57c5efe309
This PR develops custom simprocs for dealing with `ite`/`dite` expressions in `cbv` tactics, based on equivalent simprocs from `Sym.simp`, with the difference that if the condition is not reduced to `True`/`False`, we make use of the decidable instance and calculate to what the condition reduces to. Stacked on top of #12391.
31 lines
655 B
Text
31 lines
655 B
Text
set_option cbv.warning false
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example : (if (true = false) then 5 else 7) = 7 := by
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conv =>
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lhs
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cbv
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example : (if (true = ((fun x => x) true)) then 5 else 7) = 5 := by
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conv =>
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lhs
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cbv
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example : (if (String.Pos.Raw.mk 1 = String.Pos.Raw.mk 2) then 5 else 42) = 42 := by
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conv =>
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lhs
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cbv
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example : (if (String.Pos.Raw.mk 1 = String.Pos.Raw.mk 1) then 5 else 42) = 5 := by
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conv =>
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lhs
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cbv
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example : (if _ : String.Pos.Raw.mk 1 = String.Pos.Raw.mk 2 then 5 else 42) = 42 := by
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conv =>
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lhs
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cbv
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example : (if _ : String.Pos.Raw.mk 1 = String.Pos.Raw.mk 1 then 5 else 42) = 5 := by
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conv =>
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lhs
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cbv
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