mercury/bug548.exp at cdf10e673cf66188e3facae0f458aea71f9ee438 - mercury - Steepath Git Private Instance

mercurylang/mercury

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Zoltan Somogyi 9012395ec2 Don't let ml_tag_switch.m generate duplicate fields.

This fixes the second problem identified by Mantis bug #548.

compiler/ml_tag_switch.m:
    Detect the circumstances in which this problem would arise.
    In such cases, simply fail, and let ml_switch_gen.m fall back
    to implementing the switch as an if-then-else chain.

compiler/ml_switch_gen.m:
    Implement that fallback.

compiler/switch_util.m:
    The new code in ml_tag_switch.m needs to thread a fourth piece of state
    through the predicate it passes to group_cases_by_ptag, so change
    its argument list to accommodate such predicates. And since some other
    modules pass the same predicates to group_cases_by_ptag and
    string_binary_cases, make the same change in the argument list
    of that predicate as well.

    Delete one stray comment, and note that another comment seems misplaced.

compiler/ml_string_switch.m:
compiler/string_switch.m:
compiler/switch_case.m:
compiler/tag_switch.m:
    Conform to the changes in switch_util.m.

tests/hard_coded/bug548.exp:
tests/hard_coded/Mmakefile:
    Enable the previously-added test case for Mantis #548, after
    add an .exp file for it.

2022-02-11 21:32:53 +11:00

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