | NONE => t)
wenzelm@9291
  1264
          else t
wenzelm@9291
  1265
      | bind (t $ u) = bind t $ bind u
wenzelm@9291
  1266
      | bind (Abs (x, T, t)) = Abs (x, T, bind t)
wenzelm@9291
  1267
      | bind a = a;
wenzelm@9291
  1268
  in bind end;
wenzelm@9291
  1269
wenzelm@9291
  1270
wenzelm@5819
  1271
wenzelm@8373
  1272
(** cases **)
wenzelm@8373
  1273
wenzelm@16147
  1274
fun apply_case ({fixes, assumes, binds}: RuleCases.T) ctxt =
wenzelm@16147
  1275
  let
wenzelm@16147
  1276
    fun bind (c, (x, T)) = (c |> fix_i [([x], SOME T)], bind_skolem c [x] (Free (x, T)));
wenzelm@16147
  1277
    val (ctxt', xs) = foldl_map bind (ctxt, fixes);
wenzelm@16147
  1278
    fun app t = Library.foldl Term.betapply (t, xs);
wenzelm@16147
  1279
  in (ctxt', (map (apsnd (Option.map app)) binds, map (apsnd (map app)) assumes)) end;
wenzelm@16147
  1280
wenzelm@16147
  1281
local
wenzelm@16147
  1282
wenzelm@11793
  1283
fun prep_case ctxt name xs {fixes, assumes, binds} =
wenzelm@11793
  1284
  let
wenzelm@15974
  1285
    fun replace (opt_x :: xs) ((y, T) :: ys) = (if_none opt_x y, T) :: replace xs ys
wenzelm@11793
  1286
      | replace [] ys = ys
wenzelm@11793
  1287
      | replace (_ :: _) [] = raise CONTEXT ("Too many parameters for case " ^ quote name, ctxt);
wenzelm@11793
  1288
  in
skalberg@15574
  1289
    if null (foldr Term.add_typ_tvars [] (map snd fixes)) andalso
skalberg@15574
  1290
      null (foldr Term.add_term_vars [] (List.concat (map snd assumes))) then
wenzelm@11793
  1291
        {fixes = replace xs fixes, assumes = assumes, binds = map drop_schematic binds}
wenzelm@11793
  1292
    else raise CONTEXT ("Illegal schematic variable(s) in case " ^ quote name, ctxt)
wenzelm@11793
  1293
  end;
wenzelm@8403
  1294
wenzelm@16147
  1295
fun rem_case name = remove (fn (x, (y, _)) => x = y) name;
wenzelm@16147
  1296
wenzelm@16147
  1297
fun add_case ("", _) cases = cases
wenzelm@16147
  1298
  | add_case (name, NONE) cases = rem_case name cases
wenzelm@16147
  1299
  | add_case (name, SOME c) cases = (name, c) :: rem_case name cases;
wenzelm@16147
  1300
wenzelm@16147
  1301
in
wenzelm@16147
  1302
wenzelm@11793
  1303
fun get_case (ctxt as Context {cases, ...}) name xs =
wenzelm@8426
  1304
  (case assoc (cases, name) of
skalberg@15531
  1305
    NONE => raise CONTEXT ("Unknown case: " ^ quote name, ctxt)
skalberg@15531
  1306
  | SOME c => prep_case ctxt name xs c);
wenzelm@8373
  1307
wenzelm@16147
  1308
fun add_cases xs = map_context (fn (thy, syntax, data, asms, binds, thms, cases, defs) =>
wenzelm@16147
  1309
  (thy, syntax, data, asms, binds, thms, fold add_case xs cases, defs));
wenzelm@8384
  1310
wenzelm@16147
  1311
end;
wenzelm@8373
  1312
wenzelm@8373
  1313
wenzelm@8373
  1314
wenzelm@10810
  1315
(** print context information **)
wenzelm@10810
  1316
wenzelm@10810
  1317
val verbose = ref false;
wenzelm@10810
  1318
fun verb f x = if ! verbose then f (x ()) else [];
wenzelm@10810
  1319
fun verb_single x = verb Library.single x;
wenzelm@10810
  1320
wenzelm@10810
  1321
fun setmp_verbose f x = Library.setmp verbose true f x;
wenzelm@10810
  1322
wenzelm@10810
  1323
fun pretty_items prt name items =
wenzelm@10810
  1324
  let
wenzelm@10810
  1325
    fun prt_itms (name, [x]) = Pretty.block [Pretty.str (name ^ ":"), Pretty.brk 1, prt x]
wenzelm@10810
  1326
      | prt_itms (name, xs) = Pretty.big_list (name ^ ":") (map prt xs);
wenzelm@10810
  1327
  in
wenzelm@10810
  1328
    if null items andalso not (! verbose) then []
wenzelm@10810
  1329
    else [Pretty.big_list name (map prt_itms items)]
