id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5254	hash template specializations require BOOST_HAS_TR1_HASH work-around	Jim Bell <jim@…>	John Maddock	"The TR1 docs show the templated hash struct being in namespace std::tr1.

But putting a hash template specialization in std::tr1 doesn't work, at least in cases where BOOST_HAS_TR1_HASH isn't defined.

This is broken for both MinGW-gcc-4.4 and MSVC-8 (VS2005).

See the attached files:
* TR1_hash_break.cpp doesn't compile for either platform.
* TR1_hash_workaround.cpp compiles for both.


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MSVC-8:
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.762 for 80x86

Copyright (C) Microsoft Corporation.  All rights reserved.

TR1_hash_break.cpp
TR1_hash_break.cpp(21) : error C2888: 'boost::hash<my_key>' : symbol cannot be defined within namespace 'tr1'


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MinGW gcc-4.4:
TR1_hash_break.cpp:17: error: specialization of 'template<class T> struct boost::hash' in different namespace
F:\boost\MinGW-32\trunk\boost/boost/tr1/functional.hpp:127: error:   from definition of 'template<class T> struct boost::hash'
TR1_hash_break.cpp:19: error: definition of 'size_t boost::hash<my_key>::operator()(const my_key&) const' is not in namespace enclosing 'boost::hash<my_key>'"	Bugs	closed	Boost 1.47.0	TR1	Boost Development Trunk	Problem	fixed	TR1 hash mingw-gcc-4.4 msvc-8	jim@…