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| author |  Emilio Jesus Gallego Arias <e+git@x80.org> | 2018-04-09 01:33:31 +0200 |
|---|---|---|
| committer | Emilio Jesus Gallego Arias <e+git@x80.org> | 2018-04-13 12:13:48 +0200 |
| commit | 2243c25c79ab19876ad74452c9cecc7dcc88c67c (patch) | |
| tree | f32573eb7d7c4dbdb4493e186bed87c80e61a747 /theories/Arith/Div2.v | |
| parent | b68e0b4f9ba37d1c2fa5921e1d934b4b38bfdfe7 (diff) | |
[ltac] Deprecate nameless fix/cofix.
LTAC's `fix` and `cofix` do require access to the proof object inside
the tactic monad when used without a name. This is a bit inconvenient
as we aim to make the handling of the proof object purely functional.
Alternatives have been discussed in #7196, and it seems that
deprecating the nameless forms may have the best cost/benefit ratio,
so opening this PR for discussion.
See also #6171.
Diffstat (limited to 'theories/Arith/Div2.v')
| -rw-r--r-- | theories/Arith/Div2.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/theories/Arith/Div2.v b/theories/Arith/Div2.v index 42956c475..a5e457831 100644 --- a/theories/Arith/Div2.v +++ b/theories/Arith/Div2.v @@ -30,7 +30,7 @@ Lemma ind_0_1_SS : P 0 -> P 1 -> (forall n, P n -> P (S (S n))) -> forall n, P n. Proof. intros P H0 H1 H2. - fix 1. + fix ind_0_1_SS 1. destruct n as [|[|n]]. - exact H0. - exact H1. @@ -105,7 +105,7 @@ Hint Resolve double_S: arith. Lemma even_odd_double n : (even n <-> n = double (div2 n)) /\ (odd n <-> n = S (double (div2 n))). Proof. - revert n. fix 1. destruct n as [|[|n]]. + revert n. fix even_odd_double 1. destruct n as [|[|n]]. - (* n = 0 *) split; split; auto with arith. inversion 1. - (* n = 1 *) |