On Thursday, 14 April 2016 at 10:29:43 UTC, ag0aep6g wrote:
On 14.04.2016 12:14, Carlin wrote:
import std.stdio;
import std.bitmanip;
ubyte[] serialize(uint t)
{
ubyte[] bytes = nativeToBigEndian(t);
return bytes;
}
void main()
{
writeln(serialize(0));
}
Your code is wrong. It's really easy to get wrong, though. Too
easy probably.
nativeToBigEndian returns a fixed-size array. That's a value
type. By assigning it to a ubyte[], you're slicing the return
value. That is, you make a reference to temporary data. The
reference becomes invalid as soon the assignment is over, so
you're returning a slice to garbage memory.
To make a ubyte[] from the result of nativeToBigEndian, you
have to dup it:
----
ubyte[] serialize(uint t)
{
return nativeToBigEndian(t).dup;
}
----
Thanks, that works perfectly! I couldn't figure it out and I knew
I had to be missing something really basic. I still don't
understand though why it works in release but not in debug.
