Implement boxing for singleton type arguments #23418
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A type `A[b.type]` with a singleton type argument is converted to
`A[box b.type^{b}]` so that the box status is recorded. Since box status
only comes with CapturingTypes we have to convert the singleton type
to a capturing type.
Fixes scala#23207
bracevac
approved these changes
Jun 25, 2025
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A type
A[b.type]with a singleton type argument is converted toA[box b.type^{b}]so that the box status is recorded. Since box status only comes with CapturingTypes we have to convert the singleton type to a capturing type.Fixes #23207