shortenFullyQualifiedTypes: skip FQNs whose simple name clashes with types declared in the same file - #3031
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nedtwigg merged 1 commit intoAug 27, 2026
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… the same file Skip shortening when the simple name of a fully-qualified type matches a class, interface, enum, or record declared in the same compilation unit. Fixes compilation errors in projects like jbang where e.g. dev.jbang.cli.Alias intentionally uses dev.jbang.catalog.Alias as a FQN to avoid clashing with the enclosing class name.
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slachiewicz
approved these changes
Aug 25, 2026
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Turns out my original PR missed a case that affects my own projects — ironic! 😅
In jbang, several packages have classes with the same simple name (e.g.
dev.jbang.cli.Aliasanddev.jbang.catalog.Alias). The code intentionally uses FQNs to disambiguate, butshortenFullyQualifiedTypes()was happily replacing them with the short name and adding an import that fails with "Alias is already defined in this compilation unit". Sorry about that!Fix: Before deciding which FQNs are safe to shorten, collect all type names declared in the file (classes, interfaces, enums, records — including nested ones). Skip any FQN whose simple name appears in that set.
Tests added:
fqnCollisionWithEnclosingClassName— the jbang scenariofqnCollisionWithInnerClassName— simple name matches a nested classfqnNoCollisionWithDifferentSimpleName— confirms non-conflicting FQNs still shorten