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Make hoare_seq_ext and hoare_vcg_seqE wp rules #748
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lib/monads/nondet: make hoare_seq_ext and hoare_vcg_seqE wp rules
corlewis fe1bbae
lib/monads/trace: update wp attributes to match nondet
corlewis 3ce8811
ainvs: remove hoare_seq_ext[wp] declaration
corlewis bf45b3d
proof: update for changes to wp attributes
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could you say something about what
weak_if_wp
is or when to use it? (not in the commits, but I've either not heard of it or completely forgot)There was a problem hiding this comment.
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In my mind it's for when there's an
if
in the postcondition where you don't need to know theif
condition and don't want to lift it across the function for whatever reason.From memory, my cases in this PR were generally
if
conditions on the return value that would have been painful to lift, and where the two branches were either roughly the same or one was a form ofTrue
. As an alternative I probably could have used the simplifier to handle theif
, but this approach withweak_if_wp
was the one I found first.There was a problem hiding this comment.
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That's awesome, I hope I won't forget it. It feels better than exciting combination of
if_apply_def2
andhoare_drop_imps
, and should work in more cases. It's interesting that this isn't achieved with awp <some_rule>
, but I guess it does need to shuffle the order.