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bitwise: use free equality operator for bitfields

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Danny Robson 2019-02-03 16:38:40 +11:00
parent 5cdabcb583
commit fd1fda9145
1 changed files with 11 additions and 3 deletions
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14
bitwise.hpp
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@ -156,16 +156,24 @@ namespace cruft {
constexpr ValueT get (void) const constexpr ValueT get (void) const
{ {
auto const MASK = ~(~0u << SizeV); auto const MASK = ~(~0u << SizeV);
return (value >> OffsetV) & MASK; ValueT shifted = value >> OffsetV;
ValueT masked = shifted & MASK;
return masked;
} }
operator auto() const { return get (); } operator ValueT () const { return get (); }
decltype(auto) operator+ () const { return +get (); } auto operator+ () const { return +get (); }
ValueT value; ValueT value;
}; };
template <typename OperandT, typename BitfieldT, size_t OffsetV, size_t SizeV>
bool operator== (bitfield<BitfieldT,OffsetV,SizeV> const &a, OperandT const &b)
{
return a.get () == b;
}
template <typename ValueT, size_t Offset, size_t Size> template <typename ValueT, size_t Offset, size_t Size>
std::ostream& operator<< (std::ostream &os, bitfield<ValueT,Offset,Size> const &val) std::ostream& operator<< (std::ostream &os, bitfield<ValueT,Offset,Size> const &val)