c++ - Declaring using statement after namespace declaration -

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i writing utility library made of several "packages". classes in each package contained in various namespaces. have idea how can simplify situation automatically declaring using statements @ end of class declarations (see below), avoid having programmer in cpp file.

namespace utility {     class string     {         // class implementation     }; }  using utility::string;

my understanding if user includes header string.h , string in utility programmer want use string. bad if there outside classes chain including bunch of files dirty namespace thought how making #define instead.

namespace utility {     class string     {         // class implementation     }; }  #ifdef auto_declare_namespace     using utility::string; #endif

that way, programmers want extended functionality can it.

would idea or there i'm overlooking?

there no point in using namespaces if going add using declaration each , every name declared in namespace.

let users of header files decide how want use headers. if wants use using declaration, let him in .cpp file directly; make code in .cpp file clearer since apparent name originated.


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