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Dario Gabriel Lipicar
818a3c6490
The generated Qt client wrapper packed a method's arguments with
`QVariantList{a, b, ...}` (sync) and `QVariantList{...}` / `QVariantList() << a`
(async). For a QVariantList-typed argument -- every `[T]` list type (`[any]`,
`[int]`, `[uint]`, `[float64]`, `[bool]`) -- a braced `QVariantList{v}` and
`<< v` both CONCATENATE the list's elements into the args list, so
`echoList([1,2,3])` went out as three positional args instead of one array arg.
The receiver saw an arg-count mismatch and the list round-tripped empty; through
a UI->proxy->provider 2-hop it hung the call outright. This is the long-standing
"typed arrays empty over the Qt path" bug.
Fix both generators that emit the Qt client:
- legacy `generator_lib.cpp` (the production `logos-cpp-generator`): wrap each
arg in `QVariant::fromValue(...)` in the sync and async call sites.
- experimental `lidl_gen_client.cpp`: route both paths through the existing
`packVariantList` helper (which already wraps with `QVariant::fromValue`), the
same helper the event `trigger` path uses.
`QVariant::fromValue` does not double-wrap an already-QVariant (`any`) arg, and
scalars/QString/QVariantMap/QByteArray were never affected (they don't
concatenate). Empirically: `QVariantList{v}` / `<< v` give size 3 for a 3-element
list; the wrapped forms give size 1.
Tests: legacy generator_tests gain ListArgWrappedAsOneElement and update the
param-packing assertions to the wrapped form; experimental gains
ListArgIsPackedAsOneElement. 167/167 green.