John Maddock — Thu, 14 Feb 2002 11:54:48 GMT

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The standard requires all ForwardIterators and above to
have a default constructor (see C++ standard, Table 74),
sorry.
WRT your particular problem - have a look at the mapfile
class in boost/regex/detail/fileiter.cpp - this will either
use a memory mapped file (on win32), or else use smart
iterators to load sections of a file into memory as
required - it may be close enough to what you need, or at
least give you some ideas.
regards,
John Maddock.

lfarkas — Fri, 15 Feb 2002 11:26:53 GMT

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thanks for the tipp again, but another bugreport in:
boost/regex/detail/fileiter.cpp
(which would be usefult to make public anyway)
in mapfile (for win32) the following member should have to
be const:
-----------------------------------
   const char* begin(){ return _first; }
   const char* end(){ return _last; }
   size_t size(){ return _last - _first; }
   bool valid(){ return (hfile != 0) && (hfile !=
INVALID_HANDLE_VALUE); }
-----------------------------------
the correct form:
-----------------------------------
   const char* begin() const { return _first; }
   const char* end() const { return _last; }
   size_t size() const { return _last - _first; }
   bool valid() const { return (hfile != 0) && (hfile !=
INVALID_HANDLE_VALUE); }
-----------------------------------
and if I send it to you another cosmetic fix. I always
prefere member initilaization over assigment:
-----------------------------------
   mapfile(){ hfile = hmap = 0; _first = _last = 0; }
   mapfile(const char* file){ hfile = hmap = 0; _first =
_last = 0; open(file); }
-----------------------------------
my prefered version:
-----------------------------------
   mapfile() : hfile(0), hmap(0), _first(0), _last(0) {}
   mapfile(const char* file) : hfile(0), hmap(0), _first(0),
_last(0) { open(file); }
-----------------------------------
and for the unix version:
-----------------------------------
   mapfile(){ hfile = 0; _size = 0; _first = _last = 0; }
   mapfile(const char* file){ hfile = 0; _size = 0; _first =
_last = 0; open(file); }
-----------------------------------
the new ones;
-----------------------------------
   mapfile() : hfile(0), _size(0), _first(0), _last(0) {}
   mapfile(const char* file) : hfile(0), _size(0),
_first(0), _last(0) { open(file); }
-----------------------------------
yours.

status changed

John Maddock — Fri, 30 May 2003 11:06:23 GMT

status assigned → closed

Boost C++ Libraries: Ticket #61: regex iterator requirement

status changed