Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
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This extends the specialization behavior of functions taking instance implicits to ordinary implicit arguments that are of instance type. The choice between the two is often made for subtle inference-related reasons. It also affects visibility of these functions, because the module system makes template-like decls visible to the compiler in other modules. |
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