More from C++ Now 2014

[bearophile via Digitalmars-d]

> "Undefined Behavior in C++; what is it, and why should I care":
> https://github.com/boostcon/cppnow_presentations_2014/blob/master/files/Undefined-Behavior.pdf?raw=true
> This reminds us to remove as much undefined behavior as 
> possible from D.

Fixing some of those problems will break some D code. An example 
from the slides pack:

void main() {
     import std.stdio;
     auto arr = [0, 2, 4, 6, 8];
     int i = 1;
     writeln(i + arr[++i] + arr[i++]);
}


It gives different results in dmd and ldc2:

...>dmd -wi -run temp.d
9

...>ldmd2 -wi -run temp.d
10

Hopefully no one writes code like that, but this situation can't 
be accepted in a language that tries to be safer and better than 
C/C++.

Bye,
bearophile