[boost] [iostreams] input_sequence() questions

Subject: [boost] [iostreams] input_sequence() questions
From: Rob Riggs (rob_at_[hidden])
Date: 2009-12-04 00:01:04

I am attempting to adapt a windowed mmap reader, one which manages its 
mapping window using iterators, to a boost::iostreams direct source.  I 
wrote this for reading large files via mmap on 32-bit platforms.

The documentation shows that input_sequence() returns a pair of char 
pointers, not iterators.  Is that really true or am I misreading the docs?

http://www.boost.org/doc/libs/1_41_0/libs/iostreams/doc/concepts/source.html

And it also shows that the input_sequence pointers are non-const.  Why 
is that required for sources?

Thanks,

Rob