Sean Campbell:
i have the following code
char[] Etag(string file){
auto info = DirEntry(file);
ubyte[16] hash = md5Of(to!string(info.timeLastAccessed.day)~
to!string(info.timeLastAccessed.month)~
to!string(~info.timeLastAccessed.year)~
file);
char[] hashstring = toHexString(hash);
writeln(hashstring);
return hashstring;
}
the proper hash string prints out in the console, but when i
try to use the return value of Etag it becomes an obscure
string?
As shown in the docs toHexString returns a fixed size array, that
in D are values. With "char[] hashstring = " you are slicing a
stack allocated variable, so Etag returns garbage. So you can
write (note the starting lowercase):
auto etag(string file) {
...
auto hashstring = toHexString(hash);
writeln(hashstring);
return hashstring;
}
Such kind of bugs are impossible in Rust. Hopefully we'll
eventually remove them from D too.
Bye,
bearophile
