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fix: isDefEq
, whnf
, simp
caching and configuration
#6053
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`withConfig` was resetting the value of other configuration options. Example: `trackZetaDelta`
Ensure that the `whnf` configuration used by the caller does not prevent type inference for an expression.
`Expr.equal` takes binder names into account.
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A few things that break under leanprover/lean4#6053 admit nicer proofs anyway, so backport these more robust proofs.
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A few things that break under leanprover/lean4#6053 admit nicer proofs anyway, so backport these more robust proofs.
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This PR fixes the caching infrastructure for
whnf
andisDefEq
, ensuring the cache accounts for all relevant configuration flags. It also cleans up theWHNF.lean
module and improves the configuration ofwhnf
.