/// <summary>
/// this implements the evaluation functionality, cannot be used directly
/// </summary>
/// <param name="tree">the parsetree itself</param>
/// <param name="paramlist">optional input parameters</param>
/// <returns>a partial result of the evaluation</returns>
internal object Eval(ParseTree tree, params object[] paramlist)
{
object Value = null;
switch (Token.Type)
{
case TokenType.Start:
Value = EvalStart(tree, paramlist);
break;
case TokenType.instruction_block:
Value = Evalinstruction_block(tree, paramlist);
break;
case TokenType.instruction:
Value = Evalinstruction(tree, paramlist);
break;
case TokenType.set_stmt:
Value = Evalset_stmt(tree, paramlist);
break;
case TokenType.if_stmt:
Value = Evalif_stmt(tree, paramlist);
break;
case TokenType.until_stmt:
Value = Evaluntil_stmt(tree, paramlist);
break;
case TokenType.lock_stmt:
Value = Evallock_stmt(tree, paramlist);
break;
case TokenType.unlock_stmt:
Value = Evalunlock_stmt(tree, paramlist);
break;
case TokenType.print_stmt:
Value = Evalprint_stmt(tree, paramlist);
break;
case TokenType.on_stmt:
Value = Evalon_stmt(tree, paramlist);
break;
case TokenType.toggle_stmt:
Value = Evaltoggle_stmt(tree, paramlist);
break;
case TokenType.wait_stmt:
Value = Evalwait_stmt(tree, paramlist);
break;
case TokenType.when_stmt:
Value = Evalwhen_stmt(tree, paramlist);
break;
case TokenType.onoff_stmt:
Value = Evalonoff_stmt(tree, paramlist);
break;
case TokenType.stage_stmt:
Value = Evalstage_stmt(tree, paramlist);
break;
case TokenType.clear_stmt:
Value = Evalclear_stmt(tree, paramlist);
break;
case TokenType.add_stmt:
Value = Evaladd_stmt(tree, paramlist);
break;
case TokenType.remove_stmt:
Value = Evalremove_stmt(tree, paramlist);
break;
case TokenType.log_stmt:
Value = Evallog_stmt(tree, paramlist);
break;
case TokenType.break_stmt:
Value = Evalbreak_stmt(tree, paramlist);
break;
case TokenType.preserve_stmt:
Value = Evalpreserve_stmt(tree, paramlist);
break;
case TokenType.declare_stmt:
Value = Evaldeclare_stmt(tree, paramlist);
break;
case TokenType.switch_stmt:
Value = Evalswitch_stmt(tree, paramlist);
break;
case TokenType.copy_stmt:
Value = Evalcopy_stmt(tree, paramlist);
break;
case TokenType.rename_stmt:
Value = Evalrename_stmt(tree, paramlist);
break;
case TokenType.delete_stmt:
Value = Evaldelete_stmt(tree, paramlist);
break;
case TokenType.edit_stmt:
Value = Evaledit_stmt(tree, paramlist);
break;
case TokenType.run_stmt:
Value = Evalrun_stmt(tree, paramlist);
break;
case TokenType.filevol_name:
Value = Evalfilevol_name(tree, paramlist);
break;
case TokenType.list_stmt:
Value = Evallist_stmt(tree, paramlist);
break;
case TokenType.reboot_stmt:
Value = Evalreboot_stmt(tree, paramlist);
break;
case TokenType.shutdown_stmt:
Value = Evalshutdown_stmt(tree, paramlist);
break;
case TokenType.for_stmt:
Value = Evalfor_stmt(tree, paramlist);
break;
case TokenType.unset_stmt:
Value = Evalunset_stmt(tree, paramlist);
break;
case TokenType.batch_stmt:
Value = Evalbatch_stmt(tree, paramlist);
break;
case TokenType.deploy_stmt:
Value = Evaldeploy_stmt(tree, paramlist);
break;
case TokenType.arglist:
Value = Evalarglist(tree, paramlist);
break;
case TokenType.expr:
Value = Evalexpr(tree, paramlist);
break;
case TokenType.and_expr:
Value = Evaland_expr(tree, paramlist);
break;
case TokenType.compare_expr:
Value = Evalcompare_expr(tree, paramlist);
break;
case TokenType.arith_expr:
Value = Evalarith_expr(tree, paramlist);
break;
case TokenType.multdiv_expr:
Value = Evalmultdiv_expr(tree, paramlist);
break;
case TokenType.factor:
Value = Evalfactor(tree, paramlist);
break;
case TokenType.atom:
Value = Evalatom(tree, paramlist);
break;
case TokenType.sci_number:
Value = Evalsci_number(tree, paramlist);
break;
case TokenType.number:
Value = Evalnumber(tree, paramlist);
break;
case TokenType.array_identifier:
Value = Evalarray_identifier(tree, paramlist);
break;
case TokenType.varidentifier:
Value = Evalvaridentifier(tree, paramlist);
break;
case TokenType.function_identifier:
Value = Evalfunction_identifier(tree, paramlist);
break;
default:
Value = Token.Text;
break;
}
return(Value);
}
protected virtual object EvalStart(ParseTree tree, params object[] paramlist)
{
return("Could not interpret input; no semantics implemented.");
}
protected object GetValue(ParseTree tree, TokenType type, int index)
{
return(GetValue(tree, type, ref index));
}