[Boost-users] transform_iterator::reference

Subject: [Boost-users] transform_iterator::reference
From: Matwey V. Kornilov (matwey.kornilov_at_[hidden])
Date: 2011-01-06 10:48:46

Hi,

Boost 1.42.0 documentation of transfrom_iterator says: "If Reference is 
use_default then the reference member of transform_iterator is 
result_of<UnaryFunction(iterator_traits<Iterator>::reference)>::type. 
Otherwise, reference is Reference." But it is simply implemented as 
UnaryFunction::result_type;

This discrepancy between documentation and implementation plays a role when 
I want to use transform_iterator with boost::mem_fn to access member 
variable of structure.

mem_fn's operator() is overridden to provide both const and non-const access 
to member variable. The discrepancy leads to compilation error for non-const 
access.