Skip to content

Latest commit

 

History

History
executable file
·
98 lines (68 loc) · 2.43 KB

integer.md

File metadata and controls

executable file
·
98 lines (68 loc) · 2.43 KB
Raw

Boost.Integer

  • lib: boost/libs/integer
  • repo: boostorg/integer
  • commit: 162e48d1, 2017-03-31

Integer Traits

Header <boost/integer_traits.hpp>

  • Inherites from std::numeric_limits
  • Provide static value const_min and const_max

Integer Type Selection

Header <boost/integer.hpp>

Trait classes

  • int_fast_t<LeastType>
    • fast, and type to be fast type to store LeastType
  • int_t<Bits>
  • uint_t<Bits>
    • least is type at least with required size.
    • fast is fastest type supports required size.
    • exact is exact sized type.
  • int_max_value_t<MaxValue>
  • int_min_value_t<MinValue>
  • uint_value_t<MaxValue>
    • least is type with size at least support required value.
    • fast is fastest type supports required value.

Integer Bit Masks

Header <boost/integer/integer_mask.hpp>

  • high_bit_mask_t<Bit> - Single bit mask at position Bit
    • least is least type for mask value.
    • fast is fast type for mask value.
    • high_bit, mask value with least type.
    • high_bit_fast, mask value with fast type.
    • bit_position, value of Bit.
  • low_bits_mask_t<Bits> - Bit mask of all low Bits positions
    • least is least type for mask value.
    • fast is fast type for mask value.
    • sig_bits, mask value with least type.
    • sig_bits_fast, mask value with fast type.
    • bit_count, value of Bits.

Integer Helpers

Compile-Time Integer log2

Header <boost/integer/static_log2.hpp>

Trait class static_log2<Value>.

Run-Time Integer log2

Header <boost/integer/integer_log2.hpp>

Function integer_log2<T>(T value) -> int.

Compile-Time Integer Min/Max

Header <boost/integer/static_min_max.hpp>

Trait class static_signed_min<V1,V2>, static_signed_max<V1,V2>, static_unsigned_min<V1,V2>, and static_unsigned_max<V1,V2>.

Integer GCD/LCM

Header <boost/integer/common_factor.hpp>

Trait class static_gcd<V1,V2>, static_lcm<V1,V2> (Compile time). Functors gcd_evaluator<IntType> and lcm_evaluator<IntType> (Runtime). Functions gcd<IntType>(IntType const&, IntType const&) -> IntType and lcm.

Dependency

Boost.Config

  • <boost/config.hpp>, <boost/detail/workaround.hpp>
  • <boost/limits.hpp>, <boost/cstdint.hpp>

Boost.StaticAssert

  • <boost/static_assert.hpp>

Standard Facilities

Language: constexpr (C++11) Standard Library: <cstdint> (C++11)