Get filename/path of clang::Decl

get_flename_of_decl.cxx

static const clang::FileEntry * getFileEntryForDecl(const clang::Decl * decl, clang::SourceManager * sourceManager)
{
    if (!decl || !sourceManager) {
        return 0;
    }
    clang::SourceLocation sLoc = decl->getLocation();
    clang::FileID fileID = sourceManager->getFileID(sLoc);
    return sourceManager->getFileEntryForID(fileID);
}
 
static const char * getFileNameForDecl(const clang::Decl * decl, clang::SourceManager * sourceManager)
{
    const clang::FileEntry * fileEntry = getFileEntryForDecl(decl, sourceManager);
    if (!fileEntry) {
        return 0;
    }
    return fileEntry->getName();
}