Re: [Boost-Users] tuple and enums

From: Jaakko Jarvi (jajarvi_at_[hidden])
Date: 2002-08-29 10:15:37

Hi Tom, 

Your code compiles fine with gcc 3.x and icc 6 (linux), so it may just
be gcc 2.96 problem.

Cheers, Jaakko

On Wed, 28 Aug 2002, Tom Matelich wrote:

> It appears that an enum cannot be default constructed in the way that
> tuple
> does,
> cons() : head(), tail() {}
> 
> Any idea on how to get around this (besides using an int in the tuple)?
> 
> Thanks,
> Tom
> 
> 
> <sample_code>
> 
> #include <boost/tuple/tuple.hpp>
> #include <string>
> 
> enum Foo { Willis, Arnold };
> 
> void test()
> {
>       boost::tuple<Foo, std::string> a;
> }
> 
> </sample_code>
> 
> </error compiler="gcc version 2.96 20000731 (Mandrake Linux 8.2)">
> 
> /usr/local/eddynet/opt/include/boost/tuple/detail/tuple_basic.hpp: In
> method
> `boost::tuples::cons<HT,
> TT>::cons () [with HT = Foo, TT = boost::tuples::cons<string,
> boost::tuples::null_type>]':
> /usr/local/eddynet/opt/include/boost/tuple/detail/tuple_basic.hpp:454:
> instantiated from `boost::tuples::tuple<T0, T1, T2, T3, T4, T5, T6, T7,
> T8,
> T9>::tuple () [with T0 = Foo, T1 = string, T2 =
> boost::tuples::null_type, T3
> = boost::tuples::null_type, T4 = boost::tuples::null_type, T5 =
> boost::tuples::null_type, T6 = boost::tuples::null_type, T7 =
> boost::tuples::null_type, T8 = boost::tuples::null_type, T9 =
> boost::tuples::null_type]'
> tuple_enum_test.cpp:8:   instantiated from here
> /usr/local/eddynet/opt/include/boost/tuple/detail/tuple_basic.hpp:263:
> cannot convert `int' to `Foo' in
> assignment
> 
> </error>
> 
> 
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-- 
--
-- Jaakko Järvi                       email: jajarvi_at_[hidden]
-- Post Doctoral Fellow               phone: [phone]
-- Pervasive Technology Labs          fax:   [phone]
-- Indiana University, Bloomington