Direct clang test on the box proved IddCx.h parses with 0 errors as C++ but fails
as C (wdk_default has no --language=c++) — the IDARG_* typedef names hit "must use
struct tag" in C mode. Fix generate_iddcx: --language=c++ + keep -DIDD_STUB +
allowlist_recursively(false) + full codegen, so it emits ONLY IddCx items
(structs, the IddFunctions table enums, DDI fn-ptr typedefs) and references
WDF/Win/DXGI types from wdk-sys via `use crate::types::*` (no re-emission, no
blocklist). Reverted the ENABLED_API_SUBSETS Iddcx entry (it wrongly pulled
IddCx into the C-mode constants/types passes).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler
0da7a8c73c