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

Subject: Re: [Boost-users] C++03 unique_ptr emulation
From: Sergey Skorokhodov (ucayalyfish_at_[hidden])
Date: 2009-03-06 09:30:23

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:

<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