Re: [Boost-users] C++03 unique_ptr emulation

Subject: Re: [Boost-users] C++03 unique_ptr emulation
From: Howard Hinnant (hinnant_at_[hidden])
Date: 2009-03-07 22:16:57

On Mar 6, 2009, at 9:30 AM, Sergey Skorokhodov wrote:

> Hi,
>
> Howard Hinnant wrote:
>> I've put up a new version of an C++03 emulated unique_ptr here:
>
> <skip>
>
> I tried to use this implementation with MSVC 7.1 sp1 and 9.0 sp1 and  
> encounter ICE in the following code:

Sorry I don't have MSVC 7.1 to test against.  Fwiw I dropped your code  
(copy/paste) into g++ 4.0 and it compiled, linked and ran without any  
memory leak or other memory related problems.

-Howard

>
>
> <code>
>
> #include <cstdlib>
> #include <string>
> #include "unique_ptr.hpp"
>
>
> class Base
> {
> protected:
>    explicit Base( std::string const & src )
>    {
>        target.reset( new char[src.length() + 1] );
>        memcpy( target.get(), src.c_str(), src.length() );
>        target[src.length()]    =   '0';
>    }
>
>    explicit Base( boost::unique_ptr<char[]> src )
>    :   target( move(src) )
>    {}
>    virtual ~Base() {}
>
> private:
>    boost::unique_ptr<char[]> target;
> };
>
> class Derived : public Base
> {
> public:
>    explicit Derived( std::string const & src ) : Base( src ) {}
>    explicit Derived( boost::unique_ptr<char[]> src )
>        :   Base( move( src ) ) {}
>    virtual ~Derived() {}
> };
>
> int main(int argc, char * argv[])
> {
>    char const TEXT[]   =   "This is a text";
>    boost::unique_ptr<char[]> ptxt( new char[sizeof(TEXT)] );
>    Derived drv( move( ptxt ) );
>    return 0;
> }
>
> </code>
>
> Here is the exact compiler output:
>
> 1>c:\prj\vs2005\projects\unique_tsts\unique_tst\unique_tst.cpp(21) :  
> fatal error C1001: An internal error has occurred in the compiler.
> 1>(compiler file 'f:\dd\vctools\compiler\utc\src\p2\ehexcept.c',  
> line 1454)
> 1> To work around this problem, try simplifying or changing the  
> program near the locations listed above.
> 1>Please choose the Technical Support command on the Visual C++
> 1> Help menu, or open the Technical Support help file for more  
> information
> 1>Build log was saved at "file://c:\prj\VS2005\Projects\unique_tsts 
> \unique_tst\Debug\BuildLog.htm"
> 1>unique_tst - 1 error(s), 0 warning(s)
>
> Is something wrong with my code or is it a "pure" MSVC bug?
>
> TIA
>
> -- 
> Sergey Skorokhodov
>
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users