[boost] [signals] Compiler error

Subject: [boost] [signals] Compiler error
From: Claas H. Köhler (claas.koehler_at_[hidden])
Date: 2011-11-18 06:57:05

Hi everybody!

When compiling boost 1.48.0 using gcc-4.6 and the "--std=c+0x" option, I 
get the following error message:

libs/signals/src/named_slot_map.cpp: In member function ‘void 
boost::signals::detail::named_slot_map::disconnect(const 
boost::signals::detail::stored_group&)’:
libs/signals/src/named_slot_map.cpp:99:48: error: conversion from 
‘std::list<boost::signals::detail::connection_slot_pair>::const_iterator 
{aka 
std::_List_const_iterator<boost::signals::detail::connection_slot_pair>}’ to 
non-scalar type ‘boost::signals::detail::slot_pair_iterator {aka 
std::_List_iterator<boost::signals::detail::connection_slot_pair>}’ 
requested

The reason seems to be that std::map's erase function expects a 
std::map::iterator in the old standard (according to cplusplus.com), 
while c++11 seemingly requires a std::map::const_iterator as argument 
(see section 23.4.4.1).

Thus replacing line 105
  OLD groups.erase(group);
  NEW groups.erase( static_cast<const_group_iterator>(group) );

and line 128
OLD if (empty(g)) groups.erase(g++);
NEW if (empty(g)) groups.erase( static_cast<const_group_iterator>(g++);

solves the problem for me.

Is it intended to have all boost libraries conforming with C++11?

Regards
Claas