51     struct file  struct
59         fs::path const path;
60         std::string source_;
61         bool is_code_snippets;
64         unsigned qbk_version;
65         unsigned ref_count;
68         quickbook::string_view source() const { return source_; }  in source()
70         file(  in file()  function
82         explicit file(file const& f, quickbook::string_view s)  in file()  function
91         virtual ~file() { assert(!ref_count); }  in ~file()
93         unsigned version() const  in version()
99         void version(unsigned v)  in version()