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// ============================================================================
// $Id$
//
// = LIBRARY
// orbsvcs
//
// = FILENAME
// Interpreter.h
//
// = AUTHOR
// Seth Widoff <sbw1@cs.wustl.edu>
//
// ============================================================================
#ifndef TAO_INTERPRETER_H
#define TAO_INTERPRETER_H
#include "Constraint.h"
#include "Constraint_Nodes.h"
class TAO_Interpreter
// = TITLE
// TAO_Interpreter is the superclass for all interpreters. It's
// build tree method invoke the yacc parser to parse a constraint
// or preference string.
{
protected:
TAO_Interpreter (void) : root_ (0) {}
~TAO_Interpreter (void);
int build_tree (const char* preferences);
// Using the Yacc generated parser, construct an expression
// tree representing <constraints> from the tokens returned by it.
static int is_empty_string (const char* str);
TAO_Constraint* root_;
// The root of the expression tree, not equal to null if build_tree
// successfully builds a tree from the constraints.
};
#endif /* TAO_Interpreter */
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