diff options
Diffstat (limited to 'src/corelib/tools/qmap.h')
| -rw-r--r-- | src/corelib/tools/qmap.h | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/src/corelib/tools/qmap.h b/src/corelib/tools/qmap.h index 96ce787446..3f4f034b4e 100644 --- a/src/corelib/tools/qmap.h +++ b/src/corelib/tools/qmap.h @@ -51,6 +51,7 @@ #include <map> #include <new> +#include <functional> #ifdef Q_COMPILER_INITIALIZER_LISTS #include <initializer_list> @@ -61,11 +62,8 @@ QT_BEGIN_NAMESPACE /* QMap uses qMapLessThanKey() to compare keys. The default implementation uses operator<(). For pointer types, - qMapLessThanKey() casts the pointers to integers before it - compares them, because operator<() is undefined on pointers - that come from different memory blocks. (In practice, this - is only a problem when running a program such as - BoundsChecker.) + qMapLessThanKey() uses std::less (because operator<() on + pointers can be used only between pointers in the same array). */ template <class Key> inline bool qMapLessThanKey(const Key &key1, const Key &key2) @@ -75,8 +73,7 @@ template <class Key> inline bool qMapLessThanKey(const Key &key1, const Key &key template <class Ptr> inline bool qMapLessThanKey(const Ptr *key1, const Ptr *key2) { - Q_STATIC_ASSERT(sizeof(quintptr) == sizeof(const Ptr *)); - return quintptr(key1) < quintptr(key2); + return std::less<const Ptr *>()(key1, key2); } struct QMapDataBase; |