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implicit cast on division turns negative argument into bit<> and typechecks #195

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hackedy opened this issue May 12, 2020 · 1 comment
Open

implicit cast on division turns negative argument into bit<> and typechecks #195

hackedy opened this issue May 12, 2020 · 1 comment
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hackedy commented May 12, 2020

Right now implicit casts for binary operations (following the spec) will turn something like 8w20 / (-2) into 8w20 / 8w254, which typechecks. I'm making exceptions in implicit casts for shifts right now to avoid similar problems but division is already convoluted enough.
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hackedy commented May 12, 2020

For an example: examples/checker_tests/bad/div1.p4

@hackedy hackedy assigned hackedy and unassigned hackedy Jun 17, 2020
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