projects / wxWidgets.git / blame
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|---|---|---|
| 0fb0ecc4 VZ |
1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: wx/meta/convertible.h | |
| 3 | // Purpose: Test if types are convertible | |
| 4 | // Author: Arne Steinarson | |
| 5 | // Created: 2008-01-10 | |
| 6 | // RCS-ID: $Id$ | |
| 7 | // Copyright: (c) 2008 Arne Steinarson | |
| 8 | // Licence: wxWindows licence | |
| 9 | ///////////////////////////////////////////////////////////////////////////// | |
| 10 | ||
| 4f927337 VS |
11 | #ifndef _WX_META_CONVERTIBLE_H_ |
| 12 | #define _WX_META_CONVERTIBLE_H_ | |
| 0fb0ecc4 VZ |
13 | |
| 14 | // Helper to decide if an object of type D is convertible to type B (the test | |
| 15 | // succeeds in particular when D derives from B) | |
| 16 | template <class D, class B> | |
| 17 | struct wxConvertibleTo | |
| 18 | { | |
| 19 | static char Match(B* pb); | |
| 20 | static int Match(...); | |
| 21 | ||
| 22 | enum { value = sizeof(Match(static_cast<D*>(NULL))) == sizeof(char) }; | |
| 23 | }; | |
| 24 | ||
| 4f927337 | 25 | #endif // _WX_META_CONVERTIBLE_H_ |
| 0fb0ecc4 | 26 |