Spanner *spanner (vsize i);
Grob *grob (vsize i) const { return grobs_.at (i); }
vsize size () const { return grobs_.size (); }
- bool empty () const;
+ bool empty () const { return grobs_.empty (); }
void remove_duplicates ();
- void clear ();
+ void clear () { grobs_.clear (); }
void add (Grob *x) { grobs_.push_back (x); }
- void set_array (vector<Grob *> const &src);
- vector<Grob *> &array_reference ();
- vector<Grob *> const &array () const;
+ void set_array (vector<Grob *> const &src) { grobs_ = src; }
+ vector<Grob *> &array_reference () { return grobs_; }
+ vector<Grob *> const &array () const { return grobs_; }
static SCM make_array ();
+
+ // Remove grobs that do not satisfy the predicate, leaving the order
+ // unchanged.
+ void filter (bool (*predicate) (const Grob *));
+
+ // Run a function on all grobs in this array. If the function returns null,
+ // remove the original grob, reducing the size of the array. If the function
+ // returns a Grob, replace the original grob with the returned Grob.
+ void filter_map (Grob * (*map_fun) (Grob *));
+
+ // Like src.filter_map (f), but store the result in this array instead of
+ // mutating the input.
+ void filter_map_assign (const Grob_array &src, Grob * (*map_fun) (Grob *));
};