Re: [Boost-users] [iterator_facade] Help with const iterator for binary file

AMDG nicola wrote:

Hi, I have a class modeling a record-based read-only binary file and I have written a random access iterator based on iterator_facade to iterate over the records. The class looks like this:

class my_binary_file {

<snip>

explicit my_binary_file_iterator(my_binary_file* ff, unsigned int n) : ff_ptr_(ff), rec_num_(n) { }

my_binary_file* is *not* const here.

<snip>

};

public: typedef my_binary_file_iterator iterator;

iterator begin() *const* { return iterator(this, 0); }

this is a pointer to const. The constructor of iterator requires a pointer to non-const. In Christ, Steven Watanabe