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mapnik::value_null - add <,<=,>,>= implementations

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This commit is contained in:
artemp 2016-01-25 12:26:57 +01:00
parent db9facef90
commit 9774f41b85
1 changed files with 20 additions and 0 deletions
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20
include/mapnik/value_types.hpp
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@ -80,6 +80,26 @@ struct MAPNIK_DECL value_null
return true; return true;
} }
bool operator>(value_null) const
{
return false;
}
bool operator>=(value_null) const
{
return false;
}
bool operator<(value_null) const
{
return false;
}
bool operator<=(value_null) const
{
return false;
}
template <typename T> template <typename T>
value_null operator+ (T const&) const value_null operator+ (T const&) const
{ {