Re: [boost] [xpressive] Compiler error on VC7.1

Subject: Re: [boost] [xpressive] Compiler error on VC7.1
From: Robert Dailey (rcdailey.lists_at_[hidden])
Date: 2012-05-14 13:05:45

The problem appears to be with as_xpr(). If I don't use it, it compiles
fine.

On Mon, May 14, 2012 at 11:38 AM, Robert Dailey <rcdailey.lists_at_[hidden]>wrote:

> _serverName is a std::string.
>
> I wish I could better understand the compiler error, I just don't know for
> sure if it's a problem with my own code or an incompatibility with boost &
> MSVC7.1
>
>
> On Fri, May 11, 2012 at 1:51 PM, Eric Niebler <eric_at_[hidden]> wrote:
>
>> I just tried the below code on VC++ 2003 (7.1) and was unable to
>> reproduce your error. (I assume _serverName is of type sregex?) I'm
>> afraid I don't know what to tell you. Perhaps if you could give me a
>> complete repro scenario, I might be able to help.
>>
>>
>> On 5/11/2012 9:56 AM, Robert Dailey wrote:
>> > Anyone have an idea on this issue? It's currently blocking me from
>> checking
>> > in this code to source control, since the code absolutely must work on
>> MSVC
>> > 7.1 :-(
>> >
>> > On Thu, May 10, 2012 at 4:45 PM, Robert Dailey <
>> rcdailey.lists_at_[hidden]>wrote:
>> >
>> >> Hi,
>> >>
>> >> I'm using Boost 1.49 Xpressive on VC7.1. When I compile the following
>> >> code, I get compiler errors (these do not appear on VC9):
>> >>
>> >> sregex const& rex = bos >> _serverName >> !as_xpr("_GWDomino") >>
>> >> ".diagnostics" >> *(as_xpr(".base")|".renamed");
>> >>
>> >> 'rex' is really a function parameter in my real world use case. I'm
>> >> passing the entire static regex into a function that takes a 'sregex
>> >> const&'. I get the compiler error below. Anyone know why this is
>> happening?
>> >>
>> >>
>> >>
>> C:\Code\work\cmake-decomp\build-vc7\third_party\boost\1.49.0-stlport-5.2.1\include\boost\proto\traits.hpp(691)
>> >> : error C2664: 'boost::proto::exprns_::expr<Tag,Args,Arity>::expr(const
>> >> boost::proto::exprns_::expr<Tag,Args,Arity> &)' : cannot convert
>> parameter
>> >> 1 from
>> >>
>> 'boost::proto::detail::as_expr<T,Generator,WantsBasicExpr>::result_type' to
>> >> 'const boost::proto::exprns_::expr<Tag,Args,Arity> &'
>> >>         with
>> >>         [
>> >>             Tag=boost::proto::tagns_::tag::terminal,
>> >>
>> >> Args=boost::proto::argsns_::term<boost::proto::detail::as_expr<const
>> char
>> >>
>> [10],boost::proto::detail::base_generator<boost::proto::default_generator>::type,false>::value_type>,
>> >>             Arity=0
>> >>         ]
>> >>         and
>> >>         [
>> >>             T=const char [10],
>> >>
>> >>
>> Generator=boost::proto::detail::base_generator<boost::proto::default_generator>::type,
>> >>             WantsBasicExpr=false
>> >>         ]
>> >>         and
>> >>         [
>> >>             Tag=boost::proto::tagns_::tag::terminal,
>> >>
>> >> Args=boost::proto::argsns_::term<boost::proto::detail::as_expr<const
>> char
>> >>
>> [10],boost::proto::detail::base_generator<boost::proto::default_generator>::type,false>::value_type>,
>> >>             Arity=0
>> >>         ]
>> >>         Reason: cannot convert from
>> >>
>> 'boost::proto::detail::as_expr<T,Generator,WantsBasicExpr>::result_type' to
>> >> 'const boost::proto::exprns_::expr<Tag,Args,Arity>'
>> >>         with
>> >>         [
>> >>             T=const char [10],
>> >>
>> >>
>> Generator=boost::proto::detail::base_generator<boost::proto::default_generator>::type,
>> >>             WantsBasicExpr=false
>> >>         ]
>> >>         and
>> >>         [
>> >>             Tag=boost::proto::tagns_::tag::terminal,
>> >>
>> >> Args=boost::proto::argsns_::term<boost::proto::detail::as_expr<const
>> char
>> >>
>> [10],boost::proto::detail::base_generator<boost::proto::default_generator>::type,false>::value_type>,
>> >>             Arity=0
>> >>         ]
>> >>         No constructor could take the source type, or constructor
>> overload
>> >> resolution was ambiguous
>> >>
>> >>
>> \Code\work\cmake-decomp\server\exchange\tools\uploadlog\uploader.cpp(1372)
>> >> : see reference to function template instantiation 'const
>> >> boost::add_const<T>::type boost::proto::functional::as_expr<>::operator
>> >> ()<char,10>(const char (&)[10]) const' being compiled
>> >>         with
>> >>         [
>> >>             T=boost::proto::detail::as_expr<const char
>> >>
>> [10],boost::proto::detail::base_generator<boost::proto::default_generator>::type,false>::result_type
>> >>         ]
>> >>
>> >
>> > _______________________________________________
>> > Unsubscribe & other changes:
>> http://lists.boost.org/mailman/listinfo.cgi/boost
>> >
>>
>> --
>> Eric Niebler
>> BoostPro Computing
>> http://www.boostpro.com
>>
>> _______________________________________________
>> Unsubscribe & other changes:
>> http://lists.boost.org/mailman/listinfo.cgi/boost
>>
>
>