wenzelm@10810
  1330
  end;
wenzelm@10810
  1331
wenzelm@10810
  1332
wenzelm@12072
  1333
(* local syntax *)
wenzelm@12072
  1334
wenzelm@12093
  1335
val print_syntax = Syntax.print_syntax o syn_of;
wenzelm@12072
  1336
wenzelm@12072
  1337
wenzelm@10810
  1338
(* term bindings *)
wenzelm@10810
  1339
wenzelm@10810
  1340
fun pretty_binds (ctxt as Context {binds, ...}) =
wenzelm@10810
  1341
  let
wenzelm@12057
  1342
    fun prt_bind (xi, (t, T)) = pretty_term ctxt (Logic.mk_equals (Var (xi, T), t));
wenzelm@10810
  1343
  in
wenzelm@15758
  1344
    if Vartab.is_empty binds andalso not (! verbose) then []
wenzelm@15758
  1345
    else [Pretty.big_list "term bindings:" (map prt_bind (Vartab.dest binds))]
wenzelm@10810
  1346
  end;
wenzelm@10810
  1347
wenzelm@10810
  1348
val print_binds = Pretty.writeln o Pretty.chunks o pretty_binds;
wenzelm@10810
  1349
wenzelm@10810
  1350
wenzelm@10810
  1351
(* local theorems *)
wenzelm@10810
  1352
wenzelm@13278
  1353
fun pretty_lthms (ctxt as Context {thms = (_, space, tab, _), ...}) =
wenzelm@16147
  1354
  pretty_items (pretty_thm ctxt) "facts:" (NameSpace.extern_table space tab);
wenzelm@10810
  1355
wenzelm@12057
  1356
val print_lthms = Pretty.writeln o Pretty.chunks o pretty_lthms;
wenzelm@10810
  1357
wenzelm@10810
  1358
wenzelm@10810
  1359
(* local contexts *)
wenzelm@10810
  1360
wenzelm@10810
  1361
fun pretty_cases (ctxt as Context {cases, ...}) =
wenzelm@10810
  1362
  let
wenzelm@12057
  1363
    val prt_term = pretty_term ctxt;
wenzelm@12057
  1364
wenzelm@10810
  1365
    fun prt_let (xi, t) = Pretty.block
wenzelm@10818
  1366
      [Pretty.quote (prt_term (Var (xi, Term.fastype_of t))), Pretty.str " =", Pretty.brk 1,
wenzelm@10810
  1367
        Pretty.quote (prt_term t)];
wenzelm@10810
  1368
wenzelm@13425
  1369
    fun prt_asm (a, ts) = Pretty.block (Pretty.breaks
wenzelm@13425
  1370
      ((if a = "" then [] else [Pretty.str (a ^ ":")]) @ map (Pretty.quote o prt_term) ts));
wenzelm@13425
  1371
wenzelm@10810
  1372
    fun prt_sect _ _ _ [] = []
wenzelm@10810
  1373
      | prt_sect s sep prt xs = [Pretty.block (Pretty.breaks (Pretty.str s ::
skalberg@15570
  1374
            List.concat (Library.separate sep (map (Library.single o prt) xs))))];
wenzelm@10810
  1375
wenzelm@10830
  1376
    fun prt_case (name, (fixes, (lets, asms))) = Pretty.block (Pretty.fbreaks
wenzelm@10810
  1377
      (Pretty.str (name ^ ":") ::
wenzelm@11915
  1378
        prt_sect "fix" [] (Pretty.str o fst) fixes @
wenzelm@10810
  1379
        prt_sect "let" [Pretty.str "and"] prt_let
skalberg@15570
  1380
          (List.mapPartial (fn (xi, SOME t) => SOME (xi, t) | _ => NONE) lets) @
wenzelm@13425
  1381
        (if forall (null o #2) asms then []
wenzelm@13425
  1382
          else prt_sect "assume" [Pretty.str "and"] prt_asm asms)));
wenzelm@10810
  1383
  in
wenzelm@10810
  1384
    if null cases andalso not (! verbose) then []
wenzelm@10830
  1385
    else [Pretty.big_list "cases:"
wenzelm@16147
  1386
      (map (prt_case o apsnd (fn c => (#fixes c, #2 (apply_case c ctxt)))) (rev cases))]
wenzelm@10810
  1387
  end;
wenzelm@10810
  1388
wenzelm@10810
  1389
val print_cases = Pretty.writeln o Pretty.chunks o pretty_cases;
wenzelm@10810
  1390
wenzelm@10810
  1391
wenzelm@12057
  1392
(* core context *)
wenzelm@10810
  1393
wenzelm@10810
  1394
val prems_limit = ref 10;
wenzelm@10810
  1395
wenzelm@12057
  1396
fun pretty_asms ctxt =
wenzelm@10810
  1397
  let
wenzelm@12057
  1398
    val prt_term = pretty_term ctxt;
wenzelm@12057
