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refactor: WF: create unfold theorems eagerly #6898
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This PR changes how the unfold theorems for well-founded recursion are created. They are created eagerly (anticipating that the behaivor may be affected by simp sets soon), and without the detour of going through equational theorems.
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This PR changes the `simpMatch` function, used inside the equation generator for WF-rec functions, to not do eta-expansion. This makes the process a bit more robust and disciplined, and avoids removing match-statements (and introduce projections and dependencies) that we'd rather split instead.
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but thread the tryRefl flag through, as well as the declNames.
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…r/lean4 into joachim/wf-eager-unfold
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This PR changes the `simpMatch` function, used inside the equation generator for WF-rec functions, to not do eta-expansion. This makes the process a bit more robust and disciplined, and avoids removing match-statements (and introduce projections and dependencies) that we'd rather split instead. Also adds more tracing to the equational theorem generator. Extracted from #6898.
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This PR changes how the unfold theorems for well-founded recursion are created. They are created eagerly (anticipating that the behaivor may be affected by simp sets soon), and without the detour of going through equational theorems.