author  paulson 
Thu, 14 Jun 2018 14:23:48 +0100  
changeset 68446  92ddca1edc43 
parent 59498  50b60f501b05 
permissions  rwrr 
19761  1 
(* Title: CTT/rew.ML 
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Author: Lawrence C Paulson, Cambridge University Computer Laboratory 
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Copyright 1991 University of Cambridge 
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Simplifier for CTT, using Typedsimp. 
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*) 
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(*Make list of ProdE RS ProdE ... RS ProdE RS EqE 

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for using assumptions as rewrite rules*) 

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fun peEs 0 = [] 

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 peEs n = @{thm EqE} :: map (curry (op RS) @{thm ProdE}) (peEs (n1)); 
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(*Tactic used for proving conditions for the cond_rls*) 

59498
50b60f501b05
proper context for resolve_tac, eresolve_tac, dresolve_tac, forward_tac etc.;
wenzelm
parents:
58963
diff
changeset

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fun prove_cond_tac ctxt = eresolve_tac ctxt (peEs 5); 
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structure TSimp_data: TSIMP_DATA = 

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struct 

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val refl = @{thm refl_elem} 
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val sym = @{thm sym_elem} 

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val trans = @{thm trans_elem} 

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val refl_red = @{thm refl_red} 

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val trans_red = @{thm trans_red} 

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val red_if_equal = @{thm red_if_equal} 

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val default_rls = @{thms comp_rls} 

58963
26bf09b95dda
proper context for assume_tac (atac remains as fallback without context);
wenzelm
parents:
39159
diff
changeset

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val routine_tac = routine_tac @{thms routine_rls} 
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end; 
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structure TSimp = TSimpFun (TSimp_data); 

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val standard_congr_rls = @{thms intrL2_rls} @ @{thms elimL_rls}; 
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(*Make a rewriting tactic from a normalization tactic*) 

58963
26bf09b95dda
proper context for assume_tac (atac remains as fallback without context);
wenzelm
parents:
39159
diff
changeset

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fun make_rew_tac ctxt ntac = 
59498
50b60f501b05
proper context for resolve_tac, eresolve_tac, dresolve_tac, forward_tac etc.;
wenzelm
parents:
58963
diff
changeset

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TRY (eqintr_tac ctxt) THEN TRYALL (resolve_tac ctxt [TSimp.split_eqn]) THEN 
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ntac; 
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58963
26bf09b95dda
proper context for assume_tac (atac remains as fallback without context);
wenzelm
parents:
39159
diff
changeset

38 
fun rew_tac ctxt thms = make_rew_tac ctxt 
26bf09b95dda
proper context for assume_tac (atac remains as fallback without context);
wenzelm
parents:
39159
diff
changeset

39 
(TSimp.norm_tac ctxt (standard_congr_rls, thms)); 
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58963
26bf09b95dda
proper context for assume_tac (atac remains as fallback without context);
wenzelm
parents:
39159
diff
changeset

41 
fun hyp_rew_tac ctxt thms = make_rew_tac ctxt 
59498
50b60f501b05
proper context for resolve_tac, eresolve_tac, dresolve_tac, forward_tac etc.;
wenzelm
parents:
58963
diff
changeset

42 
(TSimp.cond_norm_tac ctxt (prove_cond_tac ctxt, standard_congr_rls, thms)); 