code: private Stmt.Continue parseContinueStatement(EnclosingScope scope) {
  		int start = index;
  		// Match the continue keyword
  		Token t = match(Continue);
  		int end = index;
  		matchEndLine();
  		// Check that continue statement makes sense at this point.
  		if (!scope.isInLoop()) {
  			syntaxError("continue outside loop", t);
  		}
  		// Done.
  		return annotateSourceLocation(new Stmt.Continue(),start,end-1);
  	}
docs: Parse a continue statement, which is of the form:
  
  <pre>
  ContinueStmt ::= "continue"
  </pre>
  
  @param scope
  The enclosing scope for this statement, which determines the
  set of visible (i.e. declared) variables and also the current
  indentation level.
  
  @see wyc.lang.Stmt.Continue
  @return