Boost C++ Libraries: Ticket #4962: Return type deduction issue in boost::lambda

pavel.pervov@… — Wed, 08 Dec 2010 08:20:32 GMT

The workaround for this may be explicit specialisation of boost::lambda::bind with the desired return type:

              outs << boost::lambda::bind<int>(&MyMap::value_type::second, boost::lambda::_1) << "\n");

Marshall Clow — Thu, 09 Dec 2010 04:47:22 GMT

Compiling with TOT clang, I get (after trimming a long traceback):

In file included from junk.cpp:6:
In file included from /Marshall/Sources/boost/release/boost/lambda/lambda.hpp:14:
In file included from /Marshall/Sources/boost/release/boost/lambda/core.hpp:48:
/Marshall/Sources/boost/release/boost/lambda/detail/function_adaptors.hpp:264:12:
      error: binding of reference to type 'int' to a value of type 'int const' drops qualifiers
    return o.*data;
           ^~~~~~~

and the workaround suggested by Pavel doesn't seem to help with clang++, btw.

owner, status changed

Steven Watanabe — Thu, 09 Dec 2010 17:12:05 GMT

owner changed from No-Maintainer to Steven Watanabe
status new → assigned

I'm fairly certain that this was caused by result_of support.

status changed; resolution set

Steven Watanabe — Mon, 03 Jan 2011 22:31:27 GMT

status assigned → closed
resolution → fixed

(In [67640]) Fix return type deduction for pointers to data members. Fixes #4962. Fixes #4566.