  1399
wenzelm@12093
  1400
    (*structures*)
wenzelm@12093
  1401
    val (_, structs, _) = syntax_of ctxt;
wenzelm@12093
  1402
    val prt_structs = if null structs then []
wenzelm@12093
  1403
      else [Pretty.block (Pretty.str "structures:" :: Pretty.brk 1 ::
wenzelm@12093
  1404
        Pretty.commas (map Pretty.str structs))];
wenzelm@12093
  1405
wenzelm@12057
  1406
    (*fixes*)
wenzelm@12057
  1407
    fun prt_fix (x, x') =
wenzelm@12057
  1408
      if x = x' then Pretty.str x
wenzelm@12057
  1409
      else Pretty.block [Pretty.str x, Pretty.str " =", Pretty.brk 1, prt_term (Syntax.free x')];
wenzelm@12093
  1410
    val fixes = rev (filter_out
wenzelm@12093
  1411
      ((can Syntax.dest_internal o #1) orf (fn (_, x') => x' mem_string structs)) (fixes_of ctxt));
wenzelm@12093
  1412
    val prt_fixes = if null fixes then []
wenzelm@12093
  1413
      else [Pretty.block (Pretty.str "fixed variables:" :: Pretty.brk 1 ::
wenzelm@12093
  1414
        Pretty.commas (map prt_fix fixes))];
wenzelm@12057
  1415
wenzelm@12057
  1416
    (*prems*)
wenzelm@10810
  1417
    val limit = ! prems_limit;
wenzelm@10810
  1418
    val prems = prems_of ctxt;
wenzelm@10810
  1419
    val len = length prems;
wenzelm@12093
  1420
    val prt_prems = if null prems then []
wenzelm@12093
  1421
      else [Pretty.big_list "prems:" ((if len <= limit then [] else [Pretty.str "..."]) @
wenzelm@12093
  1422
        map (pretty_thm ctxt) (Library.drop (len - limit, prems)))];
wenzelm@12093
  1423
wenzelm@12093
  1424
  in prt_structs @ prt_fixes @ prt_prems end;
wenzelm@10810
  1425
wenzelm@10810
  1426
wenzelm@10810
  1427
(* main context *)
wenzelm@10810
  1428
wenzelm@12291
  1429
fun pretty_context (ctxt as Context {cases, defs = (types, sorts, used, _), ...}) =
wenzelm@10810
  1430
  let
wenzelm@12057
  1431
    val prt_term = pretty_term ctxt;
wenzelm@12057
  1432
    val prt_typ = pretty_typ ctxt;
wenzelm@12057
  1433
    val prt_sort = pretty_sort ctxt;
wenzelm@10810
  1434
wenzelm@10810
  1435
    (*theory*)
wenzelm@12057
  1436
    val pretty_thy = Pretty.block
wenzelm@12057
  1437
      [Pretty.str "Theory:", Pretty.brk 1, Sign.pretty_sg (sign_of ctxt)];
wenzelm@10810
  1438
wenzelm@10810
  1439
    (*defaults*)
wenzelm@10810
  1440
    fun prt_atom prt prtT (x, X) = Pretty.block
wenzelm@10810
  1441
      [prt x, Pretty.str " ::", Pretty.brk 1, prtT X];
wenzelm@10810
  1442
wenzelm@10810
  1443
    fun prt_var (x, ~1) = prt_term (Syntax.free x)
wenzelm@10810
  1444
      | prt_var xi = prt_term (Syntax.var xi);
wenzelm@10810
  1445
wenzelm@10810
  1446
    fun prt_varT (x, ~1) = prt_typ (TFree (x, []))
wenzelm@10810
  1447
      | prt_varT xi = prt_typ (TVar (xi, []));
wenzelm@10810
  1448
wenzelm@10810
  1449
    val prt_defT = prt_atom prt_var prt_typ;
wenzelm@10810
  1450
    val prt_defS = prt_atom prt_varT prt_sort;
wenzelm@10810
  1451
  in
wenzelm@10810
  1452
    verb_single (K pretty_thy) @
wenzelm@12057
  1453
    pretty_asms ctxt @
wenzelm@10810
  1454
    verb pretty_binds (K ctxt) @
wenzelm@12057
  1455
    verb pretty_lthms (K ctxt) @
wenzelm@10810
  1456
    verb pretty_cases (K ctxt) @
wenzelm@10810
  1457
    verb_single (fn () => Pretty.big_list "type constraints:" (map prt_defT (Vartab.dest types))) @
wenzelm@10810
  1458
    verb_single (fn () => Pretty.big_list "default sorts:" (map prt_defS (Vartab.dest sorts))) @
wenzelm@10810
  1459
    verb_single (fn () => Pretty.strs ("used type variable names:" :: used))
wenzelm@10810
  1460
  end;
wenzelm@10810
  1461
wenzelm@5819
  1462
end;