Example:
//---
import std.algorithm;
import std.stdio;
import std.array;
struct Forward
{
static struct P
{
string s;
}
P* _p;
this(string si)
{
_p = new P();
_p.s = si;
}
@property dchar front()
{
return _p.s.front;
}
void popFront()
{
_p.s.popFront();
}
bool empty()
{
return _p.s.empty;
}
}
void main()
{
auto s = Forward("abc");
auto s1 = Forward("ac");
s.countUntil(s1).writeln();
}
//---
Produces "1".
ROOT CAUSE ANALYSIS: The "problem" is "startsWith", which will consume both its input (both haystack and needle). Here, the first call to start with will consume the "a" of both "abc" and "ac". countUntil will the pop the b off of "bc", and finally, call startsWith on "c" and "c".
Recommend saving ranges before calling startsWith (if both are ranges), but a more efficient solution could be found.
Assigning to self.
Comment #1 by monarchdodra — 2012-10-14T13:45:39Z
(In reply to comment #0)
> Assigning to self.
Assigning to self.