QHash<float,int> and `qHash(const float&)' is ambiguous error

[babu198649]

Hi
The following code gives error.

QHash<float,int> hash;
hash.insert(-1.5,1);
 
/usr/local/Trolltech/Qt-4.4.2/include/QtCore/qhash.h:838: error: call of overloaded `qHash(const float&)' is ambiguous

QHash<float,int> hash;
hash.insert(-1.5,1);

/usr/local/Trolltech/Qt-4.4.2/include/QtCore/qhash.h:838: error: call of overloaded `qHash(const float&)' is ambiguous

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Where as if i use QMap instead of QHash such as

QMap<float,int> mmap;
mmap.insert(-1.5,1);

QMap<float,int> mmap;
mmap.insert(-1.5,1);

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then the code works fine.

[jpn]

From QHash docs:

Here's a list of the C++ and Qt types that can serve as keys in a QHash: any integer type (char, unsigned long, etc.), any pointer type, QChar, QString, and QByteArray. For all of these, the <QHash> header defines a qHash() function that computes an adequate hash value. If you want to use other types as the key, make sure that you provide operator==() and a qHash() implementation.