UnnecessaryInnerClass: fix false positives labeled expression to outer class #4865
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…r class Fix an issue where inner classes which reference their outer class via a labeled expression would still be reported as unnecessary. This seems to be due to a missing visitExpressionWithLabel() check which resolves the label name: if the label is referencing a parent class, then the nested class must be `inner`. I wasn't able to find a way to resolve the labeled expression as a ClassId to match the existing class check from KtReferenceExpression, so I settled for using the class name instead, which is easy to obtain. This means there's a fair bit of duplication in overriden checkForOuterUsage() methods to check parent classes which could probably be removed, but I didn't see a particularly clean way to do so.
Codecov Report
@@ Coverage Diff @@
## main #4865 +/- ##
=========================================
Coverage 84.79% 84.80%
- Complexity 3447 3452 +5
=========================================
Files 492 492
Lines 11315 11326 +11
Branches 2083 2086 +3
=========================================
+ Hits 9595 9605 +10
Misses 673 673
- Partials 1047 1048 +1
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schalkms
reviewed
May 27, 2022
...rules-style/src/main/kotlin/io/gitlab/arturbosch/detekt/rules/style/UnnecessaryInnerClass.kt
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… labeled expressions
schalkms
approved these changes
May 29, 2022
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Fix an issue where inner classes which reference their outer class via a labeled
expression would still be reported as unnecessary. This seems to be due to a
missing visitExpressionWithLabel() check which resolves the label name: if the
label is referencing a parent class, then the nested class must be
inner.I wasn't able to find a way to resolve the labeled expression as a ClassId to
match the existing class check from KtReferenceExpression, so I settled for
using the class name instead, which is easy to obtain. This means there's a fair
bit of duplication in overriden checkForOuterUsage() methods to check parent
classes which could probably be removed, but I didn't see a particularly clean
way to do so.