The Spirit Parser Library: Inline Parsing in C++

Listing 5: The Kleene star class implementation

//  Copyright (c) 2001, Joel de Guzman and Dan Nuffer
//  Permission is granted to use this code without restriction as
//  long as this copyright notice appears in all source files.

template <typename S>
struct kleene_star
    : public unary<S>
    , public parser<kleene_star<S> >
{
    kleene_star(S const& a)
    : unary<S>(a) {}

    template <typename IteratorT>
    match parse(IteratorT& first, IteratorT const& last) const
    {
        match hit(0);
        while (match next = this->subject().parse(first, last))
            hit += next;
        return hit;
    }
};