author blanchet Thu May 12 15:29:19 2011 +0200 (2011-05-12) changeset 42760 d83802e7348e parent 42759 fdd15e889ad7 child 42761 8ea9c6fa8b53
another concession to backward compatibility
 src/HOL/Metis_Examples/HO_Reas.thy file | annotate | diff | revisions src/HOL/Tools/Meson/meson.ML file | annotate | diff | revisions
```     1.1 --- a/src/HOL/Metis_Examples/HO_Reas.thy	Thu May 12 15:29:19 2011 +0200
1.2 +++ b/src/HOL/Metis_Examples/HO_Reas.thy	Thu May 12 15:29:19 2011 +0200
1.3 @@ -28,10 +28,6 @@
1.4  sledgehammer [expect = some] (inc_def)
1.5  by (metis inc_def)
1.6
1.7 -lemma "(\<lambda>y. y + 1) = inc"
1.8 -sledgehammer [expect = some] (inc_def)
1.9 -by (metis inc_def)
1.10 -
1.11  definition add_swap :: "nat \<Rightarrow> nat \<Rightarrow> nat" where
1.12  "add_swap = (\<lambda>x y. y + x)"
1.13
```
```     2.1 --- a/src/HOL/Tools/Meson/meson.ML	Thu May 12 15:29:19 2011 +0200
2.2 +++ b/src/HOL/Tools/Meson/meson.ML	Thu May 12 15:29:19 2011 +0200
2.3 @@ -616,18 +616,14 @@
2.4      skolemize_with_choice_theorems ctxt (choice_theorems thy)
2.5    end
2.6
2.7 -fun is_Abs (Abs _) = true
2.8 -  | is_Abs _ = false
2.9 -
2.10 -(* Removes the lambdas from an equation of the form "t = (%x. u)".  *)
2.11 +(* Removes the lambdas from an equation of the form "t = (%x1 ... xn. u)". It
2.12 +   would be desirable to do this symmetrically but there's at least one existing
2.13 +   proof in "Tarski" that relies on the current behavior. *)
2.14  fun extensionalize_conv ctxt ct =
2.15    case term_of ct of
2.16 -    Const (@{const_name HOL.eq}, _) \$ t1 \$ t2 =>
2.17 -    ct |> (if is_Abs t1 orelse is_Abs t2 then
2.18 -             Conv.rewr_conv @{thm fun_eq_iff [THEN eq_reflection]}
2.19 -             then_conv extensionalize_conv ctxt
2.20 -           else
2.21 -             Conv.comb_conv (extensionalize_conv ctxt))
2.22 +    Const (@{const_name HOL.eq}, _) \$ _ \$ Abs _ =>
2.23 +    ct |> (Conv.rewr_conv @{thm fun_eq_iff [THEN eq_reflection]}
2.24 +           then_conv extensionalize_conv ctxt)
2.25    | _ \$ _ => Conv.comb_conv (extensionalize_conv ctxt) ct
2.26    | Abs _ => Conv.abs_conv (extensionalize_conv o snd) ctxt ct
2.27    | _ => Conv.all_conv ct
```