Re: [boost] Unnamed namespaces?

From: Eric Niebler (eric_at_[hidden])
Date: 2007-06-15 12:51:29

shunsuke wrote:
> Eric Niebler wrote:
>> If you are using the above formulation, then the reference is not 
>> initialized until runtime. Due to order of initialization issues, you 
>> could end up indirecting through an uninitialized reference and crash 
>> even before you hit main().
> 
> Sorry, could you give me any example such that
> type const &name = get_static_local<type>(); might cause a crash?

//////////
//test.hpp
template<typename T>
T const & get_static_local()
{
   static S const s;
   return s;
}

struct S { int i; };

namespace
{
   S const & s = get_static_local<S>();
}

S const & get1();
S const & get2();

////////////
// test1.cpp
#include "./test.hpp"

S const & get1( )
{
   return s;
}

int i = get2().i;

////////////
// test2.cpp
#include "./test.hpp"

S const & get2( )
{
   return s;
}

int j = get1().i;

int main()
{
   return 0;
}

Compiles and links just fine, crashes and burns even before entering main().

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com
The Astoria Seminar ==> http://www.astoriaseminar.com