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c++ Programming Glossary: sanedoubleAre IEEE floats valid key types for std::map and std::set? http://stackoverflow.com/questions/4816156/are-ieee-floats-valid-key-types-for-stdmap-and-stdset entry to the map not on every comparison as above. struct SaneDouble double value SaneDouble double d value d if d d throw std logic_error.. every comparison as above. struct SaneDouble double value SaneDouble double d value d if d d throw std logic_error static friend.. d if d d throw std logic_error static friend bool operator SaneDouble lhs SaneDouble rhs return lhs.value rhs.value possibly a conversion..
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