/*****
 *

 * This is a functional interpreter for FMSL.  It uses JNI to access the parse
 * tree and symbol tables genereated by the Yacc parser.
 *

 * The implementation of the interpreter is non-object-oriented in that it
 * perfroms the execution traversal via driect recursive decent of the tree,
 * using a hidarchy of switch statemetns.  This is in contrast to an
 * object-oriented approach, that would define a class hierarchy for the tree
 * node structure, and implement tree node execution via an evel methoed
 * specialized for each subtype of node.
 *
 */