author | blanchet |
Sat, 08 Sep 2012 21:04:26 +0200 | |
changeset 49205 | 674f04c737e0 |
parent 49161 | a8e74375d971 |
child 49207 | 4634c217b77b |
permissions | -rw-r--r-- |
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(* Title: HOL/Codatatype/Tools/bnf_fp_sugar_tactics.ML |
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Author: Jasmin Blanchette, TU Muenchen |
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Copyright 2012 |
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Tactics for the LFP/GFP sugar. |
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*) |
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signature BNF_FP_SUGAR_TACTICS = |
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sig |
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val mk_case_tac: Proof.context -> int -> int -> int -> thm -> thm -> thm -> tactic |
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val mk_exhaust_tac: Proof.context -> int -> thm list -> thm -> thm -> tactic |
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val mk_fld_iff_unf_tac: Proof.context -> ctyp option list -> cterm -> cterm -> thm -> thm |
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-> tactic |
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val mk_half_distinct_tac: Proof.context -> thm -> thm list -> tactic |
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val mk_inject_tac: Proof.context -> thm -> thm -> tactic |
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val mk_iter_or_rec_tac: thm list -> thm list -> thm -> thm -> Proof.context -> tactic |
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end; |
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structure BNF_FP_Sugar_Tactics : BNF_FP_SUGAR_TACTICS = |
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struct |
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open BNF_Tactics |
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open BNF_Util |
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fun mk_case_tac ctxt n k m case_def ctr_def unf_fld = |
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Local_Defs.unfold_tac ctxt [case_def, ctr_def, unf_fld] THEN |
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(rtac (BNF_FP_Util.mk_sum_casesN n k RS ssubst) THEN' |
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REPEAT_DETERM_N (Int.max (0, m - 1)) o rtac (@{thm split} RS ssubst) THEN' |
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rtac refl) 1; |
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fun mk_exhaust_tac ctxt n ctr_defs fld_iff_unf sumEN' = |
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Local_Defs.unfold_tac ctxt (fld_iff_unf :: ctr_defs) THEN rtac sumEN' 1 THEN |
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Local_Defs.unfold_tac ctxt @{thms all_prod_eq} THEN |
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EVERY' (maps (fn k => [select_prem_tac n (rotate_tac 1) k, REPEAT_DETERM o dtac @{thm meta_spec}, |
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etac @{thm meta_mp}, atac]) (1 upto n)) 1; |
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fun mk_fld_iff_unf_tac ctxt cTs cfld cunf fld_unf unf_fld = |
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(rtac iffI THEN' |
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EVERY' (map3 (fn cTs => fn cx => fn th => |
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dtac (Drule.instantiate' cTs [NONE, NONE, SOME cx] arg_cong) THEN' |
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SELECT_GOAL (Local_Defs.unfold_tac ctxt [th]) THEN' |
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atac) [rev cTs, cTs] [cunf, cfld] [unf_fld, fld_unf])) 1; |
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fun mk_half_distinct_tac ctxt fld_inject ctr_defs = |
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Local_Defs.unfold_tac ctxt (fld_inject :: @{thms sum.inject} @ ctr_defs) THEN |
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rtac @{thm sum.distinct(1)} 1; |
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fun mk_inject_tac ctxt ctr_def fld_inject = |
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Local_Defs.unfold_tac ctxt [ctr_def] THEN rtac (fld_inject RS ssubst) 1 THEN |
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Local_Defs.unfold_tac ctxt @{thms sum.inject Pair_eq conj_assoc} THEN rtac refl 1; |
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val iter_or_rec_thms = |
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@{thms sum_map.simps sum.simps(5,6) convol_def case_unit map_pair_def split_conv id_def}; |
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fun mk_iter_or_rec_tac iter_or_rec_defs fld_iter_or_recs ctr_def bnf_map_def ctxt = |
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Local_Defs.unfold_tac ctxt (ctr_def :: bnf_map_def :: iter_or_rec_defs @ fld_iter_or_recs) THEN |
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Local_Defs.unfold_tac ctxt iter_or_rec_thms THEN rtac refl 1; |
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end; |