language: C++11 (gcc-4.7.2)
date: 659 days 20 hours ago
link:
visibility: public 
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#include <iostream>
 
// ::f
void f (int i) { std::cout << "::f\n" ; }
 
// Simple case
void OK1() {
  f (99) ; // Calls ::f
}
 
// Argument-dependend lookup
namespace MyNamespace {
struct S { int i ; } ;
void f (S& s) { std::cout << "MyNamespace::f\n" ; }
}
 
void OK2() {
  MyNamespace::S s ;
  f (99) ;   // Calls ::f
  f (s) ;    // Calls MyNamespace::f because the type of s is declared in MyNamespace
}
 
// Declaration of a class member (#1)
struct C {
  static void ERROR1() {
    MyNamespace::S s ;
    f (s) ;        // Error: MyNamespace::f not matched, because Y is empty (#1)
  }
  static void f() { // Declaration of a class member (#1)
    std::cout << "C::f\n" ;
  }
} ;
 
// Block-scope function declaration (#2)
void ERROR2() {
  void f() ; // Block-scope function declaration (#2)
  MyNamespace::S s ;
  f (s) ;    // Error: MyNamespace::f not matched, because Y is empty (#2)
}
 
// Declaration that is neither a function or a function template (#3)
void ERROR3() {
  MyNamespace::S s ;
  f (s) ;            // OK -- ::f called
  typedef int f[3] ; // Declaration that is neither a function or a function template (#3)
  f (s) ;            // Error: MyNamespace::f not matched, because Y is empty (#3). This is an initialiser
}
prog.cpp: In static member function 'static void C::ERROR1()':
prog.cpp:27:9: error: no matching function for call to 'C::f(MyNamespace::S&)'
prog.cpp:29:15: note: candidate is: static void C::f()
prog.cpp: In function 'void ERROR2()':
prog.cpp:38:7: error: too many arguments to function 'void f()'
prog.cpp:36:8: note: declared here
prog.cpp: In function 'void ERROR3()':
prog.cpp:46:7: error: conflicting declaration 'int s [3]'
prog.cpp:43:18: error: 's' has a previous declaration as 'MyNamespace::S s'