author | nipkow |
Thu, 30 Oct 1997 09:46:11 +0100 | |
changeset 4033 | 43ec35b5054d |
parent 3919 | c036caebfc75 |
child 4072 | d0d32dd77440 |
permissions | -rw-r--r-- |
1300 | 1 |
(* Title: HOL/MiniML/W.ML |
2 |
ID: $Id$ |
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3 |
Author: Dieter Nazareth and Tobias Nipkow |
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4 |
Copyright 1995 TU Muenchen |
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5 |
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6 |
Correctness and completeness of type inference algorithm W |
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7 |
*) |
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8 |
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9 |
open W; |
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10 |
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2525 | 11 |
Addsimps [diff_add_inverse,diff_add_inverse2,Suc_le_lessD]; |
1300 | 12 |
|
13 |
val has_type_casesE = map(has_type.mk_cases expr.simps) |
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2525 | 14 |
[" A |- Var n :: t"," A |- Abs e :: t","A |- App e1 e2 ::t","A |- LET e1 e2 ::t" ]; |
1300 | 15 |
|
16 |
(* the resulting type variable is always greater or equal than the given one *) |
|
17 |
goal thy |
|
2525 | 18 |
"!A n S t m. W e A n = Some (S,t,m) --> n<=m"; |
1300 | 19 |
by (expr.induct_tac "e" 1); |
20 |
(* case Var(n) *) |
|
3919 | 21 |
by (simp_tac (!simpset addsplits [expand_option_bind,expand_if]) 1); |
1300 | 22 |
(* case Abs e *) |
3919 | 23 |
by (simp_tac (!simpset addsplits [expand_option_bind]) 1); |
1300 | 24 |
by (fast_tac (HOL_cs addDs [Suc_leD]) 1); |
25 |
(* case App e1 e2 *) |
|
3919 | 26 |
by (simp_tac (!simpset addsplits [expand_option_bind]) 1); |
4033 | 27 |
by(blast_tac (!claset addIs [le_SucI,le_trans]) 1); |
2525 | 28 |
(* case LET e1 e2 *) |
3919 | 29 |
by (simp_tac (!simpset addsplits [expand_option_bind]) 1); |
4033 | 30 |
by(blast_tac (!claset addIs [le_trans]) 1); |
1486 | 31 |
qed_spec_mp "W_var_ge"; |
1300 | 32 |
|
33 |
Addsimps [W_var_ge]; |
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34 |
||
35 |
goal thy |
|
2525 | 36 |
"!! s. Some (S,t,m) = W e A n ==> n<=m"; |
1300 | 37 |
by (asm_full_simp_tac (!simpset addsimps [eq_sym_conv]) 1); |
38 |
qed "W_var_geD"; |
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39 |
||
2525 | 40 |
goal thy "!! s. new_tv n A ==> Some (S,t,m) = W e A n ==> new_tv m A"; |
41 |
by (dtac W_var_geD 1); |
|
42 |
by (rtac new_scheme_list_le 1); |
|
3018 | 43 |
by (assume_tac 1); |
44 |
by (assume_tac 1); |
|
2525 | 45 |
qed "new_tv_compatible_W"; |
1300 | 46 |
|
2525 | 47 |
goal thy "!!sch. new_tv n sch --> new_tv (n + (min_new_bound_tv sch)) (bound_typ_inst (%b. TVar (b + n)) sch)"; |
48 |
by (type_scheme.induct_tac "sch" 1); |
|
49 |
by (Asm_full_simp_tac 1); |
|
50 |
by (asm_full_simp_tac (!simpset addsimps [add_commute]) 1); |
|
51 |
by (strip_tac 1); |
|
52 |
by (Asm_full_simp_tac 1); |
|
53 |
by (etac conjE 1); |
|
54 |
by (rtac conjI 1); |
|
55 |
by (rtac new_tv_le 1); |
|
56 |
by (mp_tac 2); |
|
57 |
by (mp_tac 2); |
|
3018 | 58 |
by (assume_tac 2); |
2525 | 59 |
by (rtac add_le_mono 1); |
60 |
by (Simp_tac 1); |
|
3919 | 61 |
by (simp_tac (!simpset addsplits [expand_if] addsimps [max_def]) 1); |
2525 | 62 |
by (strip_tac 1); |
63 |
by (rtac new_tv_le 1); |
|
64 |
by (mp_tac 2); |
|
65 |
by (mp_tac 2); |
|
3018 | 66 |
by (assume_tac 2); |
2525 | 67 |
by (rtac add_le_mono 1); |
68 |
by (Simp_tac 1); |
|
3919 | 69 |
by (simp_tac (!simpset addsplits [expand_if] addsimps [max_def]) 1); |
2525 | 70 |
by (strip_tac 1); |
71 |
by (dtac not_leE 1); |
|
72 |
by (rtac less_or_eq_imp_le 1); |
|
73 |
by (Fast_tac 1); |
|
74 |
qed_spec_mp "new_tv_bound_typ_inst_sch"; |
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75 |
||
76 |
Addsimps [new_tv_bound_typ_inst_sch]; |
|
1300 | 77 |
|
78 |
(* resulting type variable is new *) |
