slightly more standard data merge: Symtax.merge (K true) avoids equality on abstract type Pretty.T and gracefully accepts overriding, Symtab.join prefers first entry as usual;
/***************************************************************************
Title: GraphBrowser/AWTFontMetrics.java
Author: Gerwin Klein, TU Muenchen
AbstractFontMetrics avoids dependency on java.awt.FontMetrics in
batch mode.
***************************************************************************/
package GraphBrowser;
public interface AbstractFontMetrics {
public int stringWidth(String str);
public int getAscent();
public int getDescent();
}