ReturnInstruction.cpp

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/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved.    */
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/******************************************************************************/
/* REXX Translator                                                            */
/*                                                                            */
/* Primitive Return Parse Class                                               */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "RexxActivation.hpp"
#include "ReturnInstruction.hpp"
 
RexxInstructionReturn::RexxInstructionReturn(
    RexxObject *_expression)            /* assciated expression              */
/******************************************************************************/
/* Function:  Complete initialization of a RETURN instruction                 */
/******************************************************************************/
{
                                       /* save the expression               */
  OrefSet(this, this->expression, _expression);
}
 
void RexxInstructionReturn::execute(
    RexxActivation      *context,      /* current activation context        */
    RexxExpressionStack *stack)        /* evaluation stack                  */
/******************************************************************************/
/* Function:  Execute a REXX RETURN 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->returnFrom(result);       /* the activation to return with it  */
    }
    else
    {
        context->returnFrom(OREF_NULL);    /* return with no value              */
    }
}