| title |
switch_is | Microsoft Docs |
| ms.custom |
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| ms.date |
11/04/2016 |
| ms.reviewer |
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| ms.suite |
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| ms.technology |
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| ms.tgt_pltfrm |
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| ms.topic |
language-reference |
| f1_keywords |
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| ms.assetid |
f1fffe5d-12d2-4e0f-8803-ccb715177d2d |
| caps.latest.revision |
9 |
| author |
mikeblome |
| ms.author |
mblome |
| manager |
ghogen |
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cs-cz |
de-de |
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Specifies the expression or identifier acting as the union discriminant that selects the union member.
Remarks
The switch_is C++ attribute has the same functionality as the switch_is MIDL attribute.
See the case example for a sample use of switch_is.
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| Applies to |
typedef |
| Repeatable |
No |
| Required attributes |
None |
| Invalid attributes |
None |
For more information about the attribute contexts, see Attribute Contexts.
IDL Attributes
Typedef, Enum, Union, and Struct Attributes
switch_type