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: 2012-05-11 12:56:49

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
>         ]
>