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use crate::{Int, Signed, UnsignedInt};
/// Signed integers.
pub trait SignedInt: Int + Signed {
/// The unsigned integer type with the same size.
type U: UnsignedInt;
/// Checked absolute value.
#[must_use]
fn checked_abs(self) -> Option<Self>;
/// Saturating absolute value.
#[must_use]
fn saturating_abs(self) -> Self;
/// Wrapping (modular) absolute value.
#[must_use]
fn wrapping_abs(self) -> Self;
/// Computes the absolute value of `self`, with overflow information.
#[must_use]
fn overflowing_abs(self) -> (Self, bool);
/// Computes the absolute value of `self` without any wrapping or panicking.
#[must_use]
fn unsigned_abs(self) -> Self::U;
/// Checked negation.
#[must_use]
fn checked_neg(self) -> Option<Self>;
/// Saturating integer negation.
#[must_use]
fn saturating_neg(self) -> Self;
/// Wrapping (modular) negation.
#[must_use]
fn wrapping_neg(self) -> Self;
/// Negates self, overflowing if this is equal to the minimum value.
#[must_use]
fn overflowing_neg(self) -> (Self, bool);
/// Checked addition with an unsigned integer.
#[must_use]
fn checked_add_unsigned(self, rhs: Self::U) -> Option<Self>;
/// Saturating addition with an unsigned integer.
#[must_use]
fn saturating_add_unsigned(self, rhs: Self::U) -> Self;
/// Wrapping (modular) addition with an unsigned integer.
#[must_use]
fn wrapping_add_unsigned(self, rhs: Self::U) -> Self;
/// Calculates `self` + `rhs` with an unsigned `rhs`.
#[must_use]
fn overflowing_add_unsigned(self, rhs: Self::U) -> (Self, bool);
/// Checked subtraction with an unsigned integer.
#[must_use]
fn checked_sub_unsigned(self, rhs: Self::U) -> Option<Self>;
/// Saturating subtraction with an unsigned integer.
#[must_use]
fn saturating_sub_unsigned(self, rhs: Self::U) -> Self;
/// Wrapping (modular) subtraction with an unsigned integer.
#[must_use]
fn wrapping_sub_unsigned(self, rhs: Self::U) -> Self;
/// Calculates `self` - `rhs` with an unsigned `rhs`.
#[must_use]
fn overflowing_sub_unsigned(self, rhs: Self::U) -> (Self, bool);
/// Returns the bit pattern of `self` reinterpreted as an unsigned integer of the same size.
#[must_use]
fn cast_unsigned(self) -> Self::U;
/// Returns a number representing sign of `self`.
#[must_use]
fn signum(self) -> Self;
/// Returns the integer square root of a number.
#[must_use]
fn isqrt(self) -> Self;
/// Checked integer square root.
#[must_use]
fn checked_isqrt(self) -> Option<Self>;
/// Calculates the quotient of Euclidean division of `self` by `rhs`.
#[must_use]
fn div_euclid(self, rhs: Self) -> Self;
/// Calculates the least nonnegative remainder of `self (mod rhs)`.
#[must_use]
fn rem_euclid(self, rhs: Self) -> Self;
/// Returns the logarithm of the number with respect to an arbitrary base, rounded down.
#[must_use]
fn ilog(self, base: Self) -> u32;
/// Returns the base 2 logarithm of the number, rounded down.
#[must_use]
fn ilog2(self) -> u32;
/// Returns the base 10 logarithm of the number, rounded down.
#[must_use]
fn ilog10(self) -> u32;
/// Checked integer logarithm to base.
#[must_use]
fn checked_ilog(self, base: Self) -> Option<u32>;
/// Checked base 2 logarithm.
#[must_use]
fn checked_ilog2(self) -> Option<u32>;
/// Checked base 10 logarithm.
