src/Pure/Isar/proof_context.ML
author wenzelm
Fri Nov 25 18:58:42 2005 +0100 (2005-11-25 ago)
changeset 18255 5ef79b75a002
parent 18211 8f3973d3b2f0
child 18310 b00c9120f6bd
permissions -rw-r--r--
revert_skolem: fall back on Syntax.deskolem;
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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 (*= Context.proof*)
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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 -> theory    (*obsolete*)
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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 assms_of: context -> term 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 init: theory -> context
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  val transfer: theory -> context -> 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 pretty_proof: context -> Proofterm.proof -> Pretty.T
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  val pretty_proof_of: context -> bool -> thm -> Pretty.T
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  val string_of_typ: context -> typ -> string
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  val string_of_term: context -> term -> string
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  val string_of_thm: context -> thm -> 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_syntax: context -> string -> typ
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  val read_typ_abbrev: context -> string -> typ
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  val cert_typ: context -> typ -> typ
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  val cert_typ_syntax: context -> typ -> typ
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  val cert_typ_abbrev: context -> typ -> typ
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  val get_skolem: context -> string -> string
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  val revert_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 export: context -> context -> thm -> thm
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  val exports: context -> context -> thm -> thm Seq.seq
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  val goal_exports: context -> context -> thm -> thm Seq.seq
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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 fact_tac: thm list -> int -> tactic
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  val some_fact_tac: context -> int -> tactic
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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_thm: 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_thms: string * thm list option -> 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 -> (bstring * thm list) list * context
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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 -> (bstring * thm list) list * context
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  val export_assume: exporter
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  val export_presume: 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 -> (bstring * thm list) list * context
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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 -> (bstring * thm list) list * context
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  val mk_def: context -> string * term -> term
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  val cert_def: context -> term -> string * term
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  val export_def: exporter
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  val add_def: string * term -> context -> ((string * typ) * thm) * context
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  val add_view: context -> cterm list -> context -> context
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  val export_view: cterm list -> context -> context -> thm -> thm
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  val read_vars: (string list * string option) -> context -> (string list * typ option) * context
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  val cert_vars: (string list * typ option) -> context -> (string list * typ option) * context
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  val read_vars_liberal: (string list * string option) -> context ->
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    (string list * typ option) * context
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  val cert_vars_liberal: (string list * typ option) -> context ->
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    (string list * typ option) * context
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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 auto_fix: context * (term list list * 'a) -> context * (term list list * 'a)
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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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    -> ((indexname * term option) list * (string * term list) list) * context
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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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structure ProofContext: PROOF_CONTEXT =
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struct
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(** generic proof contexts **)
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type context = Context.proof;
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exception CONTEXT = Context.PROOF;
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val theory_of = Context.theory_of_proof;
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val sign_of = theory_of;
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val init = Context.init_proof;
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(** Isar proof context information **)
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type exporter = bool -> cterm list -> thm -> thm Seq.seq;
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datatype ctxt =
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  Ctxt of
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   {syntax: (Syntax.syntax * Syntax.syntax * (Syntax.syntax -> Syntax.syntax)) *
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      string list * string list,                (*global/local syntax with structs and mixfixed*)
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    asms:
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      ((cterm list * exporter) list *           (*assumes and views: 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 *                    (*local thms*)
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      thm list NameSpace.table * FactIndex.T,
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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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fun make_ctxt (syntax, asms, binds, thms, cases, defs) =
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  Ctxt {syntax = syntax, asms = asms, binds = binds, thms = thms, cases = cases, defs = defs};
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structure ContextData = ProofDataFun
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(struct
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  val name = "Isar/context";
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  type T = ctxt;
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  fun init thy =
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    make_ctxt (((Sign.syn_of thy, Sign.syn_of thy, I), [], []), (([], []), []),
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      Vartab.empty, (NameSpace.default_naming, NameSpace.empty_table, FactIndex.empty), [],
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      (Vartab.empty, Vartab.empty, [], Symtab.empty));
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  fun print _ _ = ();
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end);
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val _ = Context.add_setup [ContextData.init];
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fun rep_context ctxt = ContextData.get ctxt |> (fn Ctxt args => args);
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fun map_context f = ContextData.map (fn Ctxt {syntax, asms, binds, thms, cases, defs} =>
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  make_ctxt (f (syntax, asms, binds, thms, cases, defs)));
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val syntax_of = #syntax o rep_context;
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val assumptions_of = #1 o #1 o #asms o rep_context;
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val assms_of = map Thm.term_of o List.concat o map #1 o assumptions_of;
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val prems_of = List.concat o map #2 o #2 o #1 o #asms o rep_context;
