Changeset 1535 for src/common
- Timestamp:
- Nov 23, 2011, 12:07:01 PM (9 years ago)
- File:
-
- 1 edited
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src/common/Identifiers.ma
r1516 r1535 173 173 λtag,A,m,id. match lookup ?? m id return λx. x ≠ None ? → ? with [ Some a ⇒ λ_. a | None ⇒ λH.⊥ ]. 174 174 cases H #H' cases (H' (refl ??)) qed. 175 176 lemma lookup_lookup_present : ∀tag,A,m,id,p. 177 lookup tag A m id = Some ? (lookup_present tag A m id p). 178 #tag #A #m #id #p 179 whd in p ⊢ (???(??%)); 180 cases (lookup tag A m id) in p ⊢ %; 181 [ * #H @⊥ @H @refl 182 | #a #H @refl 183 ] qed. 175 184 176 185 definition update_present : ∀tag,A. ∀m:identifier_map tag A. ∀id. present ?? m id → A → identifier_map tag A ≝
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