2012/3/15 Ion Gaztañaga <igaztanaga@gmail.com>:
El 15/03/2012 23:18, Olaf van der Spek escribió:
2012/3/15 Ion Gaztañaga<igaztanaga@gmail.com>:
El 15/03/2012 3:14, Joel Young escribió:
Can the interprocess::basic_string be modified to allow these conversions?
I hate having to do:
key_val = "fruitcake"; db.find(key_val);
interprocess::basic_string is now boost::container::basic_string, which follows std::basic_string interface. And you always need an allocator to place the string in shared memory. I don' think it could be implicitly constructible from char* or std::string.
But there's no (good) reason for the input to be required to be in shared memory.
A shared memory allocator is designed to allocate from a managed shared memory segment. And this requires a base address of that shared memory segment . And even with std::string you need to build a temporary string to compare it with the ones stored in the container.
Do you have any proposal or alternative idea?
Yes, do a direct compare between your key type and const char* -- Olaf