init the molecule, we assume that
DIMENSIONS = (Interval (0,0),Interval (0,0)
*/
-class Molecule {
+class Molecule
+{
+ friend SCM ly_set_molecule_extent_x (SCM, SCM, SCM);
+
Box dim_;
SCM expr_;
DECLARE_UNSMOB(Molecule,molecule);
-SCM fontify_atom (Font_metric*, SCM atom);
+SCM fontify_atom (Font_metric const*, SCM atom);
Molecule create_molecule (SCM brew_molecule);