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(*
File: aux_definitions.ml
Description: This file defines a few useful functions
Author: (c) Copyright 1989-2008 by Flemming Andersen
Date: October 23, 1989
Last Update: December 30, 2007
*)
let prove_thm ((thm_name:string), thm_term, thm_tactic) =
prove (thm_term, thm_tactic);;
(* Uniform error facility *)
let UNITY_ERR (func,mesg) = ( failwith func, Failure mesg );;
(*----------------------------------------------------------------------*)
(* Auxilliary definitions *)
(*----------------------------------------------------------------------*)
let UNDISCH_ALL_TAC =
let th_tac (th:thm) (tac:tactic) = (MP_TAC th) THEN tac in
let u_asml (thml:thm list) = itlist th_tac thml ALL_TAC in
POP_ASSUM_LIST u_asml
;;
let UNDISCH_ONE_TAC =
let th_tac (th:thm) (tac:tactic) = (UNDISCH_TAC (concl th)) THEN tac in
let u_asm (th:thm) = itlist th_tac [th] ALL_TAC in
FIRST_ASSUM u_asm
;;
let LIST_INDUCT = list_INDUCT;;
let CONTRAPOS =
let a = `a:bool` and b = `b:bool` in
let pth = ITAUT `(a ==> b) ==> (~b ==> ~a)` in
fun th ->
try let P,Q = dest_imp(concl th) in
MP (INST [P,a; Q,b] pth) th
with Failure _ -> failwith "CONTRAPOS";;
let OP_FIX = 200;;
let new_infix_definition (define_name, name_org, define_term, fixity) =
(
let defined_thm = new_definition define_term in
let (infix_num, assoc_str) = get_infix_status name_org in
let defined_infix =
( parse_as_infix ( define_name, (infix_num + fixity, assoc_str) ) ) in
(fst (defined_thm, defined_infix))
);;
(*
get_infix_status
infixes();;
get_prefix_status
prefixes();;
*)
let new_binder_definition def_term def_binder =
(
let def_thm = ( new_definition def_term ) in
let def_bind = ( parse_as_binder def_binder ) in
(fst (def_thm, def_bind))
);;
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