|
|
|
| 1 |
|
/*** |
| 2 |
|
*safebool.h - types and constants for implementing the "smart bool" idiom. |
| 3 |
|
* |
| 4 |
|
* Copyright (c) Microsoft Corporation. All rights reserved. |
| 5 |
|
* |
| 6 |
|
*Purpose: Prefer _safe_bool to an implicit conversion to bool. When a |
| 7 |
|
* type is implicitly convertible to bool, it is also implicitly |
| 8 |
|
* convertible to any integral type, and this is often not |
| 9 |
|
* desired. Instead, provide a conversion to _safe_bool, which |
| 10 |
|
* is really a pointer to a member function on a dummy struct. |
| 11 |
|
* This pointer can be evaluated in Boolean context, but it will |
| 12 |
|
* never be converted to an integral type. |
| 13 |
|
* |
| 14 |
|
* [Public] |
| 15 |
|
* |
| 16 |
|
****/ |
| 17 |
|
|
| 18 |
|
#pragma once |
| 19 |
|
|
| 20 |
|
#if !defined(_INC_MSCLR_SAFEBOOL) |
| 21 |
|
|
| 22 |
|
#ifndef __cplusplus_cli |
| 23 |
|
#error ERROR: msclr libraries are not compatible with /clr:oldSyntax |
| 24 |
|
#endif |
| 25 |
|
|
| 26 |
|
namespace msclr |
| 27 |
|
{ |
| 28 |
|
|