On Sunday, 4 March 2018 at 12:57:41 UTC, aliak wrote:
@property int front(D d) { return 2; }
@property bool empty(D d) { return false; }
void popFront(D d) {}
Those functions are in scope for your function, but not inside std.range.
in other words std.range hasn't imported your module, so it can't see those three functions.
