elijahr f4fd26d403 Fix sizeof(T) in typedesc templates called from generic type when clauses (#25374) ...

The `hasValuelessStatics` function in `semtypinst.nim` only checked for
`tyStatic`, missing `tyTypeDesc(tyGenericParam)`. This caused
`sizeof(T)` inside a typedesc template called from a generic type's
`when` clause to error with "'sizeof' requires '.importc' types to be
'.completeStruct'".

The fix adds a check for `tyTypeDesc` wrapping `tyGenericParam`,
recognizing it as an unresolved generic parameter that needs resolution
before evaluation.

Also documents the `completeStruct` pragma in the manual.

(cherry picked from commit b819472e74)

2026-01-09 08:48:29 +01:00

..

tgeneric_typedesc_sizeof.nim

Fix sizeof(T) in typedesc templates called from generic type when clauses (#25374)

2026-01-09 08:48:29 +01:00