|
79 |
goal thy |
|
2525 | 80 |
"!n A S t m. new_tv n A --> W e A n = Some (S,t,m) --> \ |
81 |
\ new_tv m S & new_tv m t"; |
|
1300 | 82 |
by (expr.induct_tac "e" 1); |
83 |
(* case Var n *) |
|
3919 | 84 |
by (simp_tac (!simpset addsplits [expand_option_bind,expand_if]) 1); |
2525 | 85 |
by (strip_tac 1); |
86 |
by (dtac new_tv_nth_nat_A 1); |
|
3018 | 87 |
by (assume_tac 1); |
4033 | 88 |
by (Asm_simp_tac 1); |
1300 | 89 |
(* case Abs e *) |
90 |
by (simp_tac (!simpset addsimps [new_tv_subst,new_tv_Suc_list] |
|
3919 | 91 |
addsplits [expand_option_bind]) 1); |
1300 | 92 |
by (strip_tac 1); |
93 |
by (eres_inst_tac [("x","Suc n")] allE 1); |
|
2525 | 94 |
by (eres_inst_tac [("x","(FVar n)#A")] allE 1); |
1300 | 95 |
by (fast_tac (HOL_cs addss (!simpset |
1465 | 96 |
addsimps [new_tv_subst,new_tv_Suc_list])) 1); |
1300 | 97 |
(* case App e1 e2 *) |
3919 | 98 |
by (simp_tac (!simpset addsplits [expand_option_bind]) 1); |
1300 | 99 |
by (strip_tac 1); |
4033 | 100 |
by (rename_tac "S1 t1 n1 S2 t2 n2 S3" 1); |
1300 | 101 |
by (eres_inst_tac [("x","n")] allE 1); |
2525 | 102 |
by (eres_inst_tac [("x","A")] allE 1); |
4033 | 103 |
by (eres_inst_tac [("x","S1")] allE 1); |
104 |
by (eres_inst_tac [("x","t1")] allE 1); |
|
2525 | 105 |
by (eres_inst_tac [("x","n1")] allE 1); |
106 |
by (eres_inst_tac [("x","n1")] allE 1); |
|
107 |
by (asm_full_simp_tac (!simpset addsimps [eq_sym_conv] delsimps all_simps) 1); |
|
4033 | 108 |
by (eres_inst_tac [("x","$S1 A")] allE 1); |
109 |
by (eres_inst_tac [("x","S2")] allE 1); |
|
110 |
by (eres_inst_tac [("x","t2")] allE 1); |
|
2525 | 111 |
by (eres_inst_tac [("x","n2")] allE 1); |
3018 | 112 |
by ( asm_full_simp_tac (!simpset addsimps [o_def,rotate_Some]) 1); |
1300 | 113 |
by (rtac conjI 1); |
114 |
by (rtac new_tv_subst_comp_2 1); |
|
115 |
by (rtac new_tv_subst_comp_2 1); |
|
2525 | 116 |
by (rtac (lessI RS less_imp_le RS new_tv_le) 1); |
117 |
by (res_inst_tac [("n","n1")] new_tv_subst_le 1); |
|
118 |
by (asm_full_simp_tac (!simpset addsimps [rotate_Some]) 1); |
|
1300 | 119 |
by (Asm_simp_tac 1); |
120 |
by (fast_tac (HOL_cs addDs [W_var_geD] addIs |
|
2525 | 121 |
[new_scheme_list_le,new_tv_subst_scheme_list,lessI RS less_imp_le RS new_tv_subst_le]) |
1300 | 122 |
1); |
1465 | 123 |
by (etac (sym RS mgu_new) 1); |
2525 | 124 |
by (best_tac (HOL_cs addDs [W_var_geD] addIs [new_tv_subst_te,new_scheme_list_le, |
125 |
new_tv_subst_scheme_list,lessI RS less_imp_le RS new_tv_le,lessI RS less_imp_le RS |
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126 |
new_tv_subst_le,new_tv_le]) 1); |
|
127 |
by (fast_tac (HOL_cs addDs [W_var_geD] addIs |
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128 |
[new_scheme_list_le,new_tv_subst_scheme_list,new_tv_le] |
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129 |
addss (!simpset)) 1); |
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1465 | 130 |
by (rtac (lessI RS new_tv_subst_var) 1); |
131 |
by (etac (sym RS mgu_new) 1); |
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1925 | 132 |
by (best_tac (HOL_cs addSIs [lessI RS less_imp_le RS new_tv_le,new_tv_subst_te] |
2525 | 133 |
addDs [W_var_geD] addIs |
134 |
[new_scheme_list_le,new_tv_subst_scheme_list,lessI RS less_imp_le RS |
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135 |
new_tv_subst_le,new_tv_le] addss !simpset) 1); |
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136 |
by (fast_tac (HOL_cs addDs [W_var_geD] addIs |
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137 |
[new_scheme_list_le,new_tv_subst_scheme_list,new_tv_le] |
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138 |
addss (!simpset)) 1); |
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4033 | 139 |
(* 41: case LET e1 e2 *) |
3919 | 140 |
by (simp_tac (!simpset addsplits [expand_option_bind]) 1); |
2525 | 141 |
by (strip_tac 1); |
4033 | 142 |
by(EVERY1[etac allE,etac allE,etac allE,etac allE,etac allE,mp_tac,mp_tac]); |
