Function preParseCSource

src/extraction/languages/c-cpp.ts:1508–1535

C source pre-processing: neutralize `#ifdef __cplusplus` compat-guard * bodies (invisible to a C compiler; `extern "C" {` otherwise errors every * public header), blank declaration-markup macro calls and lone macro lines * (`REDIS_NO_SANITIZE("bounds")` before a definition, jemalloc's diagnostic

(source: string)

 * kernel prototypes in plain `.h`) — the same content-gated CUDA blank as
 * C++. Offset-preserving. */
function preParseCSource(source: string): string {
  const inner = blankCKernelAnnotations(blankCCplusplusGuardBodies(source));
  let blanked = blankCLeadingAttrMacros(
    blankLoneMacroLines(
      blankCStatementMacroCalls(
        blankCTrailingParamAttrMacros(
          blankCppAnnotationMacroCalls(
            rewriteCPrefixedDeclMacroInitializers(
              blankCFileScopePrefixedDeclMacros(
                blankCVaArgQualifiedTypeArgs(
                  blankCTypeKeywordArgs(
                    blankCParameterizedAnnotationMacros(
                      blankCAutoInference(blankCSandwichedAnnotations(inner))
                    )
                  )
                )
              )
            )
          )
        )
      )
    )
  );
  if (looksLikeCudaSource(blanked)) blanked = blankCudaConstructs(blanked);
  // The named-variadic `#define` pass runs AFTER the directive restore — it
  // deliberately edits directive lines (see its doc comment).
  return blankCNamedVariadicDefineDots(restoreDirectiveLines(source, blanked));
}

export const cppExtractor: LanguageExtractor = {
  // Recover macro-annotated class/struct definitions (`class MYMODULE_API Foo : Base`,