//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================

#ifndef DMELEMENTHANDLE_H
#define DMELEMENTHANDLE_H

#ifdef _WIN32
#pragma once
#endif

//-----------------------------------------------------------------------------
// handle to an CDmElement
//-----------------------------------------------------------------------------
#define PERFORM_HANDLE_TYPECHECKING 0
#if PERFORM_HANDLE_TYPECHECKING

// this is here to make sure we're being type-safe about element handles
// otherwise, the compiler lets us cast to bool incorrectly
// the other solution would be to redefine DmElementHandle_t s.t.
// DMELEMENT_HANDLE_INVALID==0
struct DmElementHandle_t {
    DmElementHandle_t() : handle(0xffffffff) {}
    explicit DmElementHandle_t(int h) : handle(h) {}
    inline bool operator==(const DmElementHandle_t &h) const {
        return handle == h.handle;
    }
    inline bool operator!=(const DmElementHandle_t &h) const {
        return handle != h.handle;
    }
    inline bool operator<(const DmElementHandle_t &h) const {
        return handle < h.handle;
    }
    //	inline operator int() const { return handle; } // if we're okay with
    //implicit int casts, uncomment this method
    int handle;
};
const DmElementHandle_t DMELEMENT_HANDLE_INVALID;

#else  // PERFORM_HANDLE_TYPECHECKING

enum DmElementHandle_t { DMELEMENT_HANDLE_INVALID = 0xffffffff };

#endif  // PERFORM_HANDLE_TYPECHECKING

#endif  // DMELEMENTHANDLE_H