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#include <iostream>
using namespace std;
 
namespace Your{
	struct Foo{
		int i = 5;
		Foo(){}
		Foo(Foo &foo){
			i = foo.i;
		}
	};
}
 
namespace Mine{
	struct Foo{
		int i = 5;
		Foo(){}
		Foo(const Foo &foo){
			i = foo.i;
		}
	};
}
 
 
int main(){
	{const Mine::Foo foo, copiedFoo(foo);}
	{const Your::Foo foo, copiedFoo(foo);}
	return 0;
}

prog.cpp: In function 'int main()':
prog.cpp:27:37: error: no matching function for call to 'Your::Foo::Foo(const Your::Foo&)'
  {const Your::Foo foo, copiedFoo(foo);}
                                     ^
prog.cpp:27:37: note: candidates are:
prog.cpp:8:3: note: Your::Foo::Foo(Your::Foo&)
   Foo(Foo &foo){
   ^
prog.cpp:8:3: note:   no known conversion for argument 1 from 'const Your::Foo' to 'Your::Foo&'
prog.cpp:7:3: note: Your::Foo::Foo()
   Foo(){}
   ^
prog.cpp:7:3: note:   candidate expects 0 arguments, 1 provided

Standard output is empty