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val fixes_of = #2 o #asms o rep_context;
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val fixed_names_of = map #2 o fixes_of;
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val binds_of = #binds o rep_context;
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val thms_of = #thms o rep_context;
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val fact_index_of = #3 o thms_of;
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val cases_of = #cases o rep_context;
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val defaults_of = #defs o rep_context;
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val type_occs_of = #4 o defaults_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 x = Vartab.defined (#1 (defaults_of ctxt)) (x, ~1) orelse is_fixed ctxt x;
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(** local syntax **)
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val fixedN = "\\<^fixed>";
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val structN = "\\<^struct>";
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(* translation functions *)
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fun fixed_tr x = (fixedN ^ x, curry Term.list_comb (Syntax.free x));
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fun context_tr' ctxt =
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  let
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    val (_, structs, mixfixed) = syntax_of ctxt;
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    fun tr' (t $ u) = tr' t $ tr' u
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      | tr' (Abs (x, T, t)) = Abs (x, T, tr' t)
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      | tr' (t as Free (x, T)) =
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          let val i = Library.find_index_eq x structs + 1 in
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            if i = 0 andalso x mem_string mixfixed then Const (fixedN ^ x, T)
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            else if i = 1 andalso not (! show_structs) then
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              Syntax.const "_struct" $ Syntax.const "_indexdefault"
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            else t
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          end
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      | tr' a = a;
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  in tr' end;
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(* add syntax *)
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fun mixfix_type mx = replicate (Syntax.mixfix_args mx) TypeInfer.logicT ---> TypeInfer.logicT;
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local
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fun mixfix x NONE mx = (fixedN ^ x, mixfix_type mx, Syntax.fix_mixfix x mx)
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  | mixfix x (SOME T) mx = (fixedN ^ x, T, Syntax.fix_mixfix x mx);
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fun prep_mixfix (_, _, NONE) = NONE
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  | prep_mixfix (x, opt_T, SOME mx) = SOME (mixfix x opt_T mx);
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fun prep_mixfix' (_, _, NONE) = NONE
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  | prep_mixfix' (x, _, SOME Syntax.NoSyn) = NONE
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  | prep_mixfix' (x, opt_T, _) = SOME (x, mixfix x opt_T (Syntax.literal x));
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fun prep_struct (x, _, NONE) = SOME x
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  | prep_struct _ = NONE;
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fun mk trs = map Syntax.mk_trfun trs;
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fun extend_syntax thy extend (global_syn, syn, mk_syn) =
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  let
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    val thy_syn = Sign.syn_of thy;
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    val mk_syn' = extend o mk_syn;
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    val (global_syn', syn') =
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      if Syntax.eq_syntax (global_syn, thy_syn)
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      then (global_syn, extend syn)
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      else (thy_syn, mk_syn' thy_syn);    (*potentially expensive*)
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  in (global_syn', syn', mk_syn') end;
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in
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fun add_syntax decls ctxt = ctxt |> map_context (fn (syntax, asms, binds, thms, cases, defs) =>
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  let
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    val (syns, structs, mixfixed) = syntax;
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    val thy = theory_of ctxt;
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    val is_logtype = Sign.is_logtype thy;
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    val structs' = structs @ List.mapPartial prep_struct decls;
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    val mxs = List.mapPartial prep_mixfix decls;
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    val (fixed, mxs_output) = Library.split_list (List.mapPartial prep_mixfix' decls);
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   309
    val trs = map fixed_tr fixed;
wenzelm@12093
   310
wenzelm@17072
   311
    val extend =
wenzelm@17072
   312
      Syntax.extend_const_gram is_logtype ("", false) mxs_output
wenzelm@17072
   313
      #> Syntax.extend_const_gram is_logtype ("", true) mxs
wenzelm@17072
   314
      #> Syntax.extend_trfuns ([], mk trs, [], []);
wenzelm@17072
   315
    val syns' = extend_syntax thy extend syns;
wenzelm@17072
   316
  in ((syns', structs', fixed @ mixfixed), asms, binds, thms, cases, defs) end);
wenzelm@17072
   317
wenzelm@17072
   318
fun syn_of' thy ctxt =
wenzelm@16540
   319
  let
wenzelm@17072
   320
    val (syns, structs, _) = syntax_of ctxt;
wenzelm@16540
   321
    val (atrs, trs, trs', atrs') = Syntax.struct_trfuns structs;
wenzelm@17072
   322
    val extend = Syntax.extend_trfuns (mk atrs, mk trs, mk trs', mk atrs');
wenzelm@17072
   323
  in #2 (extend_syntax thy extend syns) end;
wenzelm@17072
   324
wenzelm@17072
   325
fun syn_of ctxt = syn_of' (theory_of ctxt) ctxt;
wenzelm@14697
   326
wenzelm@12093
   327
end;
wenzelm@12093
   328
wenzelm@17072
   329
fun transfer thy = add_syntax [] o Context.transfer_proof thy;
wenzelm@17072
   330
wenzelm@12093
   331
wenzelm@12093
   332
wenzelm@14828
   333
(** pretty printing **)
wenzelm@14828
   334
wenzelm@17072
   335
fun pretty_term' thy ctxt t = Sign.pretty_term' (syn_of' thy ctxt) thy (context_tr' ctxt t);
wenzelm@17072
   336
fun pretty_term ctxt t = pretty_term' (theory_of ctxt) ctxt (context_tr' ctxt t);
wenzelm@16458
   337
fun pretty_typ ctxt T = Sign.pretty_typ (theory_of ctxt) T;
wenzelm@16458
   338
fun pretty_sort ctxt S = Sign.pretty_sort (theory_of ctxt) S;
wenzelm@16458
   339
fun pretty_classrel ctxt cs = Sign.pretty_classrel (theory_of ctxt) cs;
wenzelm@16458
   340
fun pretty_arity ctxt ar = Sign.pretty_arity (theory_of ctxt) ar;
wenzelm@14828
   341
wenzelm@14974
   342
fun pp ctxt = Pretty.pp (pretty_term ctxt, pretty_typ ctxt, pretty_sort ctxt,
wenzelm@14974
   343
  pretty_classrel ctxt, pretty_arity ctxt);
wenzelm@14828
   344
wenzelm@17451
   345
fun pretty_thm ctxt th =
wenzelm@17451
   346
  Display.pretty_thm_aux (pp ctxt) false true (assms_of ctxt) th;
wenzelm@14828
   347
wenzelm@14828
   348
fun pretty_thms ctxt [th] = pretty_thm ctxt th
wenzelm@14828
   349
  | pretty_thms ctxt ths = Pretty.blk (0, Pretty.fbreaks (map (pretty_thm ctxt) ths));
wenzelm@14828
   350
wenzelm@14828
   351
fun pretty_fact ctxt ("", ths) = pretty_thms ctxt ths
wenzelm@14828
   352
  | pretty_fact ctxt (a, [th]) =
wenzelm@14828
   353
      Pretty.block [Pretty.str (a ^ ":"), Pretty.brk 1, pretty_thm ctxt th]
wenzelm@14828
   354
  | pretty_fact ctxt (a, ths) =
wenzelm@14828
   355
      Pretty.block (Pretty.fbreaks (Pretty.str (a ^ ":") :: map (pretty_thm ctxt) ths));
wenzelm@14828
   356
wenzelm@17072
   357
fun pretty_proof ctxt prf =
wenzelm@17072
   358
  pretty_term' (ProofSyntax.proof_syntax prf (theory_of ctxt)) ctxt
wenzelm@17072
   359
    (ProofSyntax.term_of_proof prf);
wenzelm@17072
   360
wenzelm@17072
   361
fun pretty_proof_of ctxt full th =
wenzelm@17072
   362
  pretty_proof ctxt (ProofSyntax.proof_of full th);
wenzelm@17072
   363
wenzelm@17860
   364
val string_of_typ = Pretty.string_of oo pretty_typ;
wenzelm@17860
   365
val string_of_term = Pretty.string_of oo pretty_term;
wenzelm@17860
   366
val string_of_thm = Pretty.string_of oo pretty_thm;
wenzelm@17860
   367
wenzelm@14828
   368
