ExitInstruction.cpp

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/******************************************************************************/
/* REXX Translator                                                            */
/*                                                                            */
/* Primitive Exit Parse Class                                                 */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "RexxActivation.hpp"
#include "ExitInstruction.hpp"
 
RexxInstructionExit::RexxInstructionExit(
    RexxObject *_expression)            /* associated EXIT expression        */
/****************************************************************************/
/* Function:  Complete initialization of an EXIT instruction                */
/****************************************************************************/
{
                                       /* just save the expression          */
  OrefSet(this, this->expression, _expression);
}
 
void RexxInstructionExit::execute(
    RexxActivation      *context,      /* current activation context        */
    RexxExpressionStack *stack )       /* evaluation stack                  */
/****************************************************************************/
/* Function:  Execute a REXX EXIT instruction                               */
/****************************************************************************/
{
    context->traceInstruction(this);     /* trace if necessary                */
    if (this->expression != OREF_NULL) /* given an expression value?        */
    {
        /* evaluate the expression           */
        RexxObject *result = this->expression->evaluate(context, stack);
        context->traceResult(result);      /* trace if necessary                */
                                           /* get the expression value and tell */
        context->exitFrom(result);         /* the activation to exit with it    */
    }
    else
    {
        context->exitFrom(OREF_NULL);      /* exit with no value                */
    }
}