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: 2012-05-15 13:05:21

Has anyone been able to reproduce the issue via the sample I've provided
below? Simply paste the code in a new CPP file in Visual Studio .NET 2003
and compile :)

On Mon, May 14, 2012 at 4:53 PM, Robert Dailey <rcdailey.lists_at_[hidden]>wrote:

> Here is a small sample that reproduces the issue. Compile this using
> Visual Studio .NET 2003 and use Boost v1.49
>
> #include <string>
> #include <boost/xpressive/xpressive.hpp>
>
> int test()
> {
> std::string _serverName = "MY-MACHINE";
>
> using namespace boost::xpressive;
>
> { // This breaks
> sregex r = bos >> _serverName >> (as_xpr(".pushsvcs")|"a");
>  }
>
> { // This does NOT break
> sregex r = bos >> _serverName >> (as_xpr(".pushsvcs")|'a');
>  }
>
> { // This does NOT break
> sregex r = bos >> _serverName >> (as_xpr((char const*)".pushsvcs")|"a");
>  }
> }
>
> On Mon, May 14, 2012 at 12:07 PM, Robert Dailey <rcdailey.lists_at_[hidden]>wrote:
>
>> Sorry I sent my last email too soon. Let me provide a more detailed
>> example.
>>
>> This fails to compile:
>> bos >> _serverName >> (as_xpr(".pushsvcs")|".access")
>>
>> But this compiles just fine (if I add an as_xpr() wrapper around
>> ".access"):
>> bos >> _serverName >> (as_xpr(".pushsvcs")|as_xpr(".access"))
>>
>>  This is odd... shouldn't the former work just fine? It doesn't fail to
>> compile on MSVC v9
>>
>>
>> On Mon, May 14, 2012 at 12:05 PM, Robert Dailey <rcdailey.lists_at_[hidden]
>> > wrote:
>>
>>> 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
>>>>>
>>>>
>>>>
>>>
>>
>