wenzelm@14828
   369
wenzelm@7663
   370
(** default sorts and types **)
wenzelm@7663
   371
wenzelm@17412
   372
val def_sort = Vartab.lookup o #2 o defaults_of;
wenzelm@7663
   373
wenzelm@16540
   374
fun def_type ctxt pattern xi =
wenzelm@16540
   375
  let val {binds, defs = (types, _, _, _), ...} = rep_context ctxt in
wenzelm@17412
   376
    (case Vartab.lookup types xi of
wenzelm@16540
   377
      NONE =>
wenzelm@16540
   378
        if pattern then NONE
wenzelm@17412
   379
        else Vartab.lookup binds xi |> Option.map (TypeInfer.polymorphicT o #2)
wenzelm@16540
   380
    | some => some)
wenzelm@16540
   381
  end;
wenzelm@7663
   382
wenzelm@17412
   383
fun default_type ctxt x = Vartab.lookup (#1 (defaults_of ctxt)) (x, ~1);
wenzelm@16540
   384
val used_types = #3 o defaults_of;
wenzelm@12414
   385
wenzelm@7663
   386
wenzelm@5819
   387
wenzelm@5819
   388
(** prepare types **)
wenzelm@5819
   389
wenzelm@9504
   390
local
wenzelm@9504
   391
wenzelm@9504
   392
fun read_typ_aux read ctxt s =
wenzelm@16458
   393
  transform_error (read (syn_of ctxt) (theory_of ctxt, def_sort ctxt)) s
wenzelm@7663
   394
    handle ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt);
wenzelm@5819
   395
wenzelm@10554
   396
fun cert_typ_aux cert ctxt raw_T =
wenzelm@16458
   397
  cert (theory_of ctxt) raw_T
wenzelm@10554
   398
    handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
wenzelm@9504
   399
wenzelm@9504
   400
in
wenzelm@9504
   401
wenzelm@16348
   402
val read_typ        = read_typ_aux Sign.read_typ';
wenzelm@16348
   403
val read_typ_syntax = read_typ_aux Sign.read_typ_syntax';
wenzelm@16348
   404
val read_typ_abbrev = read_typ_aux Sign.read_typ_abbrev';
wenzelm@16348
   405
val cert_typ        = cert_typ_aux Sign.certify_typ;
wenzelm@16348
   406
val cert_typ_syntax = cert_typ_aux Sign.certify_typ_syntax;
wenzelm@16348
   407
val cert_typ_abbrev = cert_typ_aux Sign.certify_typ_abbrev;
wenzelm@9504
   408
wenzelm@9504
   409
end;
wenzelm@9504
   410
wenzelm@5819
   411
wenzelm@7679
   412
(* internalize Skolem constants *)
wenzelm@7679
   413
wenzelm@17184
   414
val lookup_skolem = AList.lookup (op =) o fixes_of;
wenzelm@18187
   415
fun get_skolem ctxt x = the_default x (lookup_skolem ctxt x);
wenzelm@7679
   416
wenzelm@12504
   417
fun no_skolem internal ctxt x =
wenzelm@9291
   418
  if can Syntax.dest_skolem x then
wenzelm@7679
   419
    raise CONTEXT ("Illegal reference to internal Skolem constant: " ^ quote x, ctxt)
wenzelm@12504
   420
  else if not internal andalso can Syntax.dest_internal x then
wenzelm@9291
   421
    raise CONTEXT ("Illegal reference to internal variable: " ^ quote x, ctxt)
wenzelm@7679
   422
  else x;
wenzelm@7679
   423
wenzelm@14720
   424
fun intern_skolem ctxt internal =
wenzelm@7679
   425
  let
wenzelm@7679
   426
    fun intern (t as Free (x, T)) =
wenzelm@14720
   427
          if internal x then t
wenzelm@14720
   428
          else
wenzelm@14720
   429
            (case lookup_skolem ctxt (no_skolem false ctxt x) of
skalberg@15531
   430
              SOME x' => Free (x', T)
skalberg@15531
   431
            | NONE => t)
wenzelm@7679
   432
      | intern (t $ u) = intern t $ intern u
wenzelm@7679
   433
      | intern (Abs (x, T, t)) = Abs (x, T, intern t)
wenzelm@7679
   434
      | intern a = a;
wenzelm@7679
   435
  in intern end;
wenzelm@7679
   436
wenzelm@7679
   437
wenzelm@18187
   438
(* externalize Skolem constants -- approximation only! *)
wenzelm@18187
   439
wenzelm@18255
   440
fun rev_skolem ctxt =
wenzelm@18187
   441
  let val rev_fixes = map Library.swap (fixes_of ctxt)
wenzelm@18187
   442
  in AList.lookup (op =) rev_fixes end;
wenzelm@9133
   443
wenzelm@18255
   444
fun revert_skolem ctxt x =
wenzelm@18255
   445
  (case rev_skolem ctxt x of
wenzelm@18255
   446
    SOME x' => x'
wenzelm@18255
   447
  | NONE => Syntax.deskolem x);
wenzelm@18255
   448
wenzelm@9133
   449
fun extern_skolem ctxt =
wenzelm@9133
   450
  let
wenzelm@18255
   451
    val revert = rev_skolem ctxt;
wenzelm@9133
   452
    fun extern (t as Free (x, T)) =
wenzelm@18187
   453
        (case revert x of
wenzelm@18187
   454
          SOME x' => Free (if lookup_skolem ctxt x' = SOME x then x' else NameSpace.hidden x', T)
wenzelm@18187
   455
        | NONE => t)
wenzelm@9133
   456
      | extern (t $ u) = extern t $ extern u
wenzelm@9133
   457
      | extern (Abs (x, T, t)) = Abs (x, T, extern t)
wenzelm@9133
   458
      | extern a = a;
wenzelm@9133
   459
  in extern end
wenzelm@9133
   460
wenzelm@8096
   461
wenzelm@18187
   462
wenzelm@5819
   463
(** prepare terms and propositions **)
wenzelm@5819
   464
wenzelm@5819
   465
(*
wenzelm@16501
   466
  (1) read / certify wrt. theory of context
wenzelm@5819
   467
  (2) intern Skolem constants
wenzelm@5819
   468
  (3) expand term bindings
wenzelm@5819
   469
*)
wenzelm@5819
   470
wenzelm@5819
   471
wenzelm@16501
   472
(* read wrt. theory *)     (*exception ERROR*)
wenzelm@5819
   473
wenzelm@16458
   474
fun read_def_termTs freeze pp syn thy (types, sorts, used) sTs =
wenzelm@16458
   475
  Sign.read_def_terms' pp (Sign.is_logtype thy) syn (thy, types, sorts) used freeze sTs;
wenzelm@5874
   476
wenzelm@16458
   477
fun read_def_termT freeze pp syn thy defs sT =
wenzelm@16458
   478
  apfst hd (read_def_termTs freeze pp syn thy defs [sT]);
wenzelm@14828
   479
wenzelm@16458
   480
fun read_term_thy freeze pp syn thy defs s =
wenzelm@16458
   481
  #1 (read_def_termT freeze pp syn thy defs (s, TypeInfer.logicT));
wenzelm@5874
   482
wenzelm@16458
   483
fun read_prop_thy freeze pp syn thy defs s =
wenzelm@16458
   484
  #1 (read_def_termT freeze pp syn thy defs (s, propT));
wenzelm@12072
   485
wenzelm@16458
   486
fun read_terms_thy freeze pp syn thy defs =
wenzelm@16458
   487
  #1 o read_def_termTs freeze pp syn thy defs o map (rpair TypeInfer.logicT);
wenzelm@12072
   488
wenzelm@16458
   489
fun read_props_thy freeze pp syn thy defs =
wenzelm@16458
   490
  #1 o read_def_termTs freeze pp syn thy defs o map (rpair propT);
wenzelm@5819
   491
wenzelm@5819
   492
wenzelm@5819
   493
(* norm_term *)
wenzelm@5819
   494
wenzelm@5819
   495
(*beta normal form for terms (not eta normal form), chase variables in
wenzelm@5819
   496
  bindings environment (code taken from Pure/envir.ML)*)
wenzelm@5819
   497
wenzelm@8616
   498
fun unifyT ctxt (T, U) =
wenzelm@8616
   499
  let val maxidx = Int.max (Term.maxidx_of_typ T, Term.maxidx_of_typ U)
wenzelm@16948
   500
  in #1 (Sign.typ_unify (theory_of ctxt) (T, U) (Vartab.empty, maxidx)) end;
wenzelm@8616
   501
wenzelm@16540
   502
fun norm_term ctxt schematic =
wenzelm@5819
   503
  let
wenzelm@5819
   504
    (*raised when norm has no effect on a term, to do sharing instead of copying*)
wenzelm@5819
   505
    exception SAME;
wenzelm@5819
   506
wenzelm@16540
   507
    val binds = binds_of ctxt;
wenzelm@5819
   508
    fun norm (t as Var (xi, T)) =
wenzelm@17412
   509
          (case Vartab.lookup binds xi of
wenzelm@15758
   510
            SOME (u, U) =>
wenzelm@8616
   511
              let
wenzelm@8616
   512
                val env = unifyT ctxt (T, U) handle Type.TUNIFY =>
ballarin@14174
   513
                  raise TYPE ("norm_term: ill-typed variable assignment", [T, U], [t, u]);
berghofe@15798
   514
                val u' = Envir.subst_TVars env u;
wenzelm@8616
   515
              in norm u' handle SAME => u' end
wenzelm@15758
   516
          | NONE =>
wenzelm@10554
   517
            if schematic then raise SAME
wenzelm@10554
   518
            else raise CONTEXT ("Unbound schematic variable: " ^ Syntax.string_of_vname xi, ctxt))
wenzelm@5819
   519
      | norm (Abs (a, T, body)) =  Abs (a, T, norm body)
wenzelm@5819
   520
      | norm (Abs (_, _, body) $ t) = normh (subst_bound (t, body))
wenzelm@5819
   521
      | norm (f $ t) =
wenzelm@5819
   522
          ((case norm f of
wenzelm@5819
   523
            Abs (_, _, body) => normh (subst_bound (t, body))
wenzelm@5819
   524
          | nf => nf $ (norm t handle SAME => t)) handle SAME => f $ norm t)
wenzelm@5819
   525
      | norm _ =  raise SAME
wenzelm@5819
   526
    and normh t = norm t handle SAME => t
wenzelm@5819
   527
  in normh end;
wenzelm@5819
   528
wenzelm@5819
   529
wenzelm@6550
   530
(* dummy patterns *)
wenzelm@6550
   531
wenzelm@9540
   532
fun prepare_dummies t = #2 (Term.replace_dummy_patterns (1, t));
wenzelm@6762
   533
wenzelm@9540
   534
fun reject_dummies ctxt t = Term.no_dummy_patterns t
wenzelm@9540
   535
  handle TERM _ => raise CONTEXT ("Illegal dummy pattern(s) in term", ctxt);
wenzelm@6550
   536
wenzelm@6550
   537
wenzelm@5819
   538
(* read terms *)
wenzelm@5819
   539
wenzelm@10554
   540
local
wenzelm@10554
   541
skalberg@15531
   542
fun append_env e1 e2 x = (case e2 x of NONE => e1 x | some => some);
wenzelm@14720
   543
wenzelm@16031
   544
fun gen_read' read app pattern schematic
wenzelm@14720
   545
    ctxt internal more_types more_sorts more_used s =
ballarin@14174
   546
  let
wenzelm@14720
   547
    val types = append_env (def_type ctxt pattern) more_types;
