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/* Copyright (c) 2005-2014 Rexx Language Association. All rights reserved.    */
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/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Kernel                                               ParseTrigger.hpp */
/*                                                                            */
/* Primitive PARSE instruction parsing trigger Class Definitions              */
/*                                                                            */
/******************************************************************************/
#ifndef Included_RexxInstructionTrigger
#define Included_RexxInstructionTrigger

typedef enum
{
    TRIGGER_NONE,
    TRIGGER_END,
    TRIGGER_PLUS,
    TRIGGER_MINUS,
    TRIGGER_ABSOLUTE,
    TRIGGER_STRING,
    TRIGGER_MIXED,
    TRIGGER_PLUS_LENGTH,
    TRIGGER_MINUS_LENGTH,
} ParseTriggerType;

class RexxTarget;
class RexxVariableBase;

class ParseTrigger : public RexxInternalObject
{
 public:
    void        *operator new(size_t, size_t);
    inline void  operator delete(void *) { }

    ParseTrigger(ParseTriggerType, RexxInternalObject *, size_t, QueueClass *);
    inline ParseTrigger(RESTORETYPE restoreType) { ; };

    void live(size_t) override;
    void liveGeneral(MarkReason reason) override;
    void flatten(Envelope *) override;

    size_t integerTrigger(RexxActivation *context, ExpressionStack *stack);
    RexxString *stringTrigger(RexxActivation *context, ExpressionStack *stack);
    void        parse(RexxActivation *, ExpressionStack *, RexxTarget *);

protected:

    ParseTriggerType  triggerType;       // type of trigger
    RexxInternalObject *value;           // value associated with trigger (can be an expression)
    size_t      variableCount;           // count of variables to assign after applying trigger
    RexxVariableBase *variables[1];      // after applying trigger
};
#endif