int_macros.rs

macro_rules! int_impl {
    ($SelfT:ty, $ActualT:ident, $UnsignedT:ty, $BITS:expr, $Min:expr, $Max:expr,
     $rot:expr, $rot_op:expr, $rot_result:expr, $swap_op:expr, $swapped:expr,
     $reversed:expr, $le_bytes:expr, $be_bytes:expr,
     $to_xe_bytes_doc:expr, $from_xe_bytes_doc:expr) => {
        /// The smallest value that can be represented by this integer type.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN, ", stringify!($Min), ");")]
        /// ```
        #[stable(feature = "assoc_int_consts", since = "1.43.0")]
        pub const MIN: Self = !0 ^ ((!0 as $UnsignedT) >> 1) as Self;

        /// The largest value that can be represented by this integer type.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX, ", stringify!($Max), ");")]
        /// ```
        #[stable(feature = "assoc_int_consts", since = "1.43.0")]
        pub const MAX: Self = !Self::MIN;

        /// The size of this integer type in bits.
        ///
        /// # Examples
        ///
        /// ```
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::BITS, ", stringify!($BITS), ");")]
        /// ```
        #[stable(feature = "int_bits_const", since = "1.51.0")]
        pub const BITS: u32 = $BITS;

        /// Converts a string slice in a given base to an integer.
        ///
        /// The string is expected to be an optional `+` or `-` sign followed by digits.
        /// Leading and trailing whitespace represent an error. Digits are a subset of these characters,
        /// depending on `radix`:
        ///
        ///  * `0-9`
        ///  * `a-z`
        ///  * `A-Z`
        ///
        /// # Panics
        ///
        /// This function panics if `radix` is not in the range from 2 to 36.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::from_str_radix(\"A\", 16), Ok(10));")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        pub fn from_str_radix(src: &str, radix: u32) -> Result<Self, ParseIntError> {
            from_str_radix(src, radix)
        }

        /// Returns the number of ones in the binary representation of `self`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = 0b100_0000", stringify!($SelfT), ";")]
        ///
        /// assert_eq!(n.count_ones(), 1);
        /// ```
        ///
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[doc(alias = "popcount")]
        #[doc(alias = "popcnt")]
        #[inline]
        pub const fn count_ones(self) -> u32 { (self as $UnsignedT).count_ones() }

        /// Returns the number of zeros in the binary representation of `self`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.count_zeros(), 1);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        pub const fn count_zeros(self) -> u32 {
            (!self).count_ones()
        }

        /// Returns the number of leading zeros in the binary representation of `self`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = -1", stringify!($SelfT), ";")]
        ///
        /// assert_eq!(n.leading_zeros(), 0);
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        pub const fn leading_zeros(self) -> u32 {
            (self as $UnsignedT).leading_zeros()
        }

        /// Returns the number of trailing zeros in the binary representation of `self`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = -4", stringify!($SelfT), ";")]
        ///
        /// assert_eq!(n.trailing_zeros(), 2);
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        pub const fn trailing_zeros(self) -> u32 {
            (self as $UnsignedT).trailing_zeros()
        }

        /// Returns the number of leading ones in the binary representation of `self`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = -1", stringify!($SelfT), ";")]
        ///
        #[doc = concat!("assert_eq!(n.leading_ones(), ", stringify!($BITS), ");")]
        /// ```
        #[stable(feature = "leading_trailing_ones", since = "1.46.0")]
        #[rustc_const_stable(feature = "leading_trailing_ones", since = "1.46.0")]
        #[inline]
        pub const fn leading_ones(self) -> u32 {
            (self as $UnsignedT).leading_ones()
        }

        /// Returns the number of trailing ones in the binary representation of `self`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = 3", stringify!($SelfT), ";")]
        ///
        /// assert_eq!(n.trailing_ones(), 2);
        /// ```
        #[stable(feature = "leading_trailing_ones", since = "1.46.0")]
        #[rustc_const_stable(feature = "leading_trailing_ones", since = "1.46.0")]
        #[inline]
        pub const fn trailing_ones(self) -> u32 {
            (self as $UnsignedT).trailing_ones()
        }

        /// Shifts the bits to the left by a specified amount, `n`,
        /// wrapping the truncated bits to the end of the resulting integer.
        ///
        /// Please note this isn't the same operation as the `<<` shifting operator!
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = ", $rot_op, stringify!($SelfT), ";")]
        #[doc = concat!("let m = ", $rot_result, ";")]
        ///
        #[doc = concat!("assert_eq!(n.rotate_left(", $rot, "), m);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn rotate_left(self, n: u32) -> Self {
            (self as $UnsignedT).rotate_left(n) as Self
        }

        /// Shifts the bits to the right by a specified amount, `n`,
        /// wrapping the truncated bits to the beginning of the resulting
        /// integer.
        ///
        /// Please note this isn't the same operation as the `>>` shifting operator!
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = ", $rot_result, stringify!($SelfT), ";")]
        #[doc = concat!("let m = ", $rot_op, ";")]
        ///
        #[doc = concat!("assert_eq!(n.rotate_right(", $rot, "), m);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn rotate_right(self, n: u32) -> Self {
            (self as $UnsignedT).rotate_right(n) as Self
        }

        /// Reverses the byte order of the integer.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = ", $swap_op, stringify!($SelfT), ";")]
        ///
        /// let m = n.swap_bytes();
        ///
        #[doc = concat!("assert_eq!(m, ", $swapped, ");")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        pub const fn swap_bytes(self) -> Self {
            (self as $UnsignedT).swap_bytes() as Self
        }