wenzelm@14720
   548
    val sorts = append_env (def_sort ctxt) more_sorts;
wenzelm@14720
   549
    val used = used_types ctxt @ more_used;
ballarin@14174
   550
  in
wenzelm@16458
   551
    (transform_error (read (pp ctxt) (syn_of ctxt) (theory_of ctxt) (types, sorts, used)) s
ballarin@14174
   552
      handle TERM (msg, _) => raise CONTEXT (msg, ctxt)
wenzelm@14720
   553
        | ERROR_MESSAGE msg => raise CONTEXT (msg, ctxt))
wenzelm@14720
   554
    |> app (intern_skolem ctxt internal)
wenzelm@14720
   555
    |> app (if pattern then I else norm_term ctxt schematic)
wenzelm@16031
   556
    |> app (if pattern then prepare_dummies else reject_dummies ctxt)
wenzelm@14720
   557
  end;
wenzelm@14720
   558
wenzelm@16031
   559
fun gen_read read app pattern schematic ctxt =
wenzelm@16031
   560
  gen_read' read app pattern schematic ctxt (K false) (K NONE) (K NONE) [];
wenzelm@14720
   561
wenzelm@10554
   562
in
wenzelm@10554
   563
wenzelm@16031
   564
val read_termTs           = gen_read' (read_def_termTs false) (apfst o map) false false;
wenzelm@16031
   565
val read_termTs_schematic = gen_read' (read_def_termTs false) (apfst o map) false true;
wenzelm@8096
   566
wenzelm@14720
   567
fun read_term_pats T ctxt =
wenzelm@16031
   568
  #1 o gen_read (read_def_termTs false) (apfst o map) true false ctxt o map (rpair T);
wenzelm@8096
   569
val read_prop_pats = read_term_pats propT;
wenzelm@8096
   570
wenzelm@14720
   571
fun read_term_liberal ctxt =
wenzelm@16458
   572
  gen_read' (read_term_thy true) I false false ctxt (K true) (K NONE) (K NONE) [];
wenzelm@14720
   573
wenzelm@16458
   574
val read_term              = gen_read (read_term_thy true) I false false;
wenzelm@16458
   575
val read_prop              = gen_read (read_prop_thy true) I false false;
wenzelm@16458
   576
val read_prop_schematic    = gen_read (read_prop_thy true) I false true;
wenzelm@16458
   577
val read_terms             = gen_read (read_terms_thy true) map false false;
wenzelm@16458
   578
fun read_props schematic   = gen_read (read_props_thy true) map false schematic;
wenzelm@5819
   579
wenzelm@10554
   580
end;
wenzelm@10554
   581
wenzelm@5819
   582
wenzelm@5819
   583
(* certify terms *)
wenzelm@5819
   584
wenzelm@10554
   585
local
wenzelm@10554
   586
wenzelm@14720
   587
fun gen_cert cert pattern schematic ctxt t = t
wenzelm@14720
   588
  |> (if pattern then I else norm_term ctxt schematic)
wenzelm@16458
   589
  |> (fn t' => cert (pp ctxt) (theory_of ctxt) t'
wenzelm@16501
   590
    handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt)
wenzelm@16501
   591
      | TERM (msg, _) => raise CONTEXT (msg, ctxt));
wenzelm@16501
   592
wenzelm@16501
   593
val certify_term = #1 ooo Sign.certify_term;
wenzelm@16501
   594
val certify_prop = #1 ooo Sign.certify_prop;
wenzelm@5819
   595
wenzelm@10554
   596
in
wenzelm@8096
   597
wenzelm@16501
   598
val cert_term = gen_cert certify_term false false;
wenzelm@16501
   599
val cert_prop = gen_cert certify_prop false false;
wenzelm@16501
   600
val cert_props = map oo gen_cert certify_prop false;
wenzelm@10554
   601
wenzelm@16501
   602
fun cert_term_pats _ = map o gen_cert certify_term true false;
wenzelm@16501
   603
val cert_prop_pats = map o gen_cert certify_prop true false;
wenzelm@10554
   604
wenzelm@10554
   605
end;
wenzelm@5819
   606
wenzelm@5819
   607
wenzelm@5819
   608
(* declare terms *)
wenzelm@5819
   609
wenzelm@10381
   610
local
wenzelm@10381
   611
wenzelm@16861
   612
val ins_types = fold_aterms
wenzelm@17412
   613
  (fn Free (x, T) => Vartab.update ((x, ~1), T)
wenzelm@17412
   614
    | Var v => Vartab.update v
wenzelm@16861
   615
    | _ => I);
wenzelm@5819
   616
wenzelm@16861
   617
val ins_sorts = fold_types (fold_atyps
wenzelm@17412
   618
  (fn TFree (x, S) => Vartab.update ((x, ~1), S)
wenzelm@17412
   619
    | TVar v => Vartab.update v
wenzelm@16861
   620
    | _ => I));
wenzelm@5819
   621
wenzelm@16861
   622
val ins_used = fold_term_types (fn t =>
wenzelm@16861
   623
  fold_atyps (fn TFree (x, _) => insert (op =) x | _ => I));
wenzelm@12291
   624
wenzelm@16861
   625
val ins_occs = fold_term_types (fn t =>
wenzelm@17412
   626
  fold_atyps (fn TFree (x, _) => Symtab.update_multi (x, t) | _ => I));
wenzelm@5819
   627
wenzelm@16861
   628
fun ins_skolem def_ty = fold_rev (fn (x, x') =>
wenzelm@16861
   629
  (case def_ty x' of
wenzelm@17412
   630
    SOME T => Vartab.update ((x, ~1), T)
wenzelm@16861
   631
  | NONE => I));
wenzelm@5994
   632
wenzelm@16540
   633
fun map_defaults f = map_context (fn (syntax, asms, binds, thms, cases, defs) =>
wenzelm@16540
   634
  (syntax, asms, binds, thms, cases, f defs));
wenzelm@5819
   635
wenzelm@16031
   636
in
wenzelm@16031
   637
wenzelm@16031
   638
fun declare_term_syntax t ctxt =
wenzelm@5819
   639
  ctxt
wenzelm@16861
   640
  |> map_defaults (fn (types, sorts, used, occ) => (ins_types t types, sorts, used, occ))
wenzelm@16861
   641
  |> map_defaults (fn (types, sorts, used, occ) => (types, ins_sorts t sorts, used, occ))
wenzelm@16861
   642
  |> map_defaults (fn (types, sorts, used, occ) => (types, sorts, ins_used t used, occ));
wenzelm@10381
   643
wenzelm@16540
   644
fun declare_term t ctxt =
wenzelm@16031
   645
  ctxt
wenzelm@16031
   646
  |> declare_term_syntax t
wenzelm@16861
   647
  |> map_defaults (fn (types, sorts, used, occ) => (types, sorts, used, ins_occs t occ))
wenzelm@12291
   648
  |> map_defaults (fn (types, sorts, used, occ) =>
wenzelm@17412
   649
      (ins_skolem (fn x => Vartab.lookup types (x, ~1)) (fixes_of ctxt) types,
wenzelm@16861
   650
        sorts, used, occ));
wenzelm@5819
   651
wenzelm@10381
   652
end;
wenzelm@5819
   653
wenzelm@5819
   654
wenzelm@15703
   655
(* type and constant names *)
wenzelm@15703
   656
wenzelm@15703
   657
fun read_tyname ctxt c =
wenzelm@15703
   658
  if c mem_string used_types ctxt then
wenzelm@18187
   659
    TFree (c, the_default (Sign.defaultS (theory_of ctxt)) (def_sort ctxt (c, ~1)))
wenzelm@16458
   660
  else Sign.read_tyname (theory_of ctxt) c;
wenzelm@15703
   661
wenzelm@15703
   662
fun read_const ctxt c =
wenzelm@15703
   663
  (case lookup_skolem ctxt c of
wenzelm@15703
   664
    SOME c' => Free (c', dummyT)
wenzelm@16458
   665
  | NONE => Sign.read_const (theory_of ctxt) c);
wenzelm@15703
   666
wenzelm@15703
   667
wenzelm@8616
   668
wenzelm@8616
   669
(** Hindley-Milner polymorphism **)
wenzelm@8616
   670
wenzelm@7925
   671
(* warn_extra_tfrees *)
wenzelm@7925
   672
wenzelm@16540
   673
fun warn_extra_tfrees ctxt1 ctxt2 =
wenzelm@12130
   674
  let
wenzelm@17451
   675
    fun occs_typ a (Type (_, Ts)) = exists (occs_typ a) Ts
wenzelm@17451
   676
      | occs_typ a (TFree (b, _)) = a = b
wenzelm@17451
   677
      | occs_typ _ (TVar _) = false;
wenzelm@17451
   678
    fun occs_free a (Free (x, _)) =
wenzelm@17451
   679
          (case def_type ctxt1 false (x, ~1) of
wenzelm@17451
   680
            SOME T => if occs_typ a T then I else cons (a, x)
wenzelm@17451
   681
          | NONE => cons (a, x))
wenzelm@17451
   682
      | occs_free _ _ = I;
wenzelm@8616
   683
wenzelm@17451
   684
    val occs1 = type_occs_of ctxt1 and occs2 = type_occs_of ctxt2;
wenzelm@17451
   685
    val extras = Symtab.fold (fn (a, ts) =>
wenzelm@17451
   686
      if Symtab.defined occs1 a then I else fold (occs_free a) ts) occs2 [];
wenzelm@12130
   687
    val tfrees = map #1 extras |> Library.sort_strings |> Library.unique_strings;
wenzelm@12130
   688
    val frees = map #2 extras |> Library.sort_strings |> Library.unique_strings;
wenzelm@12130
   689
  in
wenzelm@12130
   690
    if null extras then ()
wenzelm@17451
   691
    else warning ("Introduced fixed type variable(s): " ^ commas tfrees ^ " in " ^
wenzelm@17860
   692
      space_implode " or " (map (string_of_term ctxt2 o Syntax.free) frees));
wenzelm@12130
   693
    ctxt2
wenzelm@12130
   694
  end;
wenzelm@8616
   695
wenzelm@8616
   696
wenzelm@8616
   697
(* generalize type variables *)
wenzelm@8616
   698
wenzelm@12550
   699
fun generalize_tfrees inner outer =
wenzelm@8616
   700
  let
wenzelm@12057
   701
    val extra_fixes = fixed_names_of inner \\ fixed_names_of outer;
wenzelm@8616
   702
    fun still_fixed (Free (x, _)) = not (x mem_string extra_fixes)
wenzelm@8616
   703
      | still_fixed _ = false;
wenzelm@16540
   704
    val occs_inner = type_occs_of inner;
wenzelm@16540
   705
    val occs_outer = type_occs_of outer;
wenzelm@16031
   706
    fun add a gen =
wenzelm@16894
   707
      if Symtab.defined occs_outer a orelse
wenzelm@17412
   708
        exists still_fixed (Symtab.lookup_multi occs_inner a)
wenzelm@8616
   709
      then gen else a :: gen;
wenzelm@16031
   710
  in fn tfrees => fold add tfrees [] end;
wenzelm@8616
   711
wenzelm@12550
   712
fun generalize inner outer ts =
wenzelm@8616
   713
  let
wenzelm@18187
   714
    val tfrees = generalize_tfrees inner outer (map #1 (fold Term.add_tfrees ts []));
wenzelm@8616
   715
    fun gen (x, S) = if x mem_string tfrees then TVar ((x, 0), S) else TFree (x, S);
