Well, in msxml.tlh中可以看到如此類似的很多定義。爲了搞清楚XML文件到底是怎麼解析的。需要搞明白這些聲明的含義。
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__declspec(property(get=GetnodeName)) |
well, i look reference to the _declspec property in MSDN (web version). The digit i took from the web page is specific to microsoft visual studio 2005/.net framework 2.0.
Visual C++ language reference
Microsoft specific
This attribute be applied to non-static virtual data members in a class or structure definition. The compiler treats these virtual data members as data members by changing their reference into function calls.
| __declspec( property ( get = get_func_name )) declarator __declspec( property ( put = put_func_name )) declarator __declspec( property ( get = get_func_name, put = put_func_name)) declarator |
Remarks
when the compiler sees a data member declared with this attribute on the right of a member-selection operator (“.” or “->”), it converts the operation to a get or put function, depending on whether such an expression is an l-value or r-value. In more complicated context, such as “+=”, a rewrite is performed by doing both get and put.
This attribute can also be used in the declaration of an empty array in a class or structure definition.
For example:
| __declspec (property(get=GetX, put=PutX)) int x[]; |
The above statement indicates that x[] can be used with one ro more array indices. In this case, i=p->x[a][b] will be turned into i=p->GetX(a,b) and p->x[a][b]=i will be turned into p->PutX(a,b,i).
Example
// declspec_property.cpp
struct S {
int i;
void putprop(int j) {
i = j;
}
int getprop() {
return i;
}
__declspec(property(get = getprop, put = putprop)) int the_prop;
};
int main() {
S s;
s.the_prop = 5;
return s.the_prop;
}
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| _COM_SMARTPTR_TYPEDEF(IXMLDOMNode, __uuidof(IXMLDOMNode)); |
//_COM_SMARTPTR_TYPEDEF(Ix1, __uuidof(Ix1));展開的代碼就應該是
//typedef _com_ptr_t< _com_IIID > Ix1Ptr;
中文解釋就是定義了一個COM智能指針，指向接口的智能指針。
details about smart types technology article:
http://edndoc.esri.com/arcobjects/9.0/ArcGISDevHelp/DevelopmentEnvs/COM/VCpp/SmartTypes.htm