        /// Reverses the order of bits in the integer. The least significant bit becomes the most significant bit,
        ///                 second least-significant bit becomes second most-significant bit, etc.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = ", $swap_op, stringify!($SelfT), ";")]
        /// let m = n.reverse_bits();
        ///
        #[doc = concat!("assert_eq!(m, ", $reversed, ");")]
        #[doc = concat!("assert_eq!(0, 0", stringify!($SelfT), ".reverse_bits());")]
        /// ```
        #[stable(feature = "reverse_bits", since = "1.37.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        #[must_use]
        pub const fn reverse_bits(self) -> Self {
            (self as $UnsignedT).reverse_bits() as Self
        }

        /// Converts an integer from big endian to the target's endianness.
        ///
        /// On big endian this is a no-op. On little endian the bytes are swapped.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = 0x1A", stringify!($SelfT), ";")]
        ///
        /// if cfg!(target_endian = "big") {
        #[doc = concat!("    assert_eq!(", stringify!($SelfT), "::from_be(n), n)")]
        /// } else {
        #[doc = concat!("    assert_eq!(", stringify!($SelfT), "::from_be(n), n.swap_bytes())")]
        /// }
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_conversions", since = "1.32.0")]
        #[inline]
        pub const fn from_be(x: Self) -> Self {
            #[cfg(target_endian = "big")]
            {
                x
            }
            #[cfg(not(target_endian = "big"))]
            {
                x.swap_bytes()
            }
        }

        /// Converts an integer from little endian to the target's endianness.
        ///
        /// On little endian this is a no-op. On big endian the bytes are swapped.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = 0x1A", stringify!($SelfT), ";")]
        ///
        /// if cfg!(target_endian = "little") {
        #[doc = concat!("    assert_eq!(", stringify!($SelfT), "::from_le(n), n)")]
        /// } else {
        #[doc = concat!("    assert_eq!(", stringify!($SelfT), "::from_le(n), n.swap_bytes())")]
        /// }
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_conversions", since = "1.32.0")]
        #[inline]
        pub const fn from_le(x: Self) -> Self {
            #[cfg(target_endian = "little")]
            {
                x
            }
            #[cfg(not(target_endian = "little"))]
            {
                x.swap_bytes()
            }
        }

        /// Converts `self` to big endian from the target's endianness.
        ///
        /// On big endian this is a no-op. On little endian the bytes are swapped.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = 0x1A", stringify!($SelfT), ";")]
        ///
        /// if cfg!(target_endian = "big") {
        ///     assert_eq!(n.to_be(), n)
        /// } else {
        ///     assert_eq!(n.to_be(), n.swap_bytes())
        /// }
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_conversions", since = "1.32.0")]
        #[inline]
        pub const fn to_be(self) -> Self { // or not to be?
            #[cfg(target_endian = "big")]
            {
                self
            }
            #[cfg(not(target_endian = "big"))]
            {
                self.swap_bytes()
            }
        }

        /// Converts `self` to little endian from the target's endianness.
        ///
        /// On little endian this is a no-op. On big endian the bytes are swapped.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let n = 0x1A", stringify!($SelfT), ";")]
        ///
        /// if cfg!(target_endian = "little") {
        ///     assert_eq!(n.to_le(), n)
        /// } else {
        ///     assert_eq!(n.to_le(), n.swap_bytes())
        /// }
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_conversions", since = "1.32.0")]
        #[inline]
        pub const fn to_le(self) -> Self {
            #[cfg(target_endian = "little")]
            {
                self
            }
            #[cfg(not(target_endian = "little"))]
            {
                self.swap_bytes()
            }
        }

        /// Checked integer addition. Computes `self + rhs`, returning `None`
        /// if overflow occurred.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!((", stringify!($SelfT), "::MAX - 2).checked_add(1), Some(", stringify!($SelfT), "::MAX - 1));")]
        #[doc = concat!("assert_eq!((", stringify!($SelfT), "::MAX - 2).checked_add(3), None);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.47.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_add(self, rhs: Self) -> Option<Self> {
            let (a, b) = self.overflowing_add(rhs);
            if unlikely!(b) {None} else {Some(a)}
        }

        /// Unchecked integer addition. Computes `self + rhs`, assuming overflow
        /// cannot occur. This results in undefined behavior when
        #[doc = concat!("`self + rhs > ", stringify!($SelfT), "::MAX` or `self + rhs < ", stringify!($SelfT), "::MIN`.")]
        #[unstable(
            feature = "unchecked_math",
            reason = "niche optimization path",
            issue = "none",
        )]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub unsafe fn unchecked_add(self, rhs: Self) -> Self {
            // SAFETY: the caller must uphold the safety contract for
            // `unchecked_add`.
            unsafe { intrinsics::unchecked_add(self, rhs) }
        }

        /// Checked integer subtraction. Computes `self - rhs`, returning `None` if
        /// overflow occurred.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!((", stringify!($SelfT), "::MIN + 2).checked_sub(1), Some(", stringify!($SelfT), "::MIN + 1));")]
        #[doc = concat!("assert_eq!((", stringify!($SelfT), "::MIN + 2).checked_sub(3), None);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.47.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_sub(self, rhs: Self) -> Option<Self> {
            let (a, b) = self.overflowing_sub(rhs);
            if unlikely!(b) {None} else {Some(a)}
        }

