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Argument type of function and safe types and types, arguments can handle safely

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Groups,
I have few doubts regarding argument type of function and types, 
arguments can handle safely. I know these issues have been discussed at 
multiple places on internet. I wanted to see the big picture and needed 
opinion of C++ gurus

When you pass by value - Copy constructor is called (except for basic 
data type like int, float). you can pass the **same type variable** only

When you pass by reference - A reference will be intialized with pass 
value. you can pass **non-const same type or derived type** (passing a 
constant type will return in error)

When you pass by constant reference you can pass **const/non-const of 
same type or derived type**.

When you pass by pointer - pointer is assigned to passed value  you can 
pass **same type of derived type**.

Cases written above are safe conversion (no casting is needed). **C++ 
compiler will not allow any other conversion **. You can still use 
casting for not allowed cases.

My doubts are
- Have I captured all the cases or there are some more cases (I will 
appreciate a link to a small reference)

-What casts are safe e.g in case of pass by value casting from short to 
int seems perfectly safe. (I will appreciate a link to any document 
explaining safe casting)

thanks
Ittium

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Argument type of function and safe types and types, arguments can handle safely ittium <ittium@gmail.com> - 2011-12-08 12:01 +0530
  Re: Argument type of function and safe types and types, arguments can handle safely Paavo Helde <myfirstname@osa.pri.ee> - 2011-12-08 02:17 -0600
    Re: Argument type of function and safe types and types, arguments can handle safely 88888 Dihedral <dihedral88888@googlemail.com> - 2011-12-08 00:31 -0800
    Re: Argument type of function and safe types and types, arguments can handle safely ittium <ittium@gmail.com> - 2011-12-08 16:57 +0530
      Re: Argument type of function and safe types and types, arguments can handle safely Paavo Helde <myfirstname@osa.pri.ee> - 2011-12-08 12:32 -0600
        Re: Argument type of function and safe types and types, arguments can handle safely Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-12-08 20:00 +0000
          Re: Argument type of function and safe types and types, arguments can handle safely Paavo Helde <myfirstname@osa.pri.ee> - 2011-12-08 14:30 -0600
  Re: Argument type of function and safe types and types, arguments can handle safely Goran <goran.pusic@gmail.com> - 2011-12-09 03:05 -0800

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