Getting hold of parameters in constructor

I have a class defined as follows:

class SomeClass
{

public:

	SomeClass( SomeType& SomeThing, AnotherType& SomeThingElse,
        YetAnotherType& YouAintSeenThis);
};

This constructor is the only function in the class definition.  I am
trying to write a class to handle members of SomeClass.  How can I get
hold of the parameters such as SomeThing, SomeThingElse and
YetAnotherType without changing SomeClass?

In other words, suppose x is a member of SomeClass.  What is the c++
for "the variable SomeThing (of type SomeType)  that was used in the
construction of x"     ?

Thank you for your help.

Paul Epstein