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feat(bit): add at and subscript [] access for bit class

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DarkSharpness
2024-07-11 18:48:42 +08:00
parent f8bb311fcb
commit f3d2074a79
1 changed files with 10 additions and 0 deletions
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10
include/bit.h
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@ -1,5 +1,6 @@
#pragma once #pragma once
#include "target.h" #include "target.h"
#include "debug.h"
#include <version> #include <version>
#include <concepts> #include <concepts>
@ -71,6 +72,15 @@ struct Bit {
return Bit<_Hi - _Lo + 1>(this->_M_data >> _Lo); return Bit<_Hi - _Lo + 1>(this->_M_data >> _Lo);
} }
template <std::size_t _Len = 1>
constexpr auto at(target_size_t pos) const -> Bit <_Len> {
static_assert(_Len != 0, "Bit::at: _Len should be greater than 0");
debug::assert(pos + _Len <= _Nm, "Bit::at: pos out of range");
return Bit <_Len> (this->_M_data >> pos);
}
constexpr auto operator [](target_size_t pos) const -> Bit <1> { return this->at(pos); }
template <std::size_t _New = kMaxLength> template <std::size_t _New = kMaxLength>
constexpr auto zero_extend() const -> Bit<_New>; constexpr auto zero_extend() const -> Bit<_New>;