Different ways to construct the same loop in C++

valid_cpp_loops.cpp

#include <iostream>
using namespace std;

#ifdef __cplusplus 
extern "C" {
#endif

void loop();

#ifdef __cplusplus 
}
#endif

void loop(){
	int i = 5;
	while (i --\
                    \
                     \
                      \
                       \
                        \
                         > 0) {printf("%d\n", \
                                               \   
                                                \ 
                                                 \
                                                  \
                                                   \
                                                    \
                                                    i\
                                                     )\
                                                       \
                                                        \
                                                        ;\
                                                          \
                                                          }\
                                                             // \ // \ //
                                                             // -------- \
                                                             ayyyyyyy lmao
}

int main() { 
  for (int i = 4; i >= 0; --i) {
    cout << i << "\n";
  }
  
  int i = 5;
  while (i --> 0) {
    cout << i << "\n";
  }
  
  i = 5;
  while (i > 0) {
    cout << --i << "\n";
  }
  
  for (int i : {4, 3, 2, 1, 0}) {
    cout << i << "\n";
  }
  
  loop();
  
  return 0;
}

Compiles on LLVM version 7.3.0 (clang-703.0.31) with -std=c++14 flag