Microsoft-specific modifiers
This section describes Microsoft-specific extensions to C++ in the following areas:
Based addressing, the practice of using a pointer as a base from which other pointers can be offset
Extended storage-class attributes declared with the __declspec keyword
The __w64 keyword
Microsoft-specific keywords
Many of the Microsoft-specific keywords can be used to modify declarators to form derived types. For more information about declarators, see Declarators.
Keyword | Meaning | Used to Form Derived Types? |
---|---|---|
__based | The name that follows declares a 32-bit offset to the 32-bit base contained in the declaration. | Yes |
__cdecl | The name that follows uses the C naming and calling conventions. | Yes |
__declspec | The name that follows specifies a Microsoft-specific storage-class attribute. | No |
__fastcall | The name that follows declares a function that uses registers, when available, instead of the stack for argument passing. | Yes |
__restrict | Similar to __declspec(restrict), but for use on variables. | No |
__stdcall | The name that follows specifies a function that observes the standard calling convention. | Yes |
__w64 | Marks a data type as being larger on a 64-bit compiler. | No |
__unaligned | Specifies that a pointer to a type or other data is not aligned.. | No |
__vectorcall | The name that follows declares a function that uses registers, including SSE registers, when available, instead of the stack for argument passing. | Yes |
See also
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