2525 | 143 |
by (etac conjE 1); |
4033 | 144 |
by(EVERY[etac allE 1,etac allE 1,etac allE 1,etac allE 1,etac allE 1, |
145 |
etac impE 1, mp_tac 2]); |
|
146 |
by (SELECT_GOAL(rewtac new_tv_def)1); |
|
147 |
by (Asm_simp_tac 1); |
|
148 |
by (REPEAT(dtac W_var_ge 1)); |
|
149 |
by (rtac allI 1); |
|
150 |
by (strip_tac 1); |
|
151 |
by (SELECT_GOAL(rewtac free_tv_subst) 1); |
|
152 |
by (dtac (free_tv_app_subst_scheme_list RS subsetD) 1); |
|
153 |
by (best_tac (!claset addEs [less_le_trans]) 1); |
|
2525 | 154 |
by (etac conjE 1); |
155 |
by (rtac conjI 1); |
|
156 |
by (rtac new_tv_subst_comp_2 1); |
|
4033 | 157 |
by (etac (W_var_ge RS new_tv_subst_le) 1); |
3018 | 158 |
by (assume_tac 1); |
159 |
by (assume_tac 1); |
|
160 |
by (assume_tac 1); |
|
1486 | 161 |
qed_spec_mp "new_tv_W"; |
1300 | 162 |
|
2525 | 163 |
goal thy "!!sch. (v ~: free_tv sch) --> (v : free_tv (bound_typ_inst (TVar o S) sch)) --> (? x. v = S x)"; |
164 |
by (type_scheme.induct_tac "sch" 1); |
|
165 |
by (Asm_full_simp_tac 1); |
|
166 |
by (Asm_full_simp_tac 1); |
|
167 |
by (strip_tac 1); |
|
168 |
by (rtac exI 1); |
|
169 |
by (rtac refl 1); |
|
170 |
by (Asm_full_simp_tac 1); |
|
171 |
qed_spec_mp "free_tv_bound_typ_inst1"; |
|
172 |
||
173 |
Addsimps [free_tv_bound_typ_inst1]; |
|
1300 | 174 |
|
175 |
goal thy |
|
2525 | 176 |
"!n A S t m v. W e A n = Some (S,t,m) --> \ |
177 |
\ (v:free_tv S | v:free_tv t) --> v<n --> v:free_tv A"; |
|
1300 | 178 |
by (expr.induct_tac "e" 1); |
179 |
(* case Var n *) |
|
2525 | 180 |
by (simp_tac (!simpset addsimps |
3919 | 181 |
[free_tv_subst] addsplits [expand_option_bind,expand_if]) 1); |
2525 | 182 |
by (strip_tac 1); |
183 |
by (case_tac "v : free_tv (nth nat A)" 1); |
|
184 |
by (Asm_full_simp_tac 1); |
|
185 |
by (dtac free_tv_bound_typ_inst1 1); |
|
186 |
by (simp_tac (!simpset addsimps [o_def]) 1); |
|
187 |
by (etac exE 1); |
|
188 |
by (rotate_tac 3 1); |
|
189 |
by (Asm_full_simp_tac 1); |
|
1300 | 190 |
(* case Abs e *) |
191 |
by (asm_full_simp_tac (!simpset addsimps |
|
3919 | 192 |
[free_tv_subst] addsplits [expand_option_bind] delsimps all_simps) 1); |
1300 | 193 |
by (strip_tac 1); |
2525 | 194 |
by (rename_tac "S t n1 S1 t1 m v" 1); |
1300 | 195 |
by (eres_inst_tac [("x","Suc n")] allE 1); |
2525 | 196 |
by (eres_inst_tac [("x","FVar n # A")] allE 1); |
197 |
by (eres_inst_tac [("x","S")] allE 1); |
|
1300 | 198 |
by (eres_inst_tac [("x","t")] allE 1); |
2525 | 199 |
by (eres_inst_tac [("x","n1")] allE 1); |
1300 | 200 |
by (eres_inst_tac [("x","v")] allE 1); |
2525 | 201 |
by (best_tac (HOL_cs addIs [cod_app_subst] |
1669 | 202 |
addss (!simpset addsimps [less_Suc_eq])) 1); |
1300 | 203 |
(* case App e1 e2 *) |
3919 | 204 |
by (simp_tac (!simpset addsplits [expand_option_bind] delsimps all_simps) 1); |
1300 | 205 |
by (strip_tac 1); |
2525 | 206 |
by (rename_tac "S t n1 S1 t1 n2 S2 S3 t2 m v" 1); |
1300 | 207 |
by (eres_inst_tac [("x","n")] allE 1); |
2525 | 208 |
by (eres_inst_tac [("x","A")] allE 1); |
209 |
by (eres_inst_tac [("x","S")] allE 1); |
|
1300 | 210 |
by (eres_inst_tac [("x","t")] allE 1); |
2525 | 211 |
by (eres_inst_tac [("x","n1")] allE 1); |
212 |
by (eres_inst_tac [("x","n1")] allE 1); |
|
1300 | 213 |
by (eres_inst_tac [("x","v")] allE 1); |
214 |
(* second case *) |
|
2525 | 215 |
by (eres_inst_tac [("x","$ S A")] allE 1); |
216 |
by (eres_inst_tac [("x","S1")] allE 1); |
|
217 |
by (eres_inst_tac [("x","t1")] allE 1); |
|
218 |
by (eres_inst_tac [("x","n2")] allE 1); |
|
1300 | 219 |
by (eres_inst_tac [("x","v")] allE 1); |
220 |
by (safe_tac (empty_cs addSIs [conjI,impI] addSEs [conjE]) ); |
|
2525 | 221 |
by (asm_full_simp_tac (!simpset addsimps [rotate_Some,o_def]) 1); |
1465 | 222 |
by (dtac W_var_geD 1); |
223 |
by (dtac W_var_geD 1); |
|
1300 | 224 |
by ( (forward_tac [less_le_trans] 1) THEN (assume_tac 1) ); |
225 |
by (fast_tac (HOL_cs addDs [free_tv_comp_subst RS subsetD,sym RS mgu_free, |
