jmmcg::LIBJMMCG_VER_NAMESPACE::mpl::lsb_bitmask< MSetBit > Struct Template Reference

Create a bitmask of a contiguous block of zeros, then ones, starting at the compile-time constant, input number. More...

#include <bit_fiddling.hpp>

Public Types
enum	: element_type { value =MSetBit|(lsb_bitmask<(MSetBit>>1u)>::value) }
typedef unsigned long long	element_type

Static Public Attributes
constexpr static element_type	number =MSetBit

Detailed Description

template<unsigned long long MSetBit>
struct jmmcg::LIBJMMCG_VER_NAMESPACE::mpl::lsb_bitmask< MSetBit >

Create a bitmask of a contiguous block of zeros, then ones, starting at the compile-time constant, input number.

Because the operator>>() is poorly defined this only works for unsigned types. This is because there may be a sign bit or two's complement representation of the negative number. Then shifting might cause the sign bit to be shifted into the number itself, possibly causing an infinite loop.

Complexity: compile-time: O(n) where n is at most the number of bits used to represent the input type. run-time: O(1) Space: O(1)

Definition at line 34 of file bit_fiddling.hpp.

Member Typedef Documentation

element_type

template<unsigned long long MSetBit>

typedef unsigned long long jmmcg::LIBJMMCG_VER_NAMESPACE::mpl::lsb_bitmask< MSetBit >::element_type

Definition at line 35 of file bit_fiddling.hpp.

Member Enumeration Documentation

anonymous enum

template<unsigned long long MSetBit>

anonymous enum : element_type

Enumerator
value

Definition at line 39 of file bit_fiddling.hpp.

Member Data Documentation

number

template<unsigned long long MSetBit>

constexpr static element_type jmmcg::LIBJMMCG_VER_NAMESPACE::mpl::lsb_bitmask< MSetBit >::number =MSetBit

staticconstexpr

Definition at line 37 of file bit_fiddling.hpp.

---

The documentation for this struct was generated from the following file:

• core/bit_fiddling.hpp