Example Program
Rooted Iterators
Example for some functions for handling (rooted) iterators.
File "rooted_iterator.cpp"
1#include <iostream>
2#include <seqan/sequence.h>
3#include <seqan/file.h>
4
5int main()
6{
7    seqan::String<char> str = "abcdefg";
The Iterator metafunction returns a rooted iterator by default. We can also specify the iterator kind explicitly by passing the iterator spec Rooted as second argument.
8    seqan::Iterator<seqan::String<char>, seqan::Rooted>::Type it = begin(str);
The same iterator spec can be used as a tag for functions that return an iterator, e.g. begin or end
9    it = end(str, seqan::Rooted());
A rooted iterator "knows" its container, so it supports the function container:
10    std::cout << container(it);          //output: "abcdefg"
Moreover, it is possible to apply functions like goBegin or position to rooted iterators without specify the container.
11    std::cout << position(it);           //output: 7
12
13    return 0;
14}
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