Commits on Jul 29, 2022

1. Add -Wnonunit-statement and -Wnonunit-if …

   Warn about any interesting value in statement position,
   for some definition of interest.
   
   Generalizes the current warning for "pure" expressions.
   
   By default, warns about unibranch if, which lack an else
   in user code.
   
   Specify -Wnonunit-if:false to turn off warning about
   unibranch if. (That also turns off -Wvalue-discard for
   those cases.)
   
   Improve explicit Unit check
   
   Accommodate field when method is this.type
   
   Handle Match

   

   som-snytt committed Jul 29, 2022
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2. Tweak setInfo and do not warn on return of arg

   

   som-snytt committed Jul 29, 2022
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3. Mention type of unused value and mitigation

   

   som-snytt committed Jul 29, 2022
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4. Add VBAR per eagle-eyed review

   

   som-snytt committed Jul 29, 2022
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