wenzelm@12550
   716
  in map (Term.map_term_types (Term.map_type_tfree gen)) ts end;
wenzelm@8616
   717
wenzelm@8616
   718
wenzelm@9553
   719
wenzelm@9553
   720
(** export theorems **)
wenzelm@8616
   721
wenzelm@18042
   722
fun common_exports is_goal inner outer =
wenzelm@8616
   723
  let
wenzelm@12550
   724
    val gen = generalize_tfrees inner outer;
wenzelm@12057
   725
    val fixes = fixed_names_of inner \\ fixed_names_of outer;
wenzelm@12057
   726
    val asms = Library.drop (length (assumptions_of outer), assumptions_of inner);
wenzelm@11816
   727
    val exp_asms = map (fn (cprops, exp) => exp is_goal cprops) asms;
wenzelm@16948
   728
  in
wenzelm@18255
   729
    Goal.norm_hhf_protect
wenzelm@16948
   730
    #> Seq.EVERY (rev exp_asms)
wenzelm@16948
   731
    #> Seq.map (fn rule =>
wenzelm@11816
   732
      let
wenzelm@16992
   733
        val thy = Thm.theory_of_thm rule;
wenzelm@16992
   734
        val prop = Thm.full_prop_of rule;
wenzelm@18152
   735
        val frees = map (Thm.cterm_of thy) (List.mapPartial (Term.find_free prop) fixes);
wenzelm@12550
   736
        val tfrees = gen (Term.add_term_tfree_names (prop, []));
wenzelm@11816
   737
      in
wenzelm@11816
   738
        rule
wenzelm@11816
   739
        |> Drule.forall_intr_list frees
wenzelm@18255
   740
        |> Goal.norm_hhf_protect
wenzelm@18138
   741
        |> Drule.tvars_intr_list tfrees |> #2
wenzelm@11816
   742
      end)
wenzelm@11816
   743
  end;
wenzelm@8616
   744
wenzelm@18122
   745
fun export inner outer =
wenzelm@18122
   746
  let val exp = common_exports false inner outer in
wenzelm@13378
   747
    fn th =>
wenzelm@18122
   748
      (case Seq.pull (exp th) of
skalberg@15531
   749
        SOME (th', _) => th' |> Drule.local_standard
wenzelm@16850
   750
      | NONE => sys_error "Failed to export theorem")
wenzelm@13378
   751
  end;
wenzelm@12704
   752
wenzelm@18122
   753
val exports = common_exports false;
wenzelm@18122
   754
val goal_exports = common_exports true;
wenzelm@7925
   755
wenzelm@5819
   756
wenzelm@15758
   757
wenzelm@5819
   758
(** bindings **)
wenzelm@5819
   759
wenzelm@15758
   760
(* delete_update_binds *)
wenzelm@15758
   761
wenzelm@15758
   762
local
wenzelm@5819
   763
wenzelm@16540
   764
fun del_bind xi = map_context (fn (syntax, asms, binds, thms, cases, defs) =>
wenzelm@16540
   765
  (syntax, asms, Vartab.delete_safe xi binds, thms, cases, defs));
wenzelm@7606
   766
wenzelm@15758
   767
fun upd_bind ((x, i), t) =
wenzelm@8616
   768
  let
wenzelm@8616
   769
    val T = Term.fastype_of t;
wenzelm@8616
   770
    val t' =
wenzelm@8616
   771
      if null (Term.term_tvars t \\ Term.typ_tvars T) then t
wenzelm@8637
   772
      else Var ((x ^ "_has_extra_type_vars_on_rhs", i), T);
wenzelm@8616
   773
  in
wenzelm@16540
   774
    map_context (fn (syntax, asms, binds, thms, cases, defs) =>
wenzelm@17412
   775
      (syntax, asms, Vartab.update ((x, i), (t', T)) binds, thms, cases, defs))
wenzelm@15758
   776
    o declare_term t'
wenzelm@5819
   777
  end;
wenzelm@5819
   778
wenzelm@15758
   779
fun del_upd_bind (xi, NONE) = del_bind xi
wenzelm@15758
   780
  | del_upd_bind (xi, SOME t) = upd_bind (xi, t);
wenzelm@7606
   781
wenzelm@15758
   782
in
wenzelm@15758
   783
wenzelm@15758
   784
val delete_update_binds = fold del_upd_bind;
wenzelm@15758
   785
wenzelm@15758
   786
end;
wenzelm@7606
   787
wenzelm@5819
   788
wenzelm@8096
   789
(* simult_matches *)
wenzelm@8096
   790
wenzelm@8616
   791
fun simult_matches ctxt [] = []
wenzelm@8616
   792
  | simult_matches ctxt pairs =
wenzelm@8096
   793
      let
wenzelm@10554
   794
        fun fail () = raise CONTEXT ("Pattern match failed!", ctxt);
wenzelm@10554
   795
wenzelm@16031
   796
        val maxidx = fold (fn (t1, t2) => fn i =>
wenzelm@16031
   797
          Int.max (Int.max (Term.maxidx_of_term t1, Term.maxidx_of_term t2), i)) pairs ~1;
wenzelm@16458
   798
        val envs = Unify.smash_unifiers (theory_of ctxt, Envir.empty maxidx,
wenzelm@10554
   799
          map swap pairs);    (*prefer assignment of variables from patterns*)
wenzelm@10554
   800
        val env =
wenzelm@8096
   801
          (case Seq.pull envs of
skalberg@15531
   802
            NONE => fail ()
skalberg@15531
   803
          | SOME (env, _) => env);    (*ignore further results*)
wenzelm@12309
   804
        val domain =
wenzelm@12309
   805
          filter_out Term.is_replaced_dummy_pattern (map #1 (Drule.vars_of_terms (map #1 pairs)));
wenzelm@10554
   806
        val _ =    (*may not assign variables from text*)
wenzelm@12309
   807
          if null (map #1 (Envir.alist_of env) inter (map #1 (Drule.vars_of_terms (map #2 pairs))))
wenzelm@12309
   808
          then () else fail ();
wenzelm@16948
   809
        fun norm_bind (xi, (_, t)) =
wenzelm@16948
   810
          if mem_ix (xi, domain) then SOME (xi, Envir.norm_term env t) else NONE;
skalberg@15570
   811
      in List.mapPartial norm_bind (Envir.alist_of env) end;
wenzelm@8096
   812
wenzelm@8096
   813
wenzelm@8096
   814
(* add_binds(_i) *)
wenzelm@5819
   815
wenzelm@7925
   816
local
wenzelm@7925
   817
wenzelm@16031
   818
fun gen_bind prep (xi as (x, _), raw_t) ctxt =
skalberg@15570
   819
  ctxt |> delete_update_binds [(xi, Option.map (prep ctxt) raw_t)];
wenzelm@5819
   820
wenzelm@10810
   821
in
wenzelm@10810
   822
skalberg@15531
   823
fun drop_schematic (b as (xi, SOME t)) = if null (Term.term_vars t) then b else (xi, NONE)
wenzelm@10554
   824
  | drop_schematic b = b;
wenzelm@10554
   825
wenzelm@16031
   826
val add_binds = fold (gen_bind read_term);
wenzelm@16031
   827
val add_binds_i = fold (gen_bind cert_term);
wenzelm@8616
   828
wenzelm@16458
   829
fun auto_bind f ts ctxt = ctxt |> add_binds_i (map drop_schematic (f (theory_of ctxt) ts));
wenzelm@12147
   830
val auto_bind_goal = auto_bind AutoBind.goal;
wenzelm@12147
   831
val auto_bind_facts = auto_bind AutoBind.facts;
wenzelm@7925
   832
wenzelm@7925
   833
end;
wenzelm@5819
   834
wenzelm@5819
   835
wenzelm@8096
   836
(* match_bind(_i) *)
wenzelm@5819
   837
wenzelm@8096
   838
local
wenzelm@8096
   839
wenzelm@17860
   840
fun prep_bind prep_pats (raw_pats, t) ctxt =
wenzelm@5819
   841
  let
wenzelm@8096
   842
    val ctxt' = declare_term t ctxt;
wenzelm@8096
   843
    val pats = prep_pats (fastype_of t) ctxt' raw_pats;
wenzelm@8616
   844
    val binds = simult_matches ctxt' (map (rpair t) pats);
wenzelm@17860
   845
  in (binds, ctxt') end;
wenzelm@7670
   846
wenzelm@10465
   847
fun gen_binds prep_terms prep_pats gen raw_binds ctxt =
wenzelm@8616
   848
  let
wenzelm@10465
   849
    val ts = prep_terms ctxt (map snd raw_binds);
wenzelm@17860
   850
    val (binds, ctxt') =
wenzelm@17860
   851
      apfst List.concat (fold_map (prep_bind prep_pats) (map fst raw_binds ~~ ts) ctxt);
wenzelm@8616
   852
    val binds' =
wenzelm@12550
   853
      if gen then map #1 binds ~~ generalize ctxt' ctxt (map #2 binds)
wenzelm@8616
   854
      else binds;
skalberg@15531
   855
    val binds'' = map (apsnd SOME) binds';
wenzelm@8616
   856
  in
wenzelm@8616
   857
    warn_extra_tfrees ctxt
wenzelm@16031
   858
     (if gen then
wenzelm@16031
   859
        ctxt (*sic!*) |> fold declare_term (map #2 binds') |> add_binds_i binds''
wenzelm@8616
   860
      else ctxt' |> add_binds_i binds'')
wenzelm@8616
   861
  end;
wenzelm@8096
   862
wenzelm@8096
   863
in
wenzelm@5935
   864
wenzelm@10465
   865
val match_bind = gen_binds read_terms read_term_pats;
wenzelm@10465
   866
val match_bind_i = gen_binds (map o cert_term) cert_term_pats;
wenzelm@8096
   867
wenzelm@8096
   868
end;
wenzelm@5935
   869
wenzelm@5935
   870
wenzelm@10465
   871
(* propositions with patterns *)
wenzelm@5935
   872
wenzelm@10465
   873
local
wenzelm@8096
   874
wenzelm@10554
   875
fun prep_propp schematic prep_props prep_pats (context, args) =
wenzelm@10465
   876
  let
wenzelm@17860
   877
    fun prep (_, (raw_pats1, raw_pats2)) (ctxt, prop :: props) =
wenzelm@10465
   878
          let
wenzelm@10465
   879
            val ctxt' = declare_term prop ctxt;
wenzelm@10465
   880
            val pats = prep_pats ctxt' (raw_pats1 @ raw_pats2);    (*simultaneous type inference!*)
wenzelm@17860
   881
          in ((prop, splitAt (length raw_pats1, pats)), (ctxt', props)) end
wenzelm@17860
   882
      | prep _ _ = sys_error "prep_propp";
wenzelm@17860
   883
    val (propp, (context', _)) = (fold_map o fold_map) prep args
wenzelm@17860
   884
      (context, prep_props schematic context (List.concat (map (map fst) args)));
wenzelm@10465
   885
  in (context', propp) end;
wenzelm@5935
   886
wenzelm@10465
   887
fun matches ctxt (prop, (pats1, pats2)) =
wenzelm@10465
   888
  simult_matches ctxt (map (rpair prop) pats1 @ map (rpair (Logic.strip_imp_concl prop)) pats2);
wenzelm@8096
   889
wenzelm@10465
   890
fun gen_bind_propp prepp (ctxt, raw_args) =
wenzelm@8096
   891
  let
wenzelm@10465
   892
    val (ctxt', args) = prepp (ctxt, raw_args);
skalberg@15570
   893
    val binds = List.concat (List.concat (map (map (matches ctxt')) args));
