# HG changeset patch # User paulson # Date 825616414 -3600 # Node ID 6be6ea6f8b5dd49d3a349a6246232f6bd7b7dfcb # Parent d127436567d0b6c5dc39227c064870fd25235d46 New file of just the theory primitives diff -r d127436567d0 -r 6be6ea6f8b5d src/Pure/theory.ML --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/Pure/theory.ML Thu Feb 29 18:53:34 1996 +0100 @@ -0,0 +1,217 @@ +(* Title: Pure/theory.ML + ID: $Id$ + Author: Lawrence C Paulson and Markus Wenzel + Copyright 1996 University of Cambridge + +Theories +*) + +signature THEORY = + sig + type theory + exception THEORY of string * theory list + val rep_theory : theory -> + {sign: Sign.sg, new_axioms: term Symtab.table, parents: theory list} + val sign_of : theory -> Sign.sg + val syn_of : theory -> Syntax.syntax + val stamps_of_thy : theory -> string ref list + val parents_of : theory -> theory list + val subthy : theory * theory -> bool + val eq_thy : theory * theory -> bool + val proto_pure_thy : theory + val pure_thy : theory + val cpure_thy : theory + (*theory primitives*) + val add_classes : (class * class list) list -> theory -> theory + val add_classrel : (class * class) list -> theory -> theory + val add_defsort : sort -> theory -> theory + val add_types : (string * int * mixfix) list -> theory -> theory + val add_tyabbrs : (string * string list * string * mixfix) list + -> theory -> theory + val add_tyabbrs_i : (string * string list * typ * mixfix) list + -> theory -> theory + val add_arities : (string * sort list * sort) list -> theory -> theory + val add_consts : (string * string * mixfix) list -> theory -> theory + val add_consts_i : (string * typ * mixfix) list -> theory -> theory + val add_syntax : (string * string * mixfix) list -> theory -> theory + val add_syntax_i : (string * typ * mixfix) list -> theory -> theory + val add_trfuns : + (string * (Syntax.ast list -> Syntax.ast)) list * + (string * (term list -> term)) list * + (string * (term list -> term)) list * + (string * (Syntax.ast list -> Syntax.ast)) list -> theory -> theory + val add_trrules : (string * string)Syntax.trrule list -> theory -> theory + val add_trrules_i : Syntax.ast Syntax.trrule list -> theory -> theory + val cert_axm : Sign.sg -> string * term -> string * term + val read_axm : Sign.sg -> string * string -> string * term + val inferT_axm : Sign.sg -> string * term -> string * term + val add_axioms : (string * string) list -> theory -> theory + val add_axioms_i : (string * term) list -> theory -> theory + val add_thyname : string -> theory -> theory + + val merge_theories : theory * theory -> theory + val merge_thy_list : bool -> theory list -> theory +end; + + +structure Theory : THEORY = +struct +(*** Theories ***) + +datatype theory = + Theory of { + sign: Sign.sg, + new_axioms: term Symtab.table, + parents: theory list}; + +fun rep_theory (Theory args) = args; + +(*errors involving theories*) +exception THEORY of string * theory list; + + +val sign_of = #sign o rep_theory; +val syn_of = #syn o Sign.rep_sg o sign_of; + +(*stamps associated with a theory*) +val stamps_of_thy = #stamps o Sign.rep_sg o sign_of; + +(*return the immediate ancestors*) +val parents_of = #parents o rep_theory; + + +(*compare theories*) +val subthy = Sign.subsig o pairself sign_of; +val eq_thy = Sign.eq_sg o pairself sign_of; + + +(* the Pure theories *) + +val proto_pure_thy = + Theory {sign = Sign.proto_pure, new_axioms = Symtab.null, parents = []}; + +val pure_thy = + Theory {sign = Sign.pure, new_axioms = Symtab.null, parents = []}; + +val cpure_thy = + Theory {sign = Sign.cpure, new_axioms = Symtab.null, parents = []}; + + + +(** extend theory **) + +fun err_dup_axms names = + error ("Duplicate axiom name(s) " ^ commas_quote names); + +fun ext_thy (thy as Theory {sign, new_axioms, parents}) sign1 new_axms = + let + val draft = Sign.is_draft sign; + val new_axioms1 = + Symtab.extend_new (if draft then new_axioms else Symtab.null, new_axms) + handle Symtab.DUPS names => err_dup_axms names; + val parents1 = if draft then parents else [thy]; + in + Theory {sign = sign1, new_axioms = new_axioms1, parents = parents1} + end; + + +(* extend signature of a theory *) + +fun ext_sg extfun decls (thy as Theory {sign, ...}) = + ext_thy thy (extfun decls sign) []; + +val add_classes = ext_sg Sign.add_classes; +val add_classrel = ext_sg Sign.add_classrel; +val add_defsort = ext_sg Sign.add_defsort; +val add_types = ext_sg Sign.add_types; +val add_tyabbrs = ext_sg Sign.add_tyabbrs; +val add_tyabbrs_i = ext_sg Sign.add_tyabbrs_i; +val add_arities = ext_sg Sign.add_arities; +val add_consts = ext_sg Sign.add_consts; +val add_consts_i = ext_sg Sign.add_consts_i; +val add_syntax = ext_sg Sign.add_syntax; +val add_syntax_i = ext_sg Sign.add_syntax_i; +val add_trfuns = ext_sg Sign.add_trfuns; +val add_trrules = ext_sg Sign.add_trrules; +val add_trrules_i = ext_sg Sign.add_trrules_i; +val add_thyname = ext_sg Sign.add_name; + + +(* prepare axioms *) + +fun err_in_axm name = + error ("The error(s) above occurred in axiom " ^ quote name); + +fun no_vars tm = + if null (term_vars tm) andalso null (term_tvars tm) then tm + else error "Illegal schematic variable(s) in term"; + +fun cert_axm sg (name, raw_tm) = + let + val (t, T, _) = Sign.certify_term sg raw_tm + handle TYPE arg => error (Sign.exn_type_msg sg arg) + | TERM (msg, _) => error msg; + in + assert (T = propT) "Term not of type prop"; + (name, no_vars t) + end + handle ERROR => err_in_axm name; + +(*Some duplication of code with read_def_cterm*) +fun read_axm sg (name, str) = + let val ts = Syntax.read (#syn (Sign.rep_sg sg)) propT str; + val (_, t, _) = + Sign.infer_types sg (K None) (K None) [] true (ts,propT); + in cert_axm sg (name,t) end; + +fun inferT_axm sg (name, pre_tm) = + let val t = #2(Sign.infer_types sg (K None) (K None) [] true + ([pre_tm], propT)) + in (name, no_vars t) end + handle ERROR => err_in_axm name; + + +(* extend axioms of a theory *) + +fun ext_axms prep_axm axms (thy as Theory {sign, ...}) = + let + val sign1 = Sign.make_draft sign; + val axioms = map (apsnd (Term.compress_term o Logic.varify) o + prep_axm sign) + axms; + in + ext_thy thy sign1 axioms + end; + +val add_axioms = ext_axms read_axm; +val add_axioms_i = ext_axms cert_axm; + + + +(** merge theories **) + +fun merge_thy_list mk_draft thys = + let + fun is_union thy = forall (fn t => subthy (t, thy)) thys; + val is_draft = Sign.is_draft o sign_of; + + fun add_sign (sg, Theory {sign, ...}) = + Sign.merge (sg, sign) handle TERM (msg, _) => error msg; + in + (case (find_first is_union thys, exists is_draft thys) of + (Some thy, _) => thy + | (None, true) => raise THEORY ("Illegal merge of draft theories", thys) + | (None, false) => Theory { + sign = + (if mk_draft then Sign.make_draft else I) + (foldl add_sign (Sign.proto_pure, thys)), + new_axioms = Symtab.null, + parents = thys}) + end; + +fun merge_theories (thy1, thy2) = merge_thy_list false [thy1, thy2]; + + +end; + +open Theory;