#include <compare.h>

详细描述

template<Bool ALLOW_UNDEFINED, EQUALITY EQ = EQUALITY::SHALLOW, typename OPERATOR_RANK = OverloadRank5>
class maxon::CompareTemplate< ALLOW_UNDEFINED, EQ, OPERATOR_RANK >

This class implements default compare and hash functions. They are used at various places such as DataType or HashMap . The class defines IsEqual and GetHashCode for the following cases:

• arithmetic and enumeration values
• pointers (where different pointers are assumed to be different keys, so only the address is considered, not the content)
• strong non-copy-on-write references (using their pointer)
• objects whose type has a GetHashCode member function and which can be compared with == The class defines Compare for the following cases:
• arithmetic values

For any other case you can specialize the template functions of DefaultCompare , or you have to define your own comparison and hash function class, see CStringCompare for the case of C-strings.

Note that hashes are not meant to be stored in files as they are only valid during runtime. The datatype for hashes is UInt which is variable in width.

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