wenzelm@10465
   894
    val propss = map (map #1) args;
wenzelm@8616
   895
wenzelm@10554
   896
    (*generalize result: context evaluated now, binds added later*)
wenzelm@8616
   897
    val gen = generalize ctxt' ctxt;
skalberg@15531
   898
    fun gen_binds c = c |> add_binds_i (map #1 binds ~~ map SOME (gen (map #2 binds)));
skalberg@15531
   899
  in (ctxt' |> add_binds_i (map (apsnd SOME) binds), (propss, gen_binds)) end;
wenzelm@8096
   900
wenzelm@10465
   901
in
wenzelm@10465
   902
wenzelm@11925
   903
val read_propp = prep_propp false read_props read_prop_pats;
wenzelm@11925
   904
val cert_propp = prep_propp false cert_props cert_prop_pats;
wenzelm@10554
   905
val read_propp_schematic = prep_propp true read_props read_prop_pats;
wenzelm@10554
   906
val cert_propp_schematic = prep_propp true cert_props cert_prop_pats;
wenzelm@10554
   907
wenzelm@11925
   908
val bind_propp = gen_bind_propp read_propp;
wenzelm@11925
   909
val bind_propp_i = gen_bind_propp cert_propp;
wenzelm@11925
   910
val bind_propp_schematic = gen_bind_propp read_propp_schematic;
wenzelm@10554
   911
val bind_propp_schematic_i = gen_bind_propp cert_propp_schematic;
wenzelm@6789
   912
wenzelm@10465
   913
end;
wenzelm@10465
   914
wenzelm@6789
   915
wenzelm@5819
   916
wenzelm@5819
   917
(** theorems **)
wenzelm@5819
   918
wenzelm@18042
   919
(* fact_tac *)
wenzelm@18042
   920
wenzelm@18122
   921
fun comp_incr_tac [] _ st = no_tac st
wenzelm@18122
   922
  | comp_incr_tac (th :: ths) i st =
wenzelm@18122
   923
      (Goal.compose_hhf_tac (Drule.incr_indexes st th) i APPEND comp_incr_tac ths i) st;
wenzelm@18042
   924
wenzelm@18122
   925
fun fact_tac facts = Tactic.norm_hhf_tac THEN' comp_incr_tac facts;
wenzelm@18122
   926
wenzelm@18122
   927
fun some_fact_tac ctxt = SUBGOAL (fn (goal, i) =>
wenzelm@18042
   928
  let
wenzelm@18042
   929
    val (_, _, index) = thms_of ctxt;
wenzelm@18042
   930
    val facts = FactIndex.could_unify index (Term.strip_all_body goal);
wenzelm@18042
   931
  in fact_tac facts i end);
wenzelm@18042
   932
wenzelm@18042
   933
wenzelm@6091
   934
(* get_thm(s) *)
wenzelm@5819
   935
wenzelm@18042
   936
fun retrieve_thms _ pick ctxt (Fact s) =
wenzelm@16501
   937
      let
wenzelm@18042
   938
        val thy = theory_of ctxt;
wenzelm@18042
   939
        val th = Goal.prove thy [] [] (read_prop ctxt s) (K (ALLGOALS (some_fact_tac ctxt)))
wenzelm@18042
   940
          handle ERROR_MESSAGE msg =>
wenzelm@18042
   941
            raise CONTEXT (msg ^ "\nFailed to retrieve literal fact.", ctxt);
wenzelm@18042
   942
      in pick "" [th] end
wenzelm@18042
   943
  | retrieve_thms from_thy pick ctxt xthmref =
wenzelm@18042
   944
      let
wenzelm@18042
   945
        val thy = theory_of ctxt;
wenzelm@18042
   946
        val (_, (space, tab), _) = thms_of ctxt;
wenzelm@16501
   947
        val thmref = PureThy.map_name_of_thmref (NameSpace.intern space) xthmref;
wenzelm@16501
   948
        val name = PureThy.name_of_thmref thmref;
wenzelm@16501
   949
      in
wenzelm@17412
   950
        (case Symtab.lookup tab name of
wenzelm@16540
   951
          SOME ths => map (Thm.transfer thy) (PureThy.select_thm thmref ths)
wenzelm@16540
   952
        | NONE => from_thy thy xthmref) |> pick name
wenzelm@18042
   953
      end;
wenzelm@5819
   954
wenzelm@9566
   955
val get_thm = retrieve_thms PureThy.get_thms PureThy.single_thm;
wenzelm@9566
   956
val get_thm_closure = retrieve_thms PureThy.get_thms_closure PureThy.single_thm;
wenzelm@9566
   957
val get_thms = retrieve_thms PureThy.get_thms (K I);
wenzelm@9566
   958
val get_thms_closure = retrieve_thms PureThy.get_thms_closure (K I);
wenzelm@5819
   959
wenzelm@5819
   960
wenzelm@16031
   961
(* valid_thms *)
wenzelm@16031
   962
wenzelm@16031
   963
fun valid_thms ctxt (name, ths) =
wenzelm@16501
   964
  (case try (transform_error (fn () => get_thms ctxt (Name name))) () of
wenzelm@16031
   965
    NONE => false
wenzelm@16147
   966
  | SOME ths' => Thm.eq_thms (ths, ths'));
wenzelm@16031
   967
wenzelm@16031
   968
wenzelm@16031
   969
(* lthms_containing *)
wenzelm@16031
   970
wenzelm@16031
   971
fun lthms_containing ctxt spec =
wenzelm@16031
   972
  FactIndex.find (fact_index_of ctxt) spec
wenzelm@18043
   973
  |> map ((not o valid_thms ctxt) ? apfst (fn name =>
wenzelm@18042
   974
    NameSpace.hidden (if name = "" then "unnamed" else name)));
wenzelm@16031
   975
wenzelm@16031
   976
wenzelm@13425
   977
(* name space operations *)
wenzelm@12309
   978
wenzelm@16540
   979
val extern_thm = NameSpace.extern o #1 o #2 o thms_of;
wenzelm@12309
   980
wenzelm@16540
   981
fun map_naming f = map_context (fn (syntax, asms, binds,
wenzelm@16348
   982
    (naming, table, index), cases, defs) =>
wenzelm@16540
   983
  (syntax, asms, binds, (f naming, table, index), cases, defs));
wenzelm@12309
   984
wenzelm@16147
   985
val qualified_names = map_naming NameSpace.qualified_names;
wenzelm@16147
   986
val no_base_names = map_naming NameSpace.no_base_names;
wenzelm@16147
   987
val custom_accesses = map_naming o NameSpace.custom_accesses;
wenzelm@16540
   988
val restore_naming = map_naming o K o #1 o thms_of;
wenzelm@12309
   989
wenzelm@16348
   990
fun hide_thms fully names = map_context
wenzelm@16540
   991
  (fn (syntax, asms, binds, (naming, (space, tab), index), cases, defs) =>
wenzelm@16540
   992
    (syntax, asms, binds,
wenzelm@16348
   993
      (naming, (fold (NameSpace.hide fully) names space, tab), index), cases, defs));
wenzelm@13425
   994
wenzelm@12309
   995
wenzelm@17360
   996
(* put_thms *)
wenzelm@5819
   997
wenzelm@18042
   998
fun put_thms ("", NONE) ctxt = ctxt
wenzelm@18042
   999
  | put_thms ("", SOME ths) ctxt = ctxt |> map_context
wenzelm@18042
  1000
      (fn (syntax, asms, binds, (naming, facts, index), cases, defs) =>
wenzelm@18042
  1001
        let
wenzelm@18042
  1002
          val index' = FactIndex.add_local (is_known ctxt) ("", ths) index;
wenzelm@18042
  1003
        in (syntax, asms, binds, (naming, facts, index'), cases, defs) end)
wenzelm@17360
  1004
  | put_thms (bname, NONE) ctxt = ctxt |> map_context
wenzelm@17360
  1005
      (fn (syntax, asms, binds, (naming, (space, tab), index), cases, defs) =>
wenzelm@17360
  1006
        let
wenzelm@17360
  1007
          val name = NameSpace.full naming bname;
wenzelm@17360
  1008
          val tab' = Symtab.delete_safe name tab;
wenzelm@17360
  1009
        in (syntax, asms, binds, (naming, (space, tab'), index), cases, defs) end)
wenzelm@17360
  1010
  | put_thms (bname, SOME ths) ctxt = ctxt |> map_context
wenzelm@16540
  1011
      (fn (syntax, asms, binds, (naming, (space, tab), index), cases, defs) =>
wenzelm@16147
  1012
        let
wenzelm@16147
  1013
          val name = NameSpace.full naming bname;
wenzelm@16147
  1014
          val space' = NameSpace.declare naming name space;
wenzelm@17412
  1015
          val tab' = Symtab.update (name, ths) tab;
wenzelm@18042
  1016
          val index' = FactIndex.add_local (is_known ctxt) (name, ths) index;
wenzelm@16540
  1017
        in (syntax, asms, binds, (naming, (space', tab'), index'), cases, defs) end);
wenzelm@5819
  1018
wenzelm@7606
  1019
wenzelm@14564
  1020
(* note_thmss *)
wenzelm@5819
  1021
wenzelm@12711
  1022
local
wenzelm@16147
  1023
wenzelm@17860
  1024
fun gen_note_thmss get = fold_map (fn ((name, more_attrs), ths_attrs) => fn ctxt =>
wenzelm@5819
  1025
  let
wenzelm@17360
  1026
    fun app (th, attrs) (ct, ths) =
wenzelm@12711
  1027
      let val (ct', th') = Thm.applys_attributes ((ct, get ctxt th), attrs @ more_attrs)
wenzelm@12711
  1028
      in (ct', th' :: ths) end;
wenzelm@17360
  1029
    val (ctxt', rev_thms) = fold app ths_attrs (ctxt, []);
skalberg@15570
  1030
    val thms = List.concat (rev rev_thms);
wenzelm@17860
  1031
  in ((name, thms), ctxt' |> put_thms (name, SOME thms)) end);
wenzelm@12711
  1032
wenzelm@12711
  1033
in
wenzelm@12711
  1034
wenzelm@16147
  1035
val note_thmss = gen_note_thmss get_thms;
wenzelm@16147
  1036
val note_thmss_i = gen_note_thmss (K I);
ballarin@15696
  1037
ballarin@15696
  1038
val note_thmss_accesses = gen_note_thmss get_thms;
ballarin@15696
  1039
val note_thmss_accesses_i = gen_note_thmss (K I);
wenzelm@12711
  1040
wenzelm@12711
  1041
end;
wenzelm@9196
  1042
wenzelm@5819
  1043
wenzelm@5819
  1044
wenzelm@5819
  1045
(** assumptions **)
wenzelm@5819
  1046
wenzelm@17360
  1047
wenzelm@8096
  1048
(* variables *)
wenzelm@8096
  1049
wenzelm@10381
  1050
local
wenzelm@10381
  1051
wenzelm@17860
  1052
fun prep_vars prep_typ internal liberal (xs, raw_T) ctxt =
wenzelm@8096
  1053
  let
wenzelm@12504
  1054
    fun cond_tvars T =
wenzelm@12504
  1055
      if internal then T
wenzelm@12504
  1056
      else Type.no_tvars T handle TYPE (msg, _, _) => raise CONTEXT (msg, ctxt);
wenzelm@12504
  1057
wenzelm@14720
  1058
    val _ = if liberal then () else
skalberg@15570
  1059
      (case List.filter (not o Syntax.is_identifier) (map (no_skolem internal ctxt) xs) of
wenzelm@8096
  1060
