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OregonGhost

Registriert seit: 8. Jun 2002
Ort: Lübeck
1.216 Beiträge
 
Delphi 3 Professional
 
#5

Re: Beste Umsetzung für read/write von Attributen in C++

  Alt 30. Aug 2004, 12:09
Zitat von NicoDE:
Die 'Properties' gibt es nur in 'managed C++' (die Zuordnung wird durch eine Nomenklatur automatisiert).
Zitat von MSDN Library von Visual Studio 6:
Microsoft Specific —>

__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

This attribute can 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 references into function calls.

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 an r-value. In more complicated contexts, 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 or 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);

END Microsoft Specific
Oregon Ghost
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Wenn NULL besonders groß ist, ist es fast schon wie ein bisschen eins.
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