        /// Unchecked integer subtraction. Computes `self - rhs`, assuming overflow
        /// cannot occur. This results in undefined behavior when
        #[doc = concat!("`self - rhs > ", stringify!($SelfT), "::MAX` or `self - rhs < ", stringify!($SelfT), "::MIN`.")]
        #[unstable(
            feature = "unchecked_math",
            reason = "niche optimization path",
            issue = "none",
        )]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub unsafe fn unchecked_sub(self, rhs: Self) -> Self {
            // SAFETY: the caller must uphold the safety contract for
            // `unchecked_sub`.
            unsafe { intrinsics::unchecked_sub(self, rhs) }
        }

        /// Checked integer multiplication. Computes `self * rhs`, returning `None` if
        /// overflow occurred.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.checked_mul(1), Some(", stringify!($SelfT), "::MAX));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.checked_mul(2), None);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.47.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_mul(self, rhs: Self) -> Option<Self> {
            let (a, b) = self.overflowing_mul(rhs);
            if unlikely!(b) {None} else {Some(a)}
        }

        /// Unchecked integer multiplication. Computes `self * rhs`, assuming overflow
        /// cannot occur. This results in undefined behavior when
        #[doc = concat!("`self * rhs > ", stringify!($SelfT), "::MAX` or `self * rhs < ", stringify!($SelfT), "::MIN`.")]
        #[unstable(
            feature = "unchecked_math",
            reason = "niche optimization path",
            issue = "none",
        )]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub unsafe fn unchecked_mul(self, rhs: Self) -> Self {
            // SAFETY: the caller must uphold the safety contract for
            // `unchecked_mul`.
            unsafe { intrinsics::unchecked_mul(self, rhs) }
        }

        /// Checked integer division. Computes `self / rhs`, returning `None` if `rhs == 0`
        /// or the division results in overflow.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!((", stringify!($SelfT), "::MIN + 1).checked_div(-1), Some(", stringify!($Max), "));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.checked_div(-1), None);")]
        #[doc = concat!("assert_eq!((1", stringify!($SelfT), ").checked_div(0), None);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_unstable(feature = "const_checked_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_div(self, rhs: Self) -> Option<Self> {
            if unlikely!(rhs == 0 || (self == Self::MIN && rhs == -1)) {
                None
            } else {
                // SAFETY: div by zero and by INT_MIN have been checked above
                Some(unsafe { intrinsics::unchecked_div(self, rhs) })
            }
        }

        /// Checked Euclidean division. Computes `self.div_euclid(rhs)`,
        /// returning `None` if `rhs == 0` or the division results in overflow.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!((", stringify!($SelfT), "::MIN + 1).checked_div_euclid(-1), Some(", stringify!($Max), "));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.checked_div_euclid(-1), None);")]
        #[doc = concat!("assert_eq!((1", stringify!($SelfT), ").checked_div_euclid(0), None);")]
        /// ```
        #[stable(feature = "euclidean_division", since = "1.38.0")]
        #[rustc_const_unstable(feature = "const_euclidean_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_div_euclid(self, rhs: Self) -> Option<Self> {
            if unlikely!(rhs == 0 || (self == Self::MIN && rhs == -1)) {
                None
            } else {
                Some(self.div_euclid(rhs))
            }
        }

        /// Checked integer remainder. Computes `self % rhs`, returning `None` if
        /// `rhs == 0` or the division results in overflow.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".checked_rem(2), Some(1));")]
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".checked_rem(0), None);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.checked_rem(-1), None);")]
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_unstable(feature = "const_checked_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_rem(self, rhs: Self) -> Option<Self> {
            if unlikely!(rhs == 0 || (self == Self::MIN && rhs == -1)) {
                None
            } else {
                // SAFETY: div by zero and by INT_MIN have been checked above
                Some(unsafe { intrinsics::unchecked_rem(self, rhs) })
            }
        }

        /// Checked Euclidean remainder. Computes `self.rem_euclid(rhs)`, returning `None`
        /// if `rhs == 0` or the division results in overflow.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".checked_rem_euclid(2), Some(1));")]
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".checked_rem_euclid(0), None);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.checked_rem_euclid(-1), None);")]
        /// ```
        #[stable(feature = "euclidean_division", since = "1.38.0")]
        #[rustc_const_unstable(feature = "const_euclidean_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_rem_euclid(self, rhs: Self) -> Option<Self> {
            if unlikely!(rhs == 0 || (self == Self::MIN && rhs == -1)) {
                None
            } else {
                Some(self.rem_euclid(rhs))
            }
        }

        /// Checked negation. Computes `-self`, returning `None` if `self == MIN`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".checked_neg(), Some(-5));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.checked_neg(), None);")]
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.47.0")]
        #[inline]
        pub const fn checked_neg(self) -> Option<Self> {
            let (a, b) = self.overflowing_neg();
            if unlikely!(b) {None} else {Some(a)}
        }

        /// Checked shift left. Computes `self << rhs`, returning `None` if `rhs` is larger
        /// than or equal to the number of bits in `self`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(0x1", stringify!($SelfT), ".checked_shl(4), Some(0x10));")]
        #[doc = concat!("assert_eq!(0x1", stringify!($SelfT), ".checked_shl(129), None);")]
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.47.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_shl(self, rhs: u32) -> Option<Self> {
            let (a, b) = self.overflowing_shl(rhs);
            if unlikely!(b) {None} else {Some(a)}
        }