      [] => () | bads => raise CONTEXT ("Bad variable name(s): " ^ commas_quote bads, ctxt));
wenzelm@8096
  1061
skalberg@15570
  1062
    val opt_T = Option.map (cond_tvars o prep_typ ctxt) raw_T;
wenzelm@18187
  1063
    val T = the_default TypeInfer.logicT opt_T;
wenzelm@16031
  1064
    val ctxt' = ctxt |> fold declare_term_syntax (map (fn x => Free (x, T)) xs);
wenzelm@17860
  1065
  in ((xs, opt_T), ctxt') end;
wenzelm@8096
  1066
wenzelm@10381
  1067
in
wenzelm@10381
  1068
wenzelm@14720
  1069
val read_vars         = prep_vars read_typ false false;
wenzelm@14720
  1070
val cert_vars         = prep_vars cert_typ true false;
wenzelm@14720
  1071
val read_vars_liberal = prep_vars read_typ false true;
wenzelm@14720
  1072
val cert_vars_liberal = prep_vars cert_typ true true;
wenzelm@8096
  1073
wenzelm@10381
  1074
end;
wenzelm@10381
  1075
wenzelm@8096
  1076
wenzelm@5819
  1077
(* fix *)
wenzelm@5819
  1078
wenzelm@8096
  1079
local
wenzelm@8096
  1080
wenzelm@12309
  1081
fun map_fixes f =
wenzelm@16540
  1082
  map_context (fn (syntax, (assumes, fixes), binds, thms, cases, defs) =>
wenzelm@16540
  1083
    (syntax, (assumes, f fixes), binds, thms, cases, defs));
wenzelm@5819
  1084
wenzelm@11925
  1085
fun err_dups ctxt xs = raise CONTEXT ("Duplicate variable(s): " ^ commas_quote xs, ctxt);
wenzelm@11925
  1086
wenzelm@12130
  1087
val declare =
wenzelm@16031
  1088
  fold declare_term_syntax o
wenzelm@16031
  1089
  List.mapPartial (fn (_, NONE) => NONE | (x, SOME T) => SOME (Free (x, T)));
wenzelm@12130
  1090
wenzelm@12130
  1091
fun add_vars xs Ts ctxt =
wenzelm@12309
  1092
  let val xs' = Term.variantlist (map Syntax.skolem xs, map #2 (fixes_of ctxt)) in
wenzelm@12309
  1093
    ctxt
wenzelm@12309
  1094
    |> declare (xs' ~~ Ts)
wenzelm@17860
  1095
    |> map_fixes (append (xs ~~ xs'))
wenzelm@12130
  1096
  end;
wenzelm@11925
  1097
wenzelm@12130
  1098
fun add_vars_direct xs Ts ctxt =
wenzelm@12309
  1099
  ctxt
wenzelm@12309
  1100
  |> declare (xs ~~ Ts)
wenzelm@12309
  1101
  |> map_fixes (fn fixes =>
wenzelm@12130
  1102
    (case xs inter_string map #1 fixes of
wenzelm@12309
  1103
      [] => (xs ~~ xs) @ fixes
wenzelm@12130
  1104
    | dups => err_dups ctxt dups));
wenzelm@12130
  1105
wenzelm@11925
  1106
wenzelm@11925
  1107
fun gen_fix prep add raw_vars ctxt =
wenzelm@8096
  1108
  let
wenzelm@17860
  1109
    val (varss, ctxt') = fold_map prep raw_vars ctxt;
skalberg@15570
  1110
    val vars = rev (List.concat (map (fn (xs, T) => map (rpair T) xs) varss));
wenzelm@12130
  1111
    val xs = map #1 vars;
wenzelm@12130
  1112
    val Ts = map #2 vars;
wenzelm@8096
  1113
  in
wenzelm@11925
  1114
    (case Library.duplicates xs of [] => () | dups => err_dups ctxt dups);
wenzelm@12130
  1115
    ctxt' |> add xs Ts
wenzelm@8096
  1116
  end;
wenzelm@5819
  1117
skalberg@15531
  1118
fun prep_type (x, NONE, SOME mx) = ([x], SOME (mixfix_type mx))
wenzelm@12576
  1119
  | prep_type (x, opt_T, _) = ([x], opt_T);
wenzelm@12576
  1120
wenzelm@8096
  1121
in
wenzelm@7679
  1122
wenzelm@11925
  1123
val fix = gen_fix read_vars add_vars;
wenzelm@11925
  1124
val fix_i = gen_fix cert_vars add_vars;
wenzelm@14720
  1125
wenzelm@14720
  1126
fun fix_direct liberal =
wenzelm@14720
  1127
  gen_fix (if liberal then cert_vars_liberal else cert_vars) add_vars_direct;
wenzelm@14720
  1128
wenzelm@14720
  1129
fun add_fixes decls = add_syntax decls o fix_direct false (map prep_type decls);
wenzelm@14720
  1130
fun add_fixes_liberal decls = add_syntax decls o fix_direct true (map prep_type decls);
wenzelm@8096
  1131
wenzelm@8096
  1132
end;
wenzelm@5819
  1133
wenzelm@12048
  1134
fun fix_frees ts ctxt =
wenzelm@12048
  1135
  let
wenzelm@16861
  1136
    val frees = fold Term.add_frees ts [];
skalberg@15531
  1137
    fun new (x, T) = if is_fixed ctxt x then NONE else SOME ([x], SOME T);
skalberg@15570
  1138
  in fix_direct false (rev (List.mapPartial new frees)) ctxt end;
wenzelm@12016
  1139
wenzelm@17451
  1140
fun auto_fix (ctxt, (propss, x)) = (ctxt |> fix_frees (List.concat propss), (propss, x));
wenzelm@17451
  1141
wenzelm@6895
  1142
wenzelm@9291
  1143
(*Note: improper use may result in variable capture / dynamic scoping!*)
wenzelm@9291
  1144
fun bind_skolem ctxt xs =
wenzelm@9291
  1145
  let
skalberg@15531
  1146
    val ctxt' = ctxt |> fix_i [(xs, NONE)];
wenzelm@9291
  1147
    fun bind (t as Free (x, T)) =
wenzelm@9291
  1148
          if x mem_string xs then
skalberg@15531
  1149
            (case lookup_skolem ctxt' x of SOME x' => Free (x', T) | NONE => t)
wenzelm@9291
  1150
          else t
wenzelm@9291
  1151
      | bind (t $ u) = bind t $ bind u
wenzelm@9291
  1152
      | bind (Abs (x, T, t)) = Abs (x, T, bind t)
wenzelm@9291
  1153
      | bind a = a;
wenzelm@9291
  1154
  in bind end;
wenzelm@9291
  1155
wenzelm@9291
  1156
wenzelm@18187
  1157
(* basic exporters *)
wenzelm@18187
  1158
wenzelm@18187
  1159
fun export_assume true = Seq.single oo Drule.implies_intr_protected
wenzelm@18187
  1160
  | export_assume false = Seq.single oo Drule.implies_intr_list;
wenzelm@18187
  1161
wenzelm@18187
  1162
fun export_presume _ = export_assume false;
wenzelm@18187
  1163
wenzelm@18187
  1164
wenzelm@18187
  1165
(* assume *)
wenzelm@18187
  1166
wenzelm@18187
  1167
local
wenzelm@18187
  1168
wenzelm@18187
  1169
fun add_assm ((name, attrs), props) ctxt =
wenzelm@18187
  1170
  let
wenzelm@18187
  1171
    val cprops = map (Thm.cterm_of (theory_of ctxt)) props;
wenzelm@18187
  1172
    val asms = map (Goal.norm_hhf o Thm.assume) cprops;
wenzelm@18187
  1173
wenzelm@18187
  1174
    val ths = map (fn th => ([th], [])) asms;
wenzelm@18187
  1175
    val ([(_, thms)], ctxt') =
wenzelm@18187
  1176
      ctxt
wenzelm@18187
  1177
      |> auto_bind_facts props
wenzelm@18187
  1178
      |> note_thmss_i [((name, attrs), ths)];
wenzelm@18187
  1179
  in ((cprops, (name, asms), (name, thms)), ctxt') end;
wenzelm@18187
  1180
wenzelm@18187
  1181
fun gen_assms prepp exp args ctxt =
wenzelm@18187
  1182
  let
wenzelm@18187
  1183
    val (ctxt1, propss) = prepp (ctxt, map snd args);
wenzelm@18187
  1184
    val (results, ctxt2) = fold_map add_assm (map fst args ~~ propss) ctxt1;
wenzelm@18187
  1185
wenzelm@18187
  1186
    val cprops = List.concat (map #1 results);
wenzelm@18187
  1187
    val asmss = map #2 results;
wenzelm@18187
  1188
    val thmss = map #3 results;
wenzelm@18187
  1189
    val ctxt3 = ctxt2 |> map_context
wenzelm@18187
  1190
      (fn (syntax, ((asms_ct, asms_th), fixes), binds, thms, cases, defs) =>
wenzelm@18187
  1191
        (syntax, ((asms_ct @ [(cprops, exp)], asms_th @ asmss), fixes), binds, thms,
wenzelm@18187
  1192
          cases, defs));
wenzelm@18187
  1193
    val ctxt4 = ctxt3 |> put_thms ("prems", SOME (prems_of ctxt3));
wenzelm@18187
  1194
  in (thmss, warn_extra_tfrees ctxt ctxt4) end;
wenzelm@18187
  1195
wenzelm@18187
  1196
in
wenzelm@18187
  1197
wenzelm@18187
  1198
val assume = gen_assms (apsnd #1 o bind_propp);
wenzelm@18187
  1199
val assume_i = gen_assms (apsnd #1 o bind_propp_i);
wenzelm@18187
  1200
wenzelm@18187
  1201
end;
wenzelm@18187
  1202
wenzelm@18187
  1203
wenzelm@18187
  1204
(* defs *)
wenzelm@18187
  1205
wenzelm@18187
  1206
fun mk_def ctxt (x, rhs) =
wenzelm@18187
  1207
  let val lhs = bind_skolem ctxt [x] (Free (x, Term.fastype_of rhs));
wenzelm@18187
  1208
  in Logic.mk_equals (lhs, rhs) end;
wenzelm@18187
  1209
wenzelm@18187
  1210
fun cert_def ctxt eq =
wenzelm@18187
  1211
  let
wenzelm@18187
  1212
    fun err msg = raise CONTEXT (msg ^
wenzelm@18187
  1213
      "\nThe error(s) above occurred in local definition: " ^ string_of_term ctxt eq, ctxt);
wenzelm@18187
  1214
    val (lhs, rhs) = Logic.dest_equals (Term.strip_all_body eq)
wenzelm@18187
  1215
      handle TERM _ => err "Not a meta-equality (==)";
wenzelm@18187
  1216
    val (f, xs) = Term.strip_comb lhs;
wenzelm@18187
  1217
    val (c, _) = Term.dest_Free f handle TERM _ =>
wenzelm@18187
  1218
      err "Head of lhs must be a free/fixed variable";
wenzelm@18187
  1219
wenzelm@18187
  1220
    fun is_free (Free (x, _)) = not (is_fixed ctxt x)
wenzelm@18187
  1221
      | is_free _ = false;
wenzelm@18187
  1222
    val extra_frees = List.filter is_free (term_frees rhs) \\ xs;
wenzelm@18187
  1223
  in
wenzelm@18187
  1224
    conditional (not (forall (is_Bound orf is_free) xs andalso null (duplicates xs))) (fn () =>
wenzelm@18187
  1225
      err "Arguments of lhs must be distinct free/bound variables");
wenzelm@18187
  1226
    conditional (f mem Term.term_frees rhs) (fn () =>
wenzelm@18187
  1227
      err "Element to be defined occurs on rhs");
wenzelm@18187
  1228
    conditional (not (null extra_frees)) (fn () =>
wenzelm@18187
  1229
      err ("Extra free variables on rhs: " ^ commas_quote (map (#1 o dest_Free) extra_frees)));
wenzelm@18187
  1230
    (c, Term.list_all_free (List.mapPartial (try Term.dest_Free) xs, eq))
wenzelm@18187
  1231
  end;
wenzelm@18187
  1232
wenzelm@18187
  1233
fun head_of_def cprop =
wenzelm@18187
  1234
