Re: Initialisation of reference vs. initialisation of reference member

2:

About the error you saw, MSDN says this:
'reference' : initialization of reference member requires a temporary
variable

A constructor initializes a reference to a member instead of
initializing the member.

It is invalid to initialize a reference member of a class in the
class's constructor with a temporary variable. An attempt to do so
generates the C2354 error, as illustrated by this sample code:

// C2354.cpp
int temp() { return 1; }
class Test
{
public:
   int member;
   int& ref_member;
   Test();
};

Test::Test() : ref_member( temp() )
{ // C2354
}
When this error is encountered, the solution is to change the code so
that the reference member is not initialized to a temporary variable.
The reference must be initialized to an object that will exist for the
lifetime of the reference member.
------------------------------------------------------------------------------------

So it seems that the 2 in the constructor call is being treated as a
temporary variable. and not as something in the global memory.