        /// Checked shift right. Computes `self >> rhs`, returning `None` if `rhs` is
        /// larger than or equal to the number of bits in `self`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(0x10", stringify!($SelfT), ".checked_shr(4), Some(0x1));")]
        #[doc = concat!("assert_eq!(0x10", stringify!($SelfT), ".checked_shr(128), None);")]
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.47.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_shr(self, rhs: u32) -> Option<Self> {
            let (a, b) = self.overflowing_shr(rhs);
            if unlikely!(b) {None} else {Some(a)}
        }

        /// Checked absolute value. Computes `self.abs()`, returning `None` if
        /// `self == MIN`.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!((-5", stringify!($SelfT), ").checked_abs(), Some(5));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.checked_abs(), None);")]
        /// ```
        #[stable(feature = "no_panic_abs", since = "1.13.0")]
        #[rustc_const_stable(feature = "const_checked_int_methods", since = "1.47.0")]
        #[inline]
        pub const fn checked_abs(self) -> Option<Self> {
            if self.is_negative() {
                self.checked_neg()
            } else {
                Some(self)
            }
        }

        /// Checked exponentiation. Computes `self.pow(exp)`, returning `None` if
        /// overflow occurred.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(8", stringify!($SelfT), ".checked_pow(2), Some(64));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.checked_pow(2), None);")]
        /// ```

        #[stable(feature = "no_panic_pow", since = "1.34.0")]
        #[rustc_const_stable(feature = "const_int_pow", since = "1.50.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn checked_pow(self, mut exp: u32) -> Option<Self> {
            if exp == 0 {
                return Some(1);
            }
            let mut base = self;
            let mut acc: Self = 1;

            while exp > 1 {
                if (exp & 1) == 1 {
                    acc = try_opt!(acc.checked_mul(base));
                }
                exp /= 2;
                base = try_opt!(base.checked_mul(base));
            }
            // since exp!=0, finally the exp must be 1.
            // Deal with the final bit of the exponent separately, since
            // squaring the base afterwards is not necessary and may cause a
            // needless overflow.
            Some(try_opt!(acc.checked_mul(base)))
        }

        /// Saturating integer addition. Computes `self + rhs`, saturating at the numeric
        /// bounds instead of overflowing.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".saturating_add(1), 101);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.saturating_add(100), ", stringify!($SelfT), "::MAX);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.saturating_add(-1), ", stringify!($SelfT), "::MIN);")]
        /// ```

        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_saturating_int_methods", since = "1.47.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn saturating_add(self, rhs: Self) -> Self {
            intrinsics::saturating_add(self, rhs)
        }

        /// Saturating integer subtraction. Computes `self - rhs`, saturating at the
        /// numeric bounds instead of overflowing.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".saturating_sub(127), -27);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.saturating_sub(100), ", stringify!($SelfT), "::MIN);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.saturating_sub(-1), ", stringify!($SelfT), "::MAX);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_saturating_int_methods", since = "1.47.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn saturating_sub(self, rhs: Self) -> Self {
            intrinsics::saturating_sub(self, rhs)
        }

        /// Saturating integer negation. Computes `-self`, returning `MAX` if `self == MIN`
        /// instead of overflowing.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".saturating_neg(), -100);")]
        #[doc = concat!("assert_eq!((-100", stringify!($SelfT), ").saturating_neg(), 100);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.saturating_neg(), ", stringify!($SelfT), "::MAX);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.saturating_neg(), ", stringify!($SelfT), "::MIN + 1);")]
        /// ```

        #[stable(feature = "saturating_neg", since = "1.45.0")]
        #[rustc_const_stable(feature = "const_saturating_int_methods", since = "1.47.0")]
        #[inline]
        pub const fn saturating_neg(self) -> Self {
            intrinsics::saturating_sub(0, self)
        }

        /// Saturating absolute value. Computes `self.abs()`, returning `MAX` if `self ==
        /// MIN` instead of overflowing.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".saturating_abs(), 100);")]
        #[doc = concat!("assert_eq!((-100", stringify!($SelfT), ").saturating_abs(), 100);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.saturating_abs(), ", stringify!($SelfT), "::MAX);")]
        #[doc = concat!("assert_eq!((", stringify!($SelfT), "::MIN + 1).saturating_abs(), ", stringify!($SelfT), "::MAX);")]
        /// ```

        #[stable(feature = "saturating_neg", since = "1.45.0")]
        #[rustc_const_stable(feature = "const_saturating_int_methods", since = "1.47.0")]
        #[inline]
        pub const fn saturating_abs(self) -> Self {
            if self.is_negative() {
                self.saturating_neg()
            } else {
                self
            }
        }

        /// Saturating integer multiplication. Computes `self * rhs`, saturating at the
        /// numeric bounds instead of overflowing.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!(10", stringify!($SelfT), ".saturating_mul(12), 120);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.saturating_mul(10), ", stringify!($SelfT), "::MAX);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.saturating_mul(10), ", stringify!($SelfT), "::MIN);")]
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_saturating_int_methods", since = "1.47.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn saturating_mul(self, rhs: Self) -> Self {
            match self.checked_mul(rhs) {
                Some(x) => x,
                None => if (self < 0) == (rhs < 0) {
                    Self::MAX
                } else {
                    Self::MIN
                }
            }
        }

