c++ - how to solve name collision between Type Name, Function Name and parameter name? -

for example ,i has code:

struct range { }  struct fooobj {      void range(int x, range** r){....}     //!< ok.      void foo(int x, range** r) {....}      //!< not ok, why? } 

then fix function foo(int,range**) to:

void foo(int x, struct range** r){...} 

the name collision has been solved,but why function range() has no name collision?

btw, test code in vs2010.

because ::foo::range hides ::range. @ easier example:

int i;  void foo() {     int i;      = 1; // local variable `i`.     ::i = 1; // global variable `i`. } 

yes. q.e.d.

to use struct range, use ::range.

(and need remove void of void foo(... constructor. live example)