|
2525 | 226 |
codD,free_tv_app_subst_te RS subsetD,free_tv_app_subst_scheme_list RS subsetD, |
1300 | 227 |
less_le_trans,less_not_refl2,subsetD] |
228 |
addEs [UnE] |
|
229 |
addss !simpset) 1); |
|
230 |
by (Asm_full_simp_tac 1); |
|
1465 | 231 |
by (dtac (sym RS W_var_geD) 1); |
232 |
by (dtac (sym RS W_var_geD) 1); |
|
1300 | 233 |
by ( (forward_tac [less_le_trans] 1) THEN (assume_tac 1) ); |
234 |
by (fast_tac (HOL_cs addDs [mgu_free, codD,free_tv_subst_var RS subsetD, |
|
2525 | 235 |
free_tv_app_subst_te RS subsetD,free_tv_app_subst_scheme_list RS subsetD, |
236 |
less_le_trans,subsetD] |
|
237 |
addEs [UnE] |
|
238 |
addss !simpset) 1); |
|
239 |
(* LET e1 e2 *) |
|
3919 | 240 |
by (simp_tac (!simpset addsplits [expand_option_bind] delsimps all_simps) 1); |
2525 | 241 |
by (strip_tac 1); |
242 |
by (rename_tac "nat A S1 t1 n2 S2 t2 m2 S t m v" 1); |
|
243 |
by (eres_inst_tac [("x","nat")] allE 1); |
|
244 |
by (eres_inst_tac [("x","A")] allE 1); |
|
245 |
by (eres_inst_tac [("x","S1")] allE 1); |
|
246 |
by (eres_inst_tac [("x","t1")] allE 1); |
|
247 |
by (rotate_tac 1 1); |
|
248 |
by (eres_inst_tac [("x","n2")] allE 1); |
|
249 |
by (rotate_tac 4 1); |
|
250 |
by (eres_inst_tac [("x","v")] allE 1); |
|
251 |
by (mp_tac 1); |
|
252 |
by (EVERY1 [etac allE,etac allE,etac allE,etac allE,etac allE,eres_inst_tac [("x","v")] allE]); |
|
253 |
by (mp_tac 1); |
|
254 |
by (Asm_full_simp_tac 1); |
|
255 |
by (rtac conjI 1); |
|
256 |
by (fast_tac (!claset addSDs [codD,free_tv_app_subst_scheme_list RS subsetD,free_tv_o_subst RS subsetD,W_var_ge] |
|
257 |
addDs [less_le_trans]) 1); |
|
258 |
by (fast_tac (!claset addSDs [codD,free_tv_app_subst_scheme_list RS subsetD,W_var_ge] |
|
259 |
addDs [less_le_trans]) 1); |
|
1486 | 260 |
qed_spec_mp "free_tv_W"; |
1300 | 261 |
|
2525 | 262 |
goal thy "!!A. (!x. x : A --> x ~: B) ==> A Int B = {}"; |
263 |
by (Fast_tac 1); |
|
2625 | 264 |
val weaken_A_Int_B_eq_empty = result(); |
2525 | 265 |
|
266 |
goal thy "!!A. x ~: A | x : B ==> x ~: A - B"; |
|
267 |
by (Fast_tac 1); |
|
2625 | 268 |
val weaken_not_elem_A_minus_B = result(); |
2525 | 269 |
|
270 |
(* correctness of W with respect to has_type *) |
|
271 |
goal W.thy |
|
272 |
"!A S t m n . new_tv n A --> Some (S,t,m) = W e A n --> $S A |- e :: t"; |
|
273 |
by (expr.induct_tac "e" 1); |
|
274 |
(* case Var n *) |
|
3919 | 275 |
by (asm_full_simp_tac (!simpset addsplits [expand_if]) 1); |
2525 | 276 |
by (strip_tac 1); |
277 |
by (rtac has_type.VarI 1); |
|
278 |
by (Simp_tac 1); |
|
279 |
by (simp_tac (!simpset addsimps [is_bound_typ_instance]) 1); |
|
280 |
by (rtac exI 1); |
|
281 |
by (rtac refl 1); |
|
282 |
(* case Abs e *) |
|
283 |
by (asm_full_simp_tac (!simpset addsimps [app_subst_list] |
|
3919 | 284 |
addsplits [expand_option_bind]) 1); |
2525 | 285 |
by (strip_tac 1); |
286 |
by (eres_inst_tac [("x","(mk_scheme (TVar n)) # A")] allE 1); |
|
287 |
by (Asm_full_simp_tac 1); |
|
288 |
by (rtac has_type.AbsI 1); |
|
289 |
by (dtac (le_refl RS le_SucI RS new_scheme_list_le) 1); |
|
3018 | 290 |
by (dtac sym 1); |
2525 | 291 |
by (REPEAT (etac allE 1)); |
292 |
by (etac impE 1); |
|
293 |
by (mp_tac 2); |
|
294 |
by (Asm_simp_tac 1); |
|
3018 | 295 |
by (assume_tac 1); |
2525 | 296 |
(* case App e1 e2 *) |
3919 | 297 |
by (simp_tac (!simpset addsplits [expand_option_bind]) 1); |
2525 | 298 |
by (strip_tac 1); |
299 |
by (rename_tac "S1 t1 n1 S2 t2 n2 S3" 1); |
|
300 |
by (res_inst_tac [("t2.0","$ S3 t2")] has_type.AppI 1); |
|
301 |
by (res_inst_tac [("S1","S3")] (app_subst_TVar RS subst) 1); |
|
302 |
by (rtac (app_subst_Fun RS subst) 1); |
|
303 |
by (res_inst_tac [("t","$S3 (t2 -> (TVar n2))"),("s","$S3 ($S2 t1)")] subst 1); |
|
304 |
by (Asm_full_simp_tac 1); |
|
305 |
by (simp_tac (HOL_ss addsimps [subst_comp_scheme_list RS sym]) 1); |
|
306 |
by ((rtac (has_type_cl_sub RS spec) 1) THEN (rtac (has_type_cl_sub RS spec) 1)); |
|
307 |
