A C++ class annotated with an export/visibility macro between `class`/`struct`
and the type name — `class MYMODULE_API UMyComponent : public UActorComponent`
(the standard Unreal-Engine `*_API` pattern), or the equivalent `*_EXPORT`/
`*_ABI` macros in Qt, Boost, LLVM, etc. — makes tree-sitter read `class MACRO`
as an elaborated type and the whole declaration as a function. #946 dropped the
resulting phantom function, but that also discarded the recoverable class name,
members, and base-class edge, so the class never entered the graph and
"find subclasses" / type-hierarchy / impact-through-inheritance returned
nothing for effectively every gameplay class in a UE project.
Add `blankCppExportMacros` as `cppExtractor.preParse`: it blanks the macro with
equal-length spaces before parsing (offset-preserving, like C#'s
`blankCsharpPreprocessorDirectives`/#237), so the declaration parses as a normal
class_specifier and existing extraction emits the node, members, and `extends`
edge. Generalized past UE `*_API` to any all-caps export macro, with two
false-positive guards: the trailing `[:{]` definition-guard (leaves elaborated
var decls like `struct FOO var;` alone) and requiring the macro to be followed
by the real name (leaves an all-caps class NAME such as `class FOO : public Base`
alone). C++-only, so C's heavier `struct TAG var;` never reaches it. The #946
drop stays as the fallback for any residual misparse the blanking doesn't catch.
Validated on google/leveldb (LEVELDB_EXPORT, 134 files): class/struct nodes
266→293, extends edges 292→359, phantom functions 588→513; every export-macro
real definition flips function→class and `EnvWrapper extends Env` goes
absent→present.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Colby Mchenry
e596c968ab