Require let rec pattern variables to have layout value. #2943
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liam923
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Aug 19, 2024
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Per discussion on the unboxed tuples PR, this requires all pattern variables bound by a
let recto have layout value.This isn't really a change: the existence of
Lambda.layout_letrecshows we thought things bound by a let-rec had layout value. But we have been relying onValue_rec_checkto enforce it, and that will no longer be sufficient in the presence of unboxed tuples (there is a test case in that PR showing this - I will rebase it once this is merged).@liam923 perhaps you could review? It's mostly changes to error messages. This is lower priority than the 5.2 merge or current compiler release.