by (asm_full_simp_tac (!simpset addsimps [eq_sym_conv]) 1); |
|
308 |
by (asm_full_simp_tac (!simpset addsimps [subst_comp_scheme_list RS sym,o_def,has_type_cl_sub,eq_sym_conv]) 1); |
|
309 |
by (rtac (has_type_cl_sub RS spec) 1); |
|
310 |
by (forward_tac [new_tv_W] 1); |
|
3018 | 311 |
by (assume_tac 1); |
2525 | 312 |
by (dtac conjunct1 1); |
313 |
by (dtac conjunct1 1); |
|
314 |
by (forward_tac [new_tv_subst_scheme_list] 1); |
|
315 |
by (rtac new_scheme_list_le 1); |
|
316 |
by (rtac W_var_ge 1); |
|
3018 | 317 |
by (assume_tac 1); |
318 |
by (assume_tac 1); |
|
2525 | 319 |
by (etac thin_rl 1); |
320 |
by (REPEAT (etac allE 1)); |
|
3018 | 321 |
by (dtac sym 1); |
322 |
by (dtac sym 1); |
|
2525 | 323 |
by (etac thin_rl 1); |
324 |
by (etac thin_rl 1); |
|
325 |
by (mp_tac 1); |
|
326 |
by (mp_tac 1); |
|
3018 | 327 |
by (assume_tac 1); |
2525 | 328 |
(* case Let e1 e2 *) |
3919 | 329 |
by (simp_tac (!simpset addsplits [expand_option_bind]) 1); |
2525 | 330 |
by (strip_tac 1); |
331 |
by (rename_tac "w q m1 S1 t1 m2 S2 t n2" 1); |
|
332 |
by (res_inst_tac [("t1.0","$ S2 t1")] has_type.LETI 1); |
|
333 |
by (simp_tac (!simpset addsimps [o_def]) 1); |
|
334 |
by (simp_tac (HOL_ss addsimps [subst_comp_scheme_list RS sym]) 1); |
|
335 |
by (rtac (has_type_cl_sub RS spec) 1); |
|
336 |
by (dres_inst_tac [("x","A")] spec 1); |
|
337 |
by (dres_inst_tac [("x","S1")] spec 1); |
|
338 |
by (dres_inst_tac [("x","t1")] spec 1); |
|
339 |
by (dres_inst_tac [("x","m2")] spec 1); |
|
340 |
by (rotate_tac 4 1); |
|
341 |
by (dres_inst_tac [("x","m1")] spec 1); |
|
342 |
by (mp_tac 1); |
|
343 |
by (asm_full_simp_tac (!simpset addsimps [eq_sym_conv]) 1); |
|
344 |
by (simp_tac (!simpset addsimps [o_def]) 1); |
|
345 |
by (simp_tac (HOL_ss addsimps [subst_comp_scheme_list RS sym]) 1); |
|
346 |
by (rtac (gen_subst_commutes RS sym RS subst) 1); |
|
347 |
by (rtac (app_subst_Cons RS subst) 2); |
|
348 |
by (etac thin_rl 2); |
|
349 |
by (dres_inst_tac [("x","gen ($S1 A) t1 # $ S1 A")] spec 2); |
|
350 |
by (dres_inst_tac [("x","S2")] spec 2); |
|
351 |
by (dres_inst_tac [("x","t")] spec 2); |
|
352 |
by (dres_inst_tac [("x","n2")] spec 2); |
|
353 |
by (dres_inst_tac [("x","m2")] spec 2); |
|
354 |
by (forward_tac [new_tv_W] 2); |
|
3018 | 355 |
by (assume_tac 2); |
2525 | 356 |
by (dtac conjunct1 2); |
357 |
by (dtac conjunct1 2); |
|
358 |
by (forward_tac [new_tv_subst_scheme_list] 2); |
|
359 |
by (rtac new_scheme_list_le 2); |
|
360 |
by (rtac W_var_ge 2); |
|
3018 | 361 |
by (assume_tac 2); |
362 |
by (assume_tac 2); |
|
2525 | 363 |
by (etac impE 2); |
364 |
by (res_inst_tac [("A","$ S1 A")] new_tv_only_depends_on_free_tv_scheme_list 2); |
|
365 |
by (Simp_tac 2); |
|
366 |
by (Fast_tac 2); |
|
3018 | 367 |
by (assume_tac 2); |
2525 | 368 |
by (Asm_full_simp_tac 2); |
369 |
by (rtac weaken_A_Int_B_eq_empty 1); |
|
370 |
by (rtac allI 1); |
|
371 |
by (strip_tac 1); |
|
372 |
by (rtac weaken_not_elem_A_minus_B 1); |
|
373 |
by (case_tac "x < m2" 1); |
|
374 |
by (rtac disjI2 1); |
|
375 |
by (rtac (free_tv_gen_cons RS subst) 1); |
|
376 |
by (rtac free_tv_W 1); |
|
3018 | 377 |
by (assume_tac 1); |
2525 | 378 |
by (Asm_full_simp_tac 1); |
3018 | 379 |
by (assume_tac 1); |
2525 | 380 |
by (rtac disjI1 1); |
381 |
by (dtac new_tv_W 1); |
|
3018 | 382 |
by (assume_tac 1); |
2525 | 383 |
by (dtac conjunct2 1); |
384 |
by (dtac conjunct2 1); |
|
385 |
by (rtac new_tv_not_free_tv 1); |
|
386 |
by (rtac new_tv_le 1); |
|
3018 | 387 |
by (assume_tac 2); |
2525 | 388 |
by (asm_full_simp_tac (!simpset addsimps [not_less_iff_le]) 1); |
389 |
qed_spec_mp "W_correct_lemma"; |
|
390 |
||
391 |
goal Arith.thy "!!n::nat. ~ k+n < n"; |
|
392 |
by (nat_ind_tac "k" 1); |
|
3018 | 393 |
by (ALLGOALS Asm_simp_tac); |
394 |
by (trans_tac 1); |
|
2625 | 395 |
val not_add_less1 = result(); |
2525 | 396 |
Addsimps [not_add_less1]; |
2083
b56425a385b9
Tidied some proofs: changed needed for de Morgan laws
