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Limitations on the Location of a Default Arguments Declaration

Limitations on the Location of a Default Arguments Declaration

Default arguments shall be specified only in the parameter-declaration-clause of a function declaration or in a template-parameter. This means that default arguments cannot appear in declarations of pointers to functions, references to functions, or typedef declarations:

           void f( int n = 0); //OK  //the following declarations are all illegal  void (&rf) (int n = 0) = f;  //reference to function  void (*pf) (int n = 0) ;   //pointer to function  typedef void (*pfi) (int n = 0);  //typedef
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