Make coverage more similar to the one in Scala 2 #23722
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compiler/src/dotty/tools/dotc/transform/InstrumentCoverage.scala
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* remove coverage of inlined nodes (as mentioned in the accompanying comment, those are impossible to represent in most cases) * add coverage for Literals (ones directly in Apply are omitted) * remove coverage of `throw` contents * if apply node is tagged, do not tag it's prefix, outside of other prefixing Apply's arguments (eg. when we tag `a+b+c` we do not redundantly tag `a+b`) * allow instrumenting synthetic method calls (like apply of a case class) Also fixes issue with certain generated Block nodes not having assigned the correct type
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KacperFKorban
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Aug 15, 2025
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Closes #21877
throwcontentsa+b+cwe do not redundantly taga+b)After all of these changes the statements tagged are much more similar to Scala 2, let's look at the #21877 minimisation:
There are some differences still remaining, most notably the tagging the DefDefs and its default parameters, but I left them for now, as those seem more useful than harmful.
BEcouse of those changed most of the .covergae files had to be regenerated, however I want through each and every diff to make sure that all of those changes there are expected.
Additionally, this PR also fixes #21695 (issue with certain generated Block nodes not having assigned the correct type, causing later undefined errors).