        /// Saturating integer exponentiation. Computes `self.pow(exp)`,
        /// saturating at the numeric bounds instead of overflowing.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!((-4", stringify!($SelfT), ").saturating_pow(3), -64);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.saturating_pow(2), ", stringify!($SelfT), "::MAX);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.saturating_pow(3), ", stringify!($SelfT), "::MIN);")]
        /// ```
        #[stable(feature = "no_panic_pow", since = "1.34.0")]
        #[rustc_const_stable(feature = "const_int_pow", since = "1.50.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn saturating_pow(self, exp: u32) -> Self {
            match self.checked_pow(exp) {
                Some(x) => x,
                None if self < 0 && exp % 2 == 1 => Self::MIN,
                None => Self::MAX,
            }
        }

        /// Wrapping (modular) addition. Computes `self + rhs`, wrapping around at the
        /// boundary of the type.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".wrapping_add(27), 127);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.wrapping_add(2), ", stringify!($SelfT), "::MIN + 1);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_add(self, rhs: Self) -> Self {
            intrinsics::wrapping_add(self, rhs)
        }

        /// Wrapping (modular) subtraction. Computes `self - rhs`, wrapping around at the
        /// boundary of the type.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(0", stringify!($SelfT), ".wrapping_sub(127), -127);")]
        #[doc = concat!("assert_eq!((-2", stringify!($SelfT), ").wrapping_sub(", stringify!($SelfT), "::MAX), ", stringify!($SelfT), "::MAX);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_sub(self, rhs: Self) -> Self {
            intrinsics::wrapping_sub(self, rhs)
        }

        /// Wrapping (modular) multiplication. Computes `self * rhs`, wrapping around at
        /// the boundary of the type.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(10", stringify!($SelfT), ".wrapping_mul(12), 120);")]
        /// assert_eq!(11i8.wrapping_mul(12), -124);
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_mul(self, rhs: Self) -> Self {
            intrinsics::wrapping_mul(self, rhs)
        }

        /// Wrapping (modular) division. Computes `self / rhs`, wrapping around at the
        /// boundary of the type.
        ///
        /// The only case where such wrapping can occur is when one divides `MIN / -1` on a signed type (where
        /// `MIN` is the negative minimal value for the type); this is equivalent to `-MIN`, a positive value
        /// that is too large to represent in the type. In such a case, this function returns `MIN` itself.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".wrapping_div(10), 10);")]
        /// assert_eq!((-128i8).wrapping_div(-1), -128);
        /// ```
        #[stable(feature = "num_wrapping", since = "1.2.0")]
        #[rustc_const_unstable(feature = "const_wrapping_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_div(self, rhs: Self) -> Self {
            self.overflowing_div(rhs).0
        }

        /// Wrapping Euclidean division. Computes `self.div_euclid(rhs)`,
        /// wrapping around at the boundary of the type.
        ///
        /// Wrapping will only occur in `MIN / -1` on a signed type (where `MIN` is the negative minimal value
        /// for the type). This is equivalent to `-MIN`, a positive value that is too large to represent in the
        /// type. In this case, this method returns `MIN` itself.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".wrapping_div_euclid(10), 10);")]
        /// assert_eq!((-128i8).wrapping_div_euclid(-1), -128);
        /// ```
        #[stable(feature = "euclidean_division", since = "1.38.0")]
        #[rustc_const_unstable(feature = "const_euclidean_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_div_euclid(self, rhs: Self) -> Self {
            self.overflowing_div_euclid(rhs).0
        }

        /// Wrapping (modular) remainder. Computes `self % rhs`, wrapping around at the
        /// boundary of the type.
        ///
        /// Such wrap-around never actually occurs mathematically; implementation artifacts make `x % y`
        /// invalid for `MIN / -1` on a signed type (where `MIN` is the negative minimal value). In such a case,
        /// this function returns `0`.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".wrapping_rem(10), 0);")]
        /// assert_eq!((-128i8).wrapping_rem(-1), 0);
        /// ```
        #[stable(feature = "num_wrapping", since = "1.2.0")]
        #[rustc_const_unstable(feature = "const_wrapping_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_rem(self, rhs: Self) -> Self {
            self.overflowing_rem(rhs).0
        }

        /// Wrapping Euclidean remainder. Computes `self.rem_euclid(rhs)`, wrapping around
        /// at the boundary of the type.
        ///
        /// Wrapping will only occur in `MIN % -1` on a signed type (where `MIN` is the negative minimal value
        /// for the type). In this case, this method returns 0.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".wrapping_rem_euclid(10), 0);")]
        /// assert_eq!((-128i8).wrapping_rem_euclid(-1), 0);
        /// ```
        #[stable(feature = "euclidean_division", since = "1.38.0")]
        #[rustc_const_unstable(feature = "const_euclidean_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_rem_euclid(self, rhs: Self) -> Self {
            self.overflowing_rem_euclid(rhs).0
        }

        /// Wrapping (modular) negation. Computes `-self`, wrapping around at the boundary
        /// of the type.
        ///
        /// The only case where such wrapping can occur is when one negates `MIN` on a signed type (where `MIN`
        /// is the negative minimal value for the type); this is a positive value that is too large to represent
        /// in the type. In such a case, this function returns `MIN` itself.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".wrapping_neg(), -100);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.wrapping_neg(), ", stringify!($SelfT), "::MIN);")]
        /// ```
        #[stable(feature = "num_wrapping", since = "1.2.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        pub const fn wrapping_neg(self) -> Self {
            self.overflowing_neg().0
        }