paulson
parents:
2058
diff
changeset
|
397 |
|
1300 | 398 |
(* Completeness of W w.r.t. has_type *) |
399 |
goal thy |
|
2525 | 400 |
"!S' A t' n. $S' A |- e :: t' --> new_tv n A --> \ |
401 |
\ (? S t. (? m. W e A n = Some (S,t,m)) & \ |
|
402 |
\ (? R. $S' A = $R ($S A) & t' = $R t))"; |
|
1300 | 403 |
by (expr.induct_tac "e" 1); |
404 |
(* case Var n *) |
|
405 |
by (strip_tac 1); |
|
3919 | 406 |
by (simp_tac (!simpset addcongs [conj_cong] addsplits [expand_if]) 1); |
1300 | 407 |
by (eresolve_tac has_type_casesE 1); |
2525 | 408 |
by (asm_full_simp_tac (!simpset addsimps [is_bound_typ_instance]) 1); |
409 |
by (etac exE 1); |
|
410 |
by (hyp_subst_tac 1); |
|
411 |
by (rename_tac "S" 1); |
|
412 |
by (res_inst_tac [("x","%x. (if x < n then S' x else S (x - n))")] exI 1); |
|
413 |
by (rtac conjI 1); |
|
1300 | 414 |
by (Asm_simp_tac 1); |
2525 | 415 |
by (asm_simp_tac (!simpset addsimps [(bound_typ_inst_composed_subst RS sym),new_tv_nth_nat_A,o_def,nth_subst] |
416 |
delsimps [bound_typ_inst_composed_subst]) 1); |
|
2749
2f477a0e690d
Deleted steps made redundant by the stronger eq_assume_tac
paulson
parents:
2637
diff
changeset
|
417 |
(** LEVEL 12 **) |
1300 | 418 |
(* case Abs e *) |
419 |
by (strip_tac 1); |
|
420 |
by (eresolve_tac has_type_casesE 1); |
|
3842 | 421 |
by (eres_inst_tac [("x","%x. if x=n then t1 else (S' x)")] allE 1); |
2525 | 422 |
by (eres_inst_tac [("x","(FVar n)#A")] allE 1); |
1300 | 423 |
by (eres_inst_tac [("x","t2")] allE 1); |
424 |
by (eres_inst_tac [("x","Suc n")] allE 1); |
|
2749
2f477a0e690d
Deleted steps made redundant by the stronger eq_assume_tac
paulson
parents:
2637
diff
changeset
|
425 |
by (best_tac (HOL_cs addSDs [mk_scheme_injective] |
3207 | 426 |
addss (!simpset addcongs [conj_cong] |
3919 | 427 |
addsplits [expand_option_bind])) 1); |
2749
2f477a0e690d
Deleted steps made redundant by the stronger eq_assume_tac
paulson
parents:
2637
diff
changeset
|
428 |
(** LEVEL 19 **) |
1300 | 429 |
|
430 |
(* case App e1 e2 *) |
|
431 |
by (strip_tac 1); |
|
432 |
by (eresolve_tac has_type_casesE 1); |
|
2525 | 433 |
by (eres_inst_tac [("x","S'")] allE 1); |
434 |
by (eres_inst_tac [("x","A")] allE 1); |
|
1400 | 435 |
by (eres_inst_tac [("x","t2 -> t'")] allE 1); |
1300 | 436 |
by (eres_inst_tac [("x","n")] allE 1); |
437 |
by (safe_tac HOL_cs); |
|
2749
2f477a0e690d
Deleted steps made redundant by the stronger eq_assume_tac
paulson
parents:
2637
diff
changeset
|
438 |
(** LEVEL 26 **) |
2525 | 439 |
by (eres_inst_tac [("x","R")] allE 1); |
440 |
by (eres_inst_tac [("x","$ S A")] allE 1); |
|
1300 | 441 |
by (eres_inst_tac [("x","t2")] allE 1); |
442 |
by (eres_inst_tac [("x","m")] allE 1); |
|
2749
2f477a0e690d
Deleted steps made redundant by the stronger eq_assume_tac
paulson
parents:
2637
diff
changeset
|
443 |
by (rotate_tac ~3 1); |
1300 | 444 |
by (Asm_full_simp_tac 1); |
445 |
by (safe_tac HOL_cs); |
|
2779
9c42ae57b5f4
The contr_tac, which replaces a fast_tac, is needed only because eq_assume_tac
paulson
parents:
2749
diff
changeset
|
446 |
by (contr_tac 1); |
1300 | 447 |
by (fast_tac (HOL_cs addIs [sym RS W_var_geD,new_tv_W RS |
2525 | 448 |
conjunct1,new_scheme_list_le,new_tv_subst_scheme_list]) 1); |
2779
9c42ae57b5f4
The contr_tac, which replaces a fast_tac, is needed only because eq_assume_tac
paulson
parents:
2749
diff
changeset
|
449 |
(** LEVEL 35 **) |
1300 | 450 |
by (subgoal_tac |
3842 | 451 |
"$ (%x. if x=ma then t' else (if x:(free_tv t - free_tv Sa) then R x \ |
2525 | 452 |
\ else Ra x)) ($ Sa t) = \ |
3842 | 453 |
\ $ (%x. if x=ma then t' else (if x:(free_tv t - free_tv Sa) then R x \ |
2525 | 454 |
\ else Ra x)) (ta -> (TVar ma))" 1); |
1300 | 455 |
by (res_inst_tac [("t","$ (%x. if x = ma then t' else \ |
2525 | 456 |
\ (if x:(free_tv t - free_tv Sa) then R x else Ra x)) ($ Sa t)"), |
457 |
("s","($ Ra ta) -> t'")] ssubst 2); |
|
1300 | 458 |
by (asm_simp_tac (!simpset addsimps [subst_comp_te]) 2); |
