1f04bf4fd1
This PR adds a dedicated cbv simproc for `Decidable.decide` that directly matches on `isTrue`/`isFalse` instances, producing simpler proof terms and avoiding unnecessary unfolding through `Decidable.rec`. --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
19 lines
526 B
Text
19 lines
526 B
Text
set_option cbv.warning false
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-- Success: proposition reduces to `Bool.true`
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example : 1 + 1 = 2 := by decide_cbv
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example : 1 ∈ [1, 2, 3] := by decide_cbv
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/-- error: `decide_cbv` failed: the proposition evaluates to `false` -/
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#guard_msgs (error) in
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example : 1 + 1 = 3 := by decide_cbv
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opaque myOpaqueBool : Bool
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/--
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error: `decide_cbv` failed: could not reduce the expression to a boolean value; got stuck at: ⏎
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decide (myOpaqueBool = true)
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-/
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#guard_msgs (error) in
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example : myOpaqueBool = true := by decide_cbv
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