        /// Panic-free bitwise shift-left; yields `self << mask(rhs)`, where `mask` removes
        /// any high-order bits of `rhs` that would cause the shift to exceed the bitwidth of the type.
        ///
        /// Note that this is *not* the same as a rotate-left; the RHS of a wrapping shift-left is restricted to
        /// the range of the type, rather than the bits shifted out of the LHS being returned to the other end.
        /// The primitive integer types all implement a [`rotate_left`](#method.rotate_left) function,
        /// which may be what you want instead.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!((-1", stringify!($SelfT), ").wrapping_shl(7), -128);")]
        #[doc = concat!("assert_eq!((-1", stringify!($SelfT), ").wrapping_shl(128), -1);")]
        /// ```
        #[stable(feature = "num_wrapping", since = "1.2.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_shl(self, rhs: u32) -> Self {
            // SAFETY: the masking by the bitsize of the type ensures that we do not shift
            // out of bounds
            unsafe {
                intrinsics::unchecked_shl(self, (rhs & ($BITS - 1)) as $SelfT)
            }
        }

        /// Panic-free bitwise shift-right; yields `self >> mask(rhs)`, where `mask`
        /// removes any high-order bits of `rhs` that would cause the shift to exceed the bitwidth of the type.
        ///
        /// Note that this is *not* the same as a rotate-right; the RHS of a wrapping shift-right is restricted
        /// to the range of the type, rather than the bits shifted out of the LHS being returned to the other
        /// end. The primitive integer types all implement a [`rotate_right`](#method.rotate_right) function,
        /// which may be what you want instead.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!((-128", stringify!($SelfT), ").wrapping_shr(7), -1);")]
        /// assert_eq!((-128i16).wrapping_shr(64), -128);
        /// ```
        #[stable(feature = "num_wrapping", since = "1.2.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_shr(self, rhs: u32) -> Self {
            // SAFETY: the masking by the bitsize of the type ensures that we do not shift
            // out of bounds
            unsafe {
                intrinsics::unchecked_shr(self, (rhs & ($BITS - 1)) as $SelfT)
            }
        }

        /// Wrapping (modular) absolute value. Computes `self.abs()`, wrapping around at
        /// the boundary of the type.
        ///
        /// The only case where such wrapping can occur is when one takes the absolute value of the negative
        /// minimal value for the type; this is a positive value that is too large to represent in the type. In
        /// such a case, this function returns `MIN` itself.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".wrapping_abs(), 100);")]
        #[doc = concat!("assert_eq!((-100", stringify!($SelfT), ").wrapping_abs(), 100);")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.wrapping_abs(), ", stringify!($SelfT), "::MIN);")]
        /// assert_eq!((-128i8).wrapping_abs() as u8, 128);
        /// ```
        #[stable(feature = "no_panic_abs", since = "1.13.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[allow(unused_attributes)]
        #[inline]
        pub const fn wrapping_abs(self) -> Self {
             if self.is_negative() {
                 self.wrapping_neg()
             } else {
                 self
             }
        }

        /// Computes the absolute value of `self` without any wrapping
        /// or panicking.
        ///
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(100", stringify!($SelfT), ".unsigned_abs(), 100", stringify!($UnsignedT), ");")]
        #[doc = concat!("assert_eq!((-100", stringify!($SelfT), ").unsigned_abs(), 100", stringify!($UnsignedT), ");")]
        /// assert_eq!((-128i8).unsigned_abs(), 128u8);
        /// ```
        #[stable(feature = "unsigned_abs", since = "1.51.0")]
        #[rustc_const_stable(feature = "unsigned_abs", since = "1.51.0")]
        #[inline]
        pub const fn unsigned_abs(self) -> $UnsignedT {
             self.wrapping_abs() as $UnsignedT
        }

        /// Wrapping (modular) exponentiation. Computes `self.pow(exp)`,
        /// wrapping around at the boundary of the type.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(3", stringify!($SelfT), ".wrapping_pow(4), 81);")]
        /// assert_eq!(3i8.wrapping_pow(5), -13);
        /// assert_eq!(3i8.wrapping_pow(6), -39);
        /// ```
        #[stable(feature = "no_panic_pow", since = "1.34.0")]
        #[rustc_const_stable(feature = "const_int_pow", since = "1.50.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn wrapping_pow(self, mut exp: u32) -> Self {
            if exp == 0 {
                return 1;
            }
            let mut base = self;
            let mut acc: Self = 1;

            while exp > 1 {
                if (exp & 1) == 1 {
                    acc = acc.wrapping_mul(base);
                }
                exp /= 2;
                base = base.wrapping_mul(base);
            }

            // since exp!=0, finally the exp must be 1.
            // Deal with the final bit of the exponent separately, since
            // squaring the base afterwards is not necessary and may cause a
            // needless overflow.
            acc.wrapping_mul(base)
        }

        /// Calculates `self` + `rhs`
        ///
        /// Returns a tuple of the addition along with a boolean indicating whether an arithmetic overflow would
        /// occur. If an overflow would have occurred then the wrapped value is returned.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".overflowing_add(2), (7, false));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MAX.overflowing_add(1), (", stringify!($SelfT), "::MIN, true));")]
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn overflowing_add(self, rhs: Self) -> (Self, bool) {
            let (a, b) = intrinsics::add_with_overflow(self as $ActualT, rhs as $ActualT);
            (a as Self, b)
        }