#[must_use]
fn checked_ilog10(self) -> Option<u32>;
}
macro_rules! impl_signed_integer {
($($t:ty, $u:ty);* $(;)*) => {
$(
impl SignedInt for $t {
type U = $u;
#[inline(always)]
fn checked_abs(self) -> Option<Self> {
Self::checked_abs(self)
}
#[inline(always)]
fn saturating_abs(self) -> Self {
Self::saturating_abs(self)
}
#[inline(always)]
fn wrapping_abs(self) -> Self {
Self::wrapping_abs(self)
}
#[inline(always)]
fn overflowing_abs(self) -> (Self, bool) {
Self::overflowing_abs(self)
}
#[inline(always)]
fn unsigned_abs(self) -> Self::U {
Self::unsigned_abs(self)
}
#[inline(always)]
fn checked_neg(self) -> Option<Self> {
Self::checked_neg(self)
}
#[inline(always)]
fn saturating_neg(self) -> Self {
Self::saturating_neg(self)
}
#[inline(always)]
fn wrapping_neg(self) -> Self {
Self::wrapping_neg(self)
}
#[inline(always)]
fn overflowing_neg(self) -> (Self, bool) {
Self::overflowing_neg(self)
}
#[inline(always)]
fn checked_add_unsigned(self, rhs: Self::U) -> Option<Self> {
Self::checked_add_unsigned(self, rhs)
}
#[inline(always)]
fn saturating_add_unsigned(self, rhs: Self::U) -> Self {
Self::saturating_add_unsigned(self, rhs)
}
#[inline(always)]
fn wrapping_add_unsigned(self, rhs: Self::U) -> Self {
Self::wrapping_add_unsigned(self, rhs)
}
#[inline(always)]
fn overflowing_add_unsigned(self, rhs: Self::U) -> (Self, bool) {
Self::overflowing_add_unsigned(self, rhs)
}
#[inline(always)]
fn checked_sub_unsigned(self, rhs: Self::U) -> Option<Self> {
Self::checked_sub_unsigned(self, rhs)
}
#[inline(always)]
fn saturating_sub_unsigned(self, rhs: Self::U) -> Self {
Self::saturating_sub_unsigned(self, rhs)
}
#[inline(always)]
fn wrapping_sub_unsigned(self, rhs: Self::U) -> Self {
Self::wrapping_sub_unsigned(self, rhs)
}
#[inline(always)]
fn overflowing_sub_unsigned(self, rhs: Self::U) -> (Self, bool) {
Self::overflowing_sub_unsigned(self, rhs)
}
#[inline(always)]
fn cast_unsigned(self) -> Self::U {
Self::cast_unsigned(self)
}
#[inline(always)]
fn signum(self) -> Self {
Self::signum(self)
}
#[inline(always)]
fn isqrt(self) -> Self {
Self::isqrt(self)
}
#[inline(always)]
fn checked_isqrt(self) -> Option<Self> {
Self::checked_isqrt(self)
}
#[inline(always)]
fn div_euclid(self, rhs: Self) -> Self {
Self::div_euclid(self, rhs)
}
#[inline(always)]
fn rem_euclid(self, rhs: Self) -> Self {
Self::rem_euclid(self, rhs)
}
#[inline(always)]
fn ilog(self, base: Self) -> u32 {
Self::ilog(self, base)
}
#[inline(always)]
fn ilog2(self) -> u32 {
Self::ilog2(self)
}
#[inline(always)]
fn ilog10(self) -> u32 {
Self::ilog10(self)
}
#[inline(always)]
fn checked_ilog(self, base: Self) -> Option<u32> {
Self::checked_ilog(self, base)
}
#[inline(always)]
fn checked_ilog2(self) -> Option<u32> {
Self::checked_ilog2(self)
}
#[inline(always)]
fn checked_ilog10(self) -> Option<u32> {
Self::checked_ilog10(self)
}
}
)*
};
}
impl_signed_integer!(
i8, u8;
i16, u16;
i32, u32;
i64, u64;
i128, u128;
isize, usize;
);