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#ifndef VOICE_HH
#define VOICE_HH


#include "list.hh"
#include "request.hh"

/// class for  horizontal stuff.
struct Voice {
    PointerList<Voice_element *> elts;
    Real start;

    /****************/
    Real when(const Voice_element*)const;
    Real last() const;
    Voice();
    void add(Voice_element*);
    void print() const;
};
/**

    Voice is a ordered row of Voice_elements. It is strictly horizontal:
    you cannot have two rhythmic elements running parallel in a Voice

    */

struct Voicegroup {
    /// don't know how to identify these.
};

/// 
struct Voice_element {
    Real duration;
    const Voicegroup *group;
    const Voice *voice;
    PointerList<Request*> reqs;

    List<const Item *> granted_items;
    List<const Spanner *> granted_spanners;
    void add(Request*);
    Voice_element();

    void print ()const;
};
/** Apart from being a container for the requests, Voice_element is
    glue between related items and spanners, between requests and
    (voice)groups
    */
#endif