        /// Calculates `self` - `rhs`
        ///
        /// Returns a tuple of the subtraction along with a boolean indicating whether an arithmetic overflow
        /// would occur. If an overflow would have occurred then the wrapped value is returned.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".overflowing_sub(2), (3, false));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.overflowing_sub(1), (", stringify!($SelfT), "::MAX, true));")]
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn overflowing_sub(self, rhs: Self) -> (Self, bool) {
            let (a, b) = intrinsics::sub_with_overflow(self as $ActualT, rhs as $ActualT);
            (a as Self, b)
        }

        /// Calculates the multiplication of `self` and `rhs`.
        ///
        /// Returns a tuple of the multiplication along with a boolean indicating whether an arithmetic overflow
        /// would occur. If an overflow would have occurred then the wrapped value is returned.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".overflowing_mul(2), (10, false));")]
        /// assert_eq!(1_000_000_000i32.overflowing_mul(10), (1410065408, true));
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn overflowing_mul(self, rhs: Self) -> (Self, bool) {
            let (a, b) = intrinsics::mul_with_overflow(self as $ActualT, rhs as $ActualT);
            (a as Self, b)
        }

        /// Calculates the divisor when `self` is divided by `rhs`.
        ///
        /// Returns a tuple of the divisor along with a boolean indicating whether an arithmetic overflow would
        /// occur. If an overflow would occur then self is returned.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".overflowing_div(2), (2, false));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.overflowing_div(-1), (", stringify!($SelfT), "::MIN, true));")]
        /// ```
        #[inline]
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_unstable(feature = "const_overflowing_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        pub const fn overflowing_div(self, rhs: Self) -> (Self, bool) {
            if unlikely!(self == Self::MIN && rhs == -1) {
                (self, true)
            } else {
                (self / rhs, false)
            }
        }

        /// Calculates the quotient of Euclidean division `self.div_euclid(rhs)`.
        ///
        /// Returns a tuple of the divisor along with a boolean indicating whether an arithmetic overflow would
        /// occur. If an overflow would occur then `self` is returned.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".overflowing_div_euclid(2), (2, false));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.overflowing_div_euclid(-1), (", stringify!($SelfT), "::MIN, true));")]
        /// ```
        #[inline]
        #[stable(feature = "euclidean_division", since = "1.38.0")]
        #[rustc_const_unstable(feature = "const_euclidean_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        pub const fn overflowing_div_euclid(self, rhs: Self) -> (Self, bool) {
            if unlikely!(self == Self::MIN && rhs == -1) {
                (self, true)
            } else {
                (self.div_euclid(rhs), false)
            }
        }

        /// Calculates the remainder when `self` is divided by `rhs`.
        ///
        /// Returns a tuple of the remainder after dividing along with a boolean indicating whether an
        /// arithmetic overflow would occur. If an overflow would occur then 0 is returned.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        ///
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".overflowing_rem(2), (1, false));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.overflowing_rem(-1), (0, true));")]
        /// ```
        #[inline]
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_unstable(feature = "const_overflowing_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        pub const fn overflowing_rem(self, rhs: Self) -> (Self, bool) {
            if unlikely!(self == Self::MIN && rhs == -1) {
                (0, true)
            } else {
                (self % rhs, false)
            }
        }


        /// Overflowing Euclidean remainder. Calculates `self.rem_euclid(rhs)`.
        ///
        /// Returns a tuple of the remainder after dividing along with a boolean indicating whether an
        /// arithmetic overflow would occur. If an overflow would occur then 0 is returned.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(5", stringify!($SelfT), ".overflowing_rem_euclid(2), (1, false));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.overflowing_rem_euclid(-1), (0, true));")]
        /// ```
        #[stable(feature = "euclidean_division", since = "1.38.0")]
        #[rustc_const_unstable(feature = "const_euclidean_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn overflowing_rem_euclid(self, rhs: Self) -> (Self, bool) {
            if unlikely!(self == Self::MIN && rhs == -1) {
                (0, true)
            } else {
                (self.rem_euclid(rhs), false)
            }
        }


        /// Negates self, overflowing if this is equal to the minimum value.
        ///
        /// Returns a tuple of the negated version of self along with a boolean indicating whether an overflow
        /// happened. If `self` is the minimum value (e.g., `i32::MIN` for values of type `i32`), then the
        /// minimum value will be returned again and `true` will be returned for an overflow happening.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(2", stringify!($SelfT), ".overflowing_neg(), (-2, false));")]
        #[doc = concat!("assert_eq!(", stringify!($SelfT), "::MIN.overflowing_neg(), (", stringify!($SelfT), "::MIN, true));")]
        /// ```
        #[inline]
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[allow(unused_attributes)]
        pub const fn overflowing_neg(self) -> (Self, bool) {
            if unlikely!(self == Self::MIN) {
                (Self::MIN, true)
            } else {
                (-self, false)
            }
        }

        /// Shifts self left by `rhs` bits.
        ///
        /// Returns a tuple of the shifted version of self along with a boolean indicating whether the shift
        /// value was larger than or equal to the number of bits. If the shift value is too large, then value is
        /// masked (N-1) where N is the number of bits, and this value is then used to perform the shift.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(0x1", stringify!($SelfT),".overflowing_shl(4), (0x10, false));")]
        /// assert_eq!(0x1i32.overflowing_shl(36), (0x10, true));
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn overflowing_shl(self, rhs: u32) -> (Self, bool) {
            (self.wrapping_shl(rhs), (rhs > ($BITS - 1)))
        }

