rtti unavailable

RTTI unavailable (rtti-unavailable)

Declarations that lose classic (TypInfo / TWriter streaming) or extended (TRttiContext) RTTI. Written for generated persistence classes -- ORM3's COMMON\OBJECTS units -- that must stay readable by a stream and by a future RTTI-based ORM. OFF by default.

Running it

drag-lint lint-all --db <project.sqlite> --rule rtti-unavailable
drag-lint lint <unit.pas> --db <project.sqlite> --rule rtti-unavailable

Opt in per project with "enabled": ["rtti-unavailable"] in drag-lint-lint.json or --enable rtti-unavailable. Pass the platform library index (--db <library.sqlite> on lint-all, --library-db on lint) so ancestors and record types declared in the RTL / VCL are known.

What it reports

One finding per declaration or directive. The message starts with the sub-kind:

sub-kind	fires on	severity
enum-no-typeinfo	an enum whose explicit ordinals are not 0, 1, 2, ... in order (TGap = (gA = 1, gB = 3)): the compiler emits no PTypeInfo, TypeInfo(TGap) fails with E2134; and every published property of such a type	warning
published-record-property	a published property of a record type (TSQLTimeStamp, TBcd, a project record): TWriter.WriteComponent skips it silently	warning; info when the class's DefineProperties names the property (streamed by hand)
rtti-narrowing-directive	{$RTTI EXPLICIT ...} whose METHODS / PROPERTIES / FIELDS set lacks vcPublic or vcPublished; {$M-} / {$TYPEINFO OFF} in effect over a published class without an RTTI-bearing ancestor; {$WEAKLINKRTTI ON} in a unit declaring TComponent descendants	warning
published-without-persistent	a class with a published section, no TPersistent ancestor and not declared under {$M+}	warning

What it does not report

• An explicit ordinal that is not an integer literal (cA = Ord('A')) -- not judged.
• An ancestor that neither the project nor the library index (nor the short built-in RTL / VCL list) knows -- unknown, silent.
• A {$RTTI EXPLICIT} set named through a constant other than the RTL Default*RttiVisibility ones -- not judged.
• Anonymous property types (sub-check 5 of the request): a Delphi property declaration requires a type identifier, so there is nothing to find.

Fixing it

• Enums: never renumber a persisted enum. Add RTTI-safe filler values so the ordinals become contiguous from 0, or use a contiguous enum plus a code map.
• Record properties: stream them in an overridden DefineProperties (Filer.DefineProperty / DefineBinaryProperty); the finding then drops to info.
• Directives: keep vcPublic and vcPublished in every {$RTTI EXPLICIT} set; remove {$WEAKLINKRTTI ON} from units that declare persistent classes.
• Classes: derive from TPersistent (or TInterfacedPersistent), or declare the class under {$M+}.

Fixture and guard

tests\lint-project\rtti-unavailable\ (the request's snippet plus a clean component unit and a stand-in library) and run_rtti_unavailable.ps1.