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Validation for multiple assignments takes rewrite actions into account now #1766

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merged 7 commits into from
Dec 11, 2024
Merged

Validation for multiple assignments takes rewrite actions into account now #1766

merged 7 commits into from
Dec 11, 2024

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JohannesMeierSE
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Fixes #1756.

This PR contributes the following improvements for the validation for multiple assignments with = instead of += (see #1412):

  • unassigned actions don't create new objects, only rewrite actions create new objects
  • respect looped rewrite actions, even when they are deeply nested or occur as top-level elements of rules
  • handle asymmetric use of rewrite actions in alternatives

Beyond that, this PR ...

  • simplified the validation logic
  • improved error logging in test utils

@JohannesMeierSE JohannesMeierSE mentioned this pull request Dec 3, 2024
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@cdietrich cdietrich requested a review from msujew December 4, 2024 05:17
@cdietrich
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checked with my usecase in the arithmetics grammar + in the extension host and it seems to work

sailingKieler
sailingKieler approved these changes Dec 6, 2024
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@sailingKieler sailingKieler left a comment

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LVGTM! Just a few remarks and questions, nothing to be changed urgently. 🚀

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@sailingKieler
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And explicit kudos for your elaborate test cases!

@JohannesMeierSE
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Thanks for your review @sailingKieler! In my eyes, this PR is ready to merge.

@JohannesMeierSE JohannesMeierSE merged commit e004619 into main Dec 11, 2024
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@spoenemann spoenemann deleted the jm/1756-validation-fix-multiple-rewrites branch December 18, 2024 07:33
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@sailingKieler sailingKieler sailingKieler approved these changes

@cdietrich cdietrich Awaiting requested review from cdietrich

@msujew msujew Awaiting requested review from msujew

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Successfully merging this pull request may close these issues.

False positive in grammar multiple assignments validation
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@JohannesMeierSE @cdietrich @sailingKieler