Re: [Boost-users] [context] How to set stack pointer in a platform-independent way?

2014-09-21 1:48 GMT+08:00 Nat Goodspeed :

On Sat, Sep 20, 2014 at 3:20 AM, TONGARI J wrote:

...

I guess something like below should work?

#include <iostream>

__attribute__((noinline)) bool is_upward_test(char* a) { char b[32]; return a < b; }

bool is_upward() { char a[32]; return is_upward_test(a); }

int main(int argc, char** argv) { std::cout << is_upward(); return 0; }

Doesn't the standard say pointer comparisons are only defined between pointers into the same container? Therefore wouldn't the above be UB?

o_O!? That would be scary, do you really mean pointer or iterator? Where's the paragraph?