1465 | 459 |
by (rtac eq_free_eq_subst_te 2); |
1300 | 460 |
by (strip_tac 2); |
461 |
by (subgoal_tac "na ~=ma" 2); |
|
2749
2f477a0e690d
Deleted steps made redundant by the stronger eq_assume_tac
paulson
parents:
2637
diff
changeset
|
462 |
by (best_tac (HOL_cs addDs [new_tv_W,sym RS W_var_geD, |
2525 | 463 |
new_tv_not_free_tv,new_tv_le]) 3); |
464 |
by (case_tac "na:free_tv Sa" 2); |
|
465 |
(* n1 ~: free_tv S1 *) |
|
466 |
by (forward_tac [not_free_impl_id] 3); |
|
3919 | 467 |
by (asm_simp_tac (!simpset addsplits [expand_if]) 3); |
2525 | 468 |
(* na : free_tv Sa *) |
469 |
by (dres_inst_tac [("A1","$ S A")] (subst_comp_scheme_list RSN (2,trans)) 2); |
|
470 |
by (dtac eq_subst_scheme_list_eq_free 2); |
|
1300 | 471 |
by (fast_tac (HOL_cs addIs [free_tv_W,free_tv_le_new_tv] addDs [new_tv_W]) 2); |
472 |
by (Asm_simp_tac 2); |
|
2525 | 473 |
by (case_tac "na:dom Sa" 2); |
474 |
(* na ~: dom Sa *) |
|
3919 | 475 |
by (asm_full_simp_tac (!simpset addsimps [dom_def] addsplits [expand_if]) 3); |
2525 | 476 |
(* na : dom Sa *) |
1465 | 477 |
by (rtac eq_free_eq_subst_te 2); |
1300 | 478 |
by (strip_tac 2); |
479 |
by (subgoal_tac "nb ~= ma" 2); |
|
480 |
by ((forward_tac [new_tv_W] 3) THEN (atac 3)); |
|
1465 | 481 |
by (etac conjE 3); |
2525 | 482 |
by (dtac new_tv_subst_scheme_list 3); |
483 |
by (fast_tac (HOL_cs addIs [new_scheme_list_le] addDs [sym RS W_var_geD]) 3); |
|
1300 | 484 |
by (fast_tac (set_cs addDs [new_tv_W,new_tv_not_free_tv] addss |
2525 | 485 |
(!simpset addsimps [cod_def,free_tv_subst])) 3); |
1300 | 486 |
by (fast_tac (set_cs addss (!simpset addsimps [cod_def,free_tv_subst] |
3919 | 487 |
addsplits [expand_if])) 2); |
1300 | 488 |
by (Simp_tac 2); |
1465 | 489 |
by (rtac eq_free_eq_subst_te 2); |
1300 | 490 |
by (strip_tac 2 ); |
491 |
by (subgoal_tac "na ~= ma" 2); |
|
492 |
by ((forward_tac [new_tv_W] 3) THEN (atac 3)); |
|
1465 | 493 |
by (etac conjE 3); |
494 |
by (dtac (sym RS W_var_geD) 3); |
|
2525 | 495 |
by (fast_tac (HOL_cs addDs [new_scheme_list_le,new_tv_subst_scheme_list,new_tv_W,new_tv_not_free_tv]) 3); |
496 |
by (case_tac "na: free_tv t - free_tv Sa" 2); |
|
497 |
(* case na ~: free_tv t - free_tv Sa *) |
|
3919 | 498 |
by ( asm_full_simp_tac (!simpset addsplits [expand_if]) 3); |
2793
b30c41754c86
Modified proofs because simplifier does not eta-contract any longer.
nipkow
parents:
2779
diff
changeset
|
499 |
by (Fast_tac 3); |
2525 | 500 |
(* case na : free_tv t - free_tv Sa *) |
3919 | 501 |
by ( asm_full_simp_tac (!simpset addsplits [expand_if]) 2); |
2525 | 502 |
by (dres_inst_tac [("A1","$ S A")] (subst_comp_scheme_list RSN (2,trans)) 2); |
503 |
by (dtac eq_subst_scheme_list_eq_free 2); |
|
1300 | 504 |
by (fast_tac (HOL_cs addIs [free_tv_W,free_tv_le_new_tv] addDs [new_tv_W]) 2); |
2793
b30c41754c86
Modified proofs because simplifier does not eta-contract any longer.
nipkow
parents:
2779
diff
changeset
|
505 |
(** LEVEL 75 **) |
2525 | 506 |
by (asm_full_simp_tac (!simpset addsimps [free_tv_subst,dom_def]) 2); |
3919 | 507 |
by (asm_simp_tac (!simpset addsplits [expand_option_bind]) 1); |
1300 | 508 |
by (safe_tac HOL_cs ); |
2525 | 509 |
by (dtac mgu_Some 1); |
3018 | 510 |
by ( fast_tac (HOL_cs addss !simpset) 1); |
2793
b30c41754c86
Modified proofs because simplifier does not eta-contract any longer.
nipkow
parents:
2779
diff
changeset
|
511 |
(** LEVEL 80 *) |
1300 | 512 |
by ((dtac mgu_mg 1) THEN (atac 1)); |
1465 | 513 |
by (etac exE 1); |
2525 | 514 |
by (res_inst_tac [("x","Rb")] exI 1); |
1465 | 515 |
by (rtac conjI 1); |
1300 | 516 |
by (dres_inst_tac [("x","ma")] fun_cong 2); |
3018 | 517 |
by ( asm_full_simp_tac (!simpset addsimps [eq_sym_conv]) 2); |
2525 | 518 |
by (simp_tac (!simpset addsimps [subst_comp_scheme_list]) 1); |
519 |
by (simp_tac (!simpset addsimps [subst_comp_scheme_list RS sym]) 1); |
|
2793
b30c41754c86
Modified proofs because simplifier does not eta-contract any longer.