  #1 (Term.strip_comb (#1 (Logic.dest_equals (Term.strip_all_body (Thm.term_of cprop)))))
wenzelm@18187
  1235
  |> Thm.cterm_of (Thm.theory_of_cterm cprop);
wenzelm@18187
  1236
wenzelm@18187
  1237
fun export_def _ cprops thm =
wenzelm@18187
  1238
  thm
wenzelm@18187
  1239
  |> Drule.implies_intr_list cprops
wenzelm@18187
  1240
  |> Drule.forall_intr_list (map head_of_def cprops)
wenzelm@18187
  1241
  |> Drule.forall_elim_vars 0
wenzelm@18187
  1242
  |> RANGE (replicate (length cprops) (Tactic.rtac Drule.reflexive_thm)) 1;
wenzelm@18187
  1243
wenzelm@18187
  1244
fun add_def (x, t) ctxt =
wenzelm@18187
  1245
  let
wenzelm@18187
  1246
    val eq = mk_def ctxt (x, t);
wenzelm@18187
  1247
    val x' = Term.dest_Free (fst (Logic.dest_equals eq));
wenzelm@18187
  1248
  in
wenzelm@18187
  1249
    ctxt
wenzelm@18187
  1250
    |> fix_i [([x], NONE)]
wenzelm@18187
  1251
    |> assume_i export_def [(("", []), [(eq, ([], []))])]
wenzelm@18187
  1252
    |>> (fn [(_, [th])] => (x', th))
wenzelm@18187
  1253
  end;
wenzelm@18187
  1254
wenzelm@18187
  1255
wenzelm@18187
  1256
(* views *)
wenzelm@18187
  1257
wenzelm@18187
  1258
fun add_view outer view =
wenzelm@18187
  1259
  map_context (fn (syntax, ((asms, prems), fixes), binds, thms, cases, defs) =>
wenzelm@18187
  1260
    let
wenzelm@18187
  1261
      val (asms1, asms2) = splitAt (length (assumptions_of outer), asms);
wenzelm@18187
  1262
      val asms' = asms1 @ [(view, export_assume)] @ asms2;
wenzelm@18187
  1263
    in (syntax, ((asms', prems), fixes), binds, thms, cases, defs) end);
wenzelm@18187
  1264
wenzelm@18187
  1265
fun export_view view inner outer = export (add_view outer view inner) outer;
wenzelm@18187
  1266
wenzelm@18187
  1267
wenzelm@5819
  1268
wenzelm@8373
  1269
(** cases **)
wenzelm@8373
  1270
wenzelm@16147
  1271
fun apply_case ({fixes, assumes, binds}: RuleCases.T) ctxt =
wenzelm@16147
  1272
  let
wenzelm@17860
  1273
    fun bind (x, T) c = (bind_skolem c [x] (Free (x, T)), c |> fix_i [([x], SOME T)]);
wenzelm@17860
  1274
    val (xs, ctxt') = fold_map bind fixes ctxt;
wenzelm@18187
  1275
    fun app t = Term.betapplys (t, xs);
wenzelm@17860
  1276
  in ((map (apsnd (Option.map app)) binds, map (apsnd (map app)) assumes), ctxt') end;
wenzelm@16147
  1277
wenzelm@16147
  1278
local
wenzelm@16147
  1279
wenzelm@11793
  1280
fun prep_case ctxt name xs {fixes, assumes, binds} =
wenzelm@11793
  1281
  let
wenzelm@18187
  1282
    fun replace (opt_x :: xs) ((y, T) :: ys) = (the_default y opt_x, T) :: replace xs ys
wenzelm@11793
  1283
      | replace [] ys = ys
wenzelm@11793
  1284
      | replace (_ :: _) [] = raise CONTEXT ("Too many parameters for case " ^ quote name, ctxt);
wenzelm@11793
  1285
  in
wenzelm@18187
  1286
    if null (fold (Term.add_tvarsT o snd) fixes []) andalso
wenzelm@18187
  1287
      null (fold (fold Term.add_vars o snd) assumes []) then
wenzelm@11793
  1288
        {fixes = replace xs fixes, assumes = assumes, binds = map drop_schematic binds}
wenzelm@11793
  1289
    else raise CONTEXT ("Illegal schematic variable(s) in case " ^ quote name, ctxt)
wenzelm@11793
  1290
  end;
wenzelm@8403
  1291
wenzelm@16668
  1292
fun rem_case name = remove (fn (x: string, (y, _)) => x = y) name;
wenzelm@16147
  1293
wenzelm@16147
  1294
fun add_case ("", _) cases = cases
wenzelm@16147
  1295
  | add_case (name, NONE) cases = rem_case name cases
wenzelm@16147
  1296
  | add_case (name, SOME c) cases = (name, c) :: rem_case name cases;
wenzelm@16147
  1297
wenzelm@16147
  1298
in
wenzelm@16147
  1299
wenzelm@16540
  1300
fun get_case ctxt name xs =
wenzelm@17184
  1301
  (case AList.lookup (op =) (cases_of ctxt) name of
skalberg@15531
  1302
    NONE => raise CONTEXT ("Unknown case: " ^ quote name, ctxt)
skalberg@15531
  1303
  | SOME c => prep_case ctxt name xs c);
wenzelm@8373
  1304
wenzelm@16540
  1305
fun add_cases xs = map_context (fn (syntax, asms, binds, thms, cases, defs) =>
wenzelm@16540
  1306
  (syntax, asms, binds, thms, fold add_case xs cases, defs));
wenzelm@8384
  1307
wenzelm@16147
  1308
end;
wenzelm@8373
  1309
wenzelm@8373
  1310
wenzelm@8373
  1311
wenzelm@10810
  1312
(** print context information **)
wenzelm@10810
  1313
wenzelm@10810
  1314
val verbose = ref false;
wenzelm@10810
  1315
fun verb f x = if ! verbose then f (x ()) else [];
wenzelm@10810
  1316
fun verb_single x = verb Library.single x;
wenzelm@10810
  1317
wenzelm@10810
  1318
fun setmp_verbose f x = Library.setmp verbose true f x;
wenzelm@10810
  1319
wenzelm@10810
  1320
fun pretty_items prt name items =
wenzelm@10810
  1321
  let
wenzelm@10810
  1322
    fun prt_itms (name, [x]) = Pretty.block [Pretty.str (name ^ ":"), Pretty.brk 1, prt x]
wenzelm@10810
  1323
      | prt_itms (name, xs) = Pretty.big_list (name ^ ":") (map prt xs);
wenzelm@10810
  1324
  in
wenzelm@10810
  1325
    if null items andalso not (! verbose) then []
wenzelm@10810
  1326
    else [Pretty.big_list name (map prt_itms items)]
wenzelm@10810
  1327
  end;
wenzelm@10810
  1328
wenzelm@10810
  1329
wenzelm@12072
  1330
(* local syntax *)
wenzelm@12072
  1331
wenzelm@12093
  1332
val print_syntax = Syntax.print_syntax o syn_of;
wenzelm@12072
  1333
wenzelm@12072
  1334
wenzelm@10810
  1335
(* term bindings *)
wenzelm@10810
  1336
wenzelm@16540
  1337
fun pretty_binds ctxt =
wenzelm@10810
  1338
  let
wenzelm@16540
  1339
    val binds = binds_of ctxt;
wenzelm@12057
  1340
    fun prt_bind (xi, (t, T)) = pretty_term ctxt (Logic.mk_equals (Var (xi, T), t));
wenzelm@10810
  1341
  in
wenzelm@15758
  1342
    if Vartab.is_empty binds andalso not (! verbose) then []
wenzelm@15758
  1343
    else [Pretty.big_list "term bindings:" (map prt_bind (Vartab.dest binds))]
wenzelm@10810
  1344
  end;
wenzelm@10810
  1345
wenzelm@10810
  1346
val print_binds = Pretty.writeln o Pretty.chunks o pretty_binds;
wenzelm@10810
  1347
wenzelm@10810
  1348
wenzelm@10810
  1349
(* local theorems *)
wenzelm@10810
  1350
wenzelm@16540
  1351
fun pretty_lthms ctxt =
wenzelm@16540
  1352
  pretty_items (pretty_thm ctxt) "facts:" (NameSpace.extern_table (#2 (thms_of ctxt)));
wenzelm@10810
  1353
wenzelm@12057
  1354
val print_lthms = Pretty.writeln o Pretty.chunks o pretty_lthms;
wenzelm@10810
  1355
wenzelm@10810
  1356
wenzelm@10810
  1357
(* local contexts *)
wenzelm@10810
  1358
wenzelm@16540
  1359
fun pretty_cases ctxt =
wenzelm@10810
  1360
  let
wenzelm@12057
  1361
    val prt_term = pretty_term ctxt;
wenzelm@12057
  1362
wenzelm@10810
  1363
    fun prt_let (xi, t) = Pretty.block
wenzelm@10818
  1364
      [Pretty.quote (prt_term (Var (xi, Term.fastype_of t))), Pretty.str " =", Pretty.brk 1,
wenzelm@10810
  1365
        Pretty.quote (prt_term t)];
wenzelm@10810
  1366
wenzelm@13425
  1367
    fun prt_asm (a, ts) = Pretty.block (Pretty.breaks
wenzelm@13425
  1368
      ((if a = "" then [] else [Pretty.str (a ^ ":")]) @ map (Pretty.quote o prt_term) ts));
wenzelm@13425
  1369
wenzelm@10810
  1370
    fun prt_sect _ _ _ [] = []
wenzelm@10810
  1371
      | prt_sect s sep prt xs = [Pretty.block (Pretty.breaks (Pretty.str s ::
skalberg@15570
  1372
            List.concat (Library.separate sep (map (Library.single o prt) xs))))];
wenzelm@10810
  1373
wenzelm@10830
  1374
    fun prt_case (name, (fixes, (lets, asms))) = Pretty.block (Pretty.fbreaks
wenzelm@10810
  1375
      (Pretty.str (name ^ ":") ::
wenzelm@11915
  1376
        prt_sect "fix" [] (Pretty.str o fst) fixes @
wenzelm@10810
  1377
        prt_sect "let" [Pretty.str "and"] prt_let
skalberg@15570
  1378
          (List.mapPartial (fn (xi, SOME t) => SOME (xi, t) | _ => NONE) lets) @
wenzelm@13425
  1379
        (if forall (null o #2) asms then []
wenzelm@13425
  1380
          else prt_sect "assume" [Pretty.str "and"] prt_asm asms)));
wenzelm@16540
  1381
wenzelm@16540
  1382
    val cases = cases_of ctxt;
wenzelm@10810
  1383
  in
wenzelm@10810
  1384
    if null cases andalso not (! verbose) then []
wenzelm@10830
  1385
    else [Pretty.big_list "cases:"
wenzelm@17860
  1386
      (map (prt_case o apsnd (fn c => (#fixes c, #1 (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@16540
  1429
fun pretty_context ctxt =
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@17384
  1437
      [Pretty.str "theory:", Pretty.brk 1, Context.pretty_thy (theory_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@16540
  1451
wenzelm@16540
  1452
    val (types, sorts, used, _) = defaults_of ctxt;
wenzelm@10810
  1453
  in
wenzelm@10810
  1454
    verb_single (K pretty_thy) @
wenzelm@12057
  1455
    pretty_asms ctxt @
wenzelm@10810
  1456
    verb pretty_binds (K ctxt) @
wenzelm@12057
  1457
    verb pretty_lthms (K ctxt) @
wenzelm@10810
  1458
    verb pretty_cases (K ctxt) @
wenzelm@10810
  1459
    verb_single (fn () => Pretty.big_list "type constraints:" (map prt_defT (Vartab.dest types))) @
wenzelm@10810
  1460
    verb_single (fn () => Pretty.big_list "default sorts:" (map prt_defS (Vartab.dest sorts))) @
wenzelm@10810
  1461
    verb_single (fn () => Pretty.strs ("used type variable names:" :: used))
wenzelm@10810
  1462
  end;
wenzelm@10810
  1463
wenzelm@5819
  1464
end;