?? using9.c
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// { dg-do compile }// Origin: C++ Standard Draft (7.3.3/12)// PR c++/2294: using declarations should not conflict, but only cause// an ambiguous overload set to be created.namespace B { void f(int); // { dg-error "note" } void f(double); // { dg-error "note" }}namespace C { void f(int); // { dg-error "note" } void f(double); // { dg-error "note" } void f(char); // { dg-error "note" }}void h(){ using B::f; using C::f; f('h'); f(1); // { dg-error "ambiguous" } void f(int); // { dg-error "previous using declaration" }}void m(){ void f(int); using B::f; // { dg-error "already declared" }}?? 快捷鍵說明
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