20.04.2011 18:54, Olaf van der Spek пишет:
Hi,
I've written a small wrapper for std::map::find() (and map-like containers/ranges) that returns a pointer to the value if found (or NULL if not found).
See https://svn.boost.org/trac/boost/ticket/5227
The advantage is that you don't need the container type name (for ::reference), you can initialize the pointer inside an if condition, you don't have to compare against ::end() and you don't have to use ->second. Hmm... Why not use map::at()?
Compare: if (very_long_type_name_t::mapped_type* i = find_ptr(very_long_name, 1)) cout << *i << "\n"; with: try { cout << very_long_name.at( 1 ) << endl; } catch ( const std::exception& /* exc */ ) { cout << "No value with key 1" << endl; } You don't like exceptions? - Denis