nipkow
parents:
2779
diff
changeset
|
520 |
by (res_inst_tac [("A2","($ Sa ($ S A))")] |
b30c41754c86
Modified proofs because simplifier does not eta-contract any longer.
nipkow
parents:
2779
diff
changeset
|
521 |
((subst_comp_scheme_list RS sym) RSN (2,trans)) 1); |
3018 | 522 |
by ( asm_full_simp_tac (!simpset addsimps [o_def,eq_sym_conv]) 1); |
2525 | 523 |
by (rtac eq_free_eq_subst_scheme_list 1); |
3018 | 524 |
by ( safe_tac HOL_cs ); |
1300 | 525 |
by (subgoal_tac "ma ~= na" 1); |
526 |
by ((forward_tac [new_tv_W] 2) THEN (atac 2)); |
|
1465 | 527 |
by (etac conjE 2); |
2525 | 528 |
by (dtac new_tv_subst_scheme_list 2); |
529 |
by (fast_tac (HOL_cs addIs [new_scheme_list_le] addDs [sym RS W_var_geD]) 2); |
|
2793
b30c41754c86
Modified proofs because simplifier does not eta-contract any longer.
nipkow
parents:
2779
diff
changeset
|
530 |
by (forw_inst_tac [("n","m")] new_tv_W 2 THEN atac 2); |
1465 | 531 |
by (etac conjE 2); |
2525 | 532 |
by (dtac (free_tv_app_subst_scheme_list RS subsetD) 2); |
2793
b30c41754c86
Modified proofs because simplifier does not eta-contract any longer.
nipkow
parents:
2779
diff
changeset
|
533 |
by (fast_tac (set_cs addDs [sym RS W_var_geD,new_scheme_list_le,codD, |
1300 | 534 |
new_tv_not_free_tv]) 2); |
2525 | 535 |
by (case_tac "na: free_tv t - free_tv Sa" 1); |
536 |
(* case na ~: free_tv t - free_tv Sa *) |
|
3919 | 537 |
by (asm_full_simp_tac (!simpset addsplits [expand_if]) 2); |
2525 | 538 |
(* case na : free_tv t - free_tv Sa *) |
3919 | 539 |
by (asm_full_simp_tac (!simpset addsplits [expand_if]) 1); |
2525 | 540 |
by (dtac (free_tv_app_subst_scheme_list RS subsetD) 1); |
541 |
by (fast_tac (set_cs addDs [codD,subst_comp_scheme_list RSN (2,trans), |
|
542 |
eq_subst_scheme_list_eq_free] addss ((!simpset addsimps |
|
543 |
[free_tv_subst,dom_def]))) 1); |
|
2083
b56425a385b9
Tidied some proofs: changed needed for de Morgan laws
paulson
parents:
2058
diff
changeset
|
544 |
by (Fast_tac 1); |
2525 | 545 |
(* case Let e1 e2 *) |
546 |
by (eresolve_tac has_type_casesE 1); |
|
547 |
by (eres_inst_tac [("x","S'")] allE 1); |
|
548 |
by (eres_inst_tac [("x","A")] allE 1); |
|
549 |
by (eres_inst_tac [("x","t1")] allE 1); |
|
550 |
by (eres_inst_tac [("x","n")] allE 1); |
|
551 |
by (mp_tac 1); |
|
552 |
by (mp_tac 1); |
|
553 |
by (safe_tac HOL_cs); |
|
554 |
by (Asm_simp_tac 1); |
|
555 |
by (eres_inst_tac [("x","R")] allE 1); |
|
556 |
by (eres_inst_tac [("x","gen ($ S A) t # $ S A")] allE 1); |
|
557 |
by (eres_inst_tac [("x","t'")] allE 1); |
|
558 |
by (eres_inst_tac [("x","m")] allE 1); |
|
559 |
by (rotate_tac 4 1); |
|
560 |
by (Asm_full_simp_tac 1); |
|
561 |
by (dtac mp 1); |
|
562 |
by (rtac has_type_le_env 1); |
|
3018 | 563 |
by (assume_tac 1); |
2525 | 564 |
by (Simp_tac 1); |
565 |
by (rtac gen_bound_typ_instance 1); |
|
566 |
by (dtac mp 1); |
|
567 |
by (forward_tac [new_tv_compatible_W] 1); |
|
568 |
by (rtac sym 1); |
|
3018 | 569 |
by (assume_tac 1); |
2525 | 570 |
by (fast_tac (!claset addDs [new_tv_compatible_gen,new_tv_subst_scheme_list,new_tv_W]) 1); |
571 |
by (safe_tac HOL_cs); |
|
572 |
by (Asm_full_simp_tac 1); |
|
573 |
by (res_inst_tac [("x","Ra")] exI 1); |
|
574 |
by (simp_tac (!simpset addsimps [o_def,subst_comp_scheme_list RS sym]) 1); |
|
1525 | 575 |
qed_spec_mp "W_complete_lemma"; |
576 |
||
577 |
goal W.thy |
|
2525 | 578 |
"!!e. [] |- e :: t' ==> (? S t. (? m. W e [] n = Some(S,t,m)) & \ |
579 |
\ (? R. t' = $ R t))"; |
|
3018 | 580 |
by (cut_inst_tac [("A","[]"),("S'","id_subst"),("e","e"),("t'","t'")] |
1525 | 581 |
W_complete_lemma 1); |
3018 | 582 |
by (ALLGOALS Asm_full_simp_tac); |
1525 | 583 |
qed "W_complete"; |