Function preParseCppSource

src/extraction/languages/c-cpp.ts:797–817

C/C++ source pre-processing before tree-sitter: recover macro-annotated class * definitions, macro-prefixed function definitions, macro-prefixed members, and * macro-decorated members (Unreal-Engine reflection markup) — plus the non-C++ * surface of the dialects parsed with the C++ grammar: `.met

(source: string, filePath?: string)

 * or by content, for CUDA living in `.h`/`.hpp` headers). Offset-preserving;
 * directive lines are restored at the end (see restoreDirectiveLines). */
function preParseCppSource(source: string, filePath?: string): string {
  // blankCLeadingAttrMacros runs AFTER the api-prefix blank so a stacked
  // `FMT_NORETURN FMT_API void f(…)` reduces to the `MACRO Ret name(` shape
  // it matches (the _API token is already spaces by then).
  let blanked = blankLoneMacroLines(
    blankCLeadingAttrMacros(
      blankCppAnnotationMacroCalls(
        blankCppInlineAnnotationMacros(
          blankCppApiPrefixMacros(blankCppInlineMacros(blankCppExportMacros(source)))
        )
      )
    )
  );
  const lower = filePath ? filePath.toLowerCase() : '';
  if (lower.endsWith('.metal')) {
    blanked = blankMetalAttributes(blanked);
  } else if (lower.endsWith('.cu') || lower.endsWith('.cuh') || looksLikeCudaSource(source)) {
    blanked = blankCudaConstructs(blanked);
  }
  return restoreDirectiveLines(source, blanked);
}

/**
 * Blank an unknown attribute macro sitting in front of a C function