        /// Shifts self right by `rhs` bits.
        ///
        /// Returns a tuple of the shifted version of self along with a boolean indicating whether the shift
        /// value was larger than or equal to the number of bits. If the shift value is too large, then value is
        /// masked (N-1) where N is the number of bits, and this value is then used to perform the shift.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(0x10", stringify!($SelfT), ".overflowing_shr(4), (0x1, false));")]
        /// assert_eq!(0x10i32.overflowing_shr(36), (0x1, true));
        /// ```
        #[stable(feature = "wrapping", since = "1.7.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn overflowing_shr(self, rhs: u32) -> (Self, bool) {
            (self.wrapping_shr(rhs), (rhs > ($BITS - 1)))
        }

        /// Computes the absolute value of `self`.
        ///
        /// Returns a tuple of the absolute version of self along with a boolean indicating whether an overflow
        /// happened. If self is the minimum value
        #[doc = concat!("(e.g., ", stringify!($SelfT), "::MIN for values of type ", stringify!($SelfT), "),")]
        /// then the minimum value will be returned again and true will be returned
        /// for an overflow happening.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(10", stringify!($SelfT), ".overflowing_abs(), (10, false));")]
        #[doc = concat!("assert_eq!((-10", stringify!($SelfT), ").overflowing_abs(), (10, false));")]
        #[doc = concat!("assert_eq!((", stringify!($SelfT), "::MIN).overflowing_abs(), (", stringify!($SelfT), "::MIN, true));")]
        /// ```
        #[stable(feature = "no_panic_abs", since = "1.13.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        pub const fn overflowing_abs(self) -> (Self, bool) {
            (self.wrapping_abs(), self == Self::MIN)
        }

        /// Raises self to the power of `exp`, using exponentiation by squaring.
        ///
        /// Returns a tuple of the exponentiation along with a bool indicating
        /// whether an overflow happened.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(3", stringify!($SelfT), ".overflowing_pow(4), (81, false));")]
        /// assert_eq!(3i8.overflowing_pow(5), (-13, true));
        /// ```
        #[stable(feature = "no_panic_pow", since = "1.34.0")]
        #[rustc_const_stable(feature = "const_int_pow", since = "1.50.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        pub const fn overflowing_pow(self, mut exp: u32) -> (Self, bool) {
            if exp == 0 {
                return (1,false);
            }
            let mut base = self;
            let mut acc: Self = 1;
            let mut overflown = false;
            // Scratch space for storing results of overflowing_mul.
            let mut r;

            while exp > 1 {
                if (exp & 1) == 1 {
                    r = acc.overflowing_mul(base);
                    acc = r.0;
                    overflown |= r.1;
                }
                exp /= 2;
                r = base.overflowing_mul(base);
                base = r.0;
                overflown |= r.1;
            }

            // since exp!=0, finally the exp must be 1.
            // Deal with the final bit of the exponent separately, since
            // squaring the base afterwards is not necessary and may cause a
            // needless overflow.
            r = acc.overflowing_mul(base);
            r.1 |= overflown;
            r
        }

        /// Raises self to the power of `exp`, using exponentiation by squaring.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let x: ", stringify!($SelfT), " = 2; // or any other integer type")]
        ///
        /// assert_eq!(x.pow(5), 32);
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_pow", since = "1.50.0")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        #[rustc_inherit_overflow_checks]
        pub const fn pow(self, mut exp: u32) -> Self {
            if exp == 0 {
                return 1;
            }
            let mut base = self;
            let mut acc = 1;

            while exp > 1 {
                if (exp & 1) == 1 {
                    acc = acc * base;
                }
                exp /= 2;
                base = base * base;
            }

            // since exp!=0, finally the exp must be 1.
            // Deal with the final bit of the exponent separately, since
            // squaring the base afterwards is not necessary and may cause a
            // needless overflow.
            acc * base
        }

        /// Calculates the quotient of Euclidean division of `self` by `rhs`.
        ///
        /// This computes the integer `n` such that `self = n * rhs + self.rem_euclid(rhs)`,
        /// with `0 <= self.rem_euclid(rhs) < rhs`.
        ///
        /// In other words, the result is `self / rhs` rounded to the integer `n`
        /// such that `self >= n * rhs`.
        /// If `self > 0`, this is equal to round towards zero (the default in Rust);
        /// if `self < 0`, this is equal to round towards +/- infinity.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0 or the division results in overflow.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let a: ", stringify!($SelfT), " = 7; // or any other integer type")]
        /// let b = 4;
        ///
        /// assert_eq!(a.div_euclid(b), 1); // 7 >= 4 * 1
        /// assert_eq!(a.div_euclid(-b), -1); // 7 >= -4 * -1
        /// assert_eq!((-a).div_euclid(b), -2); // -7 >= 4 * -2
        /// assert_eq!((-a).div_euclid(-b), 2); // -7 >= -4 * 2
        /// ```
        #[stable(feature = "euclidean_division", since = "1.38.0")]
        #[rustc_const_unstable(feature = "const_euclidean_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        #[rustc_inherit_overflow_checks]
        pub const fn div_euclid(self, rhs: Self) -> Self {
            let q = self / rhs;
            if self % rhs < 0 {
                return if rhs > 0 { q - 1 } else { q + 1 }
            }
            q
        }


        /// Calculates the least nonnegative remainder of `self (mod rhs)`.
        ///
        /// This is done as if by the Euclidean division algorithm -- given
        /// `r = self.rem_euclid(rhs)`, `self = rhs * self.div_euclid(rhs) + r`, and
        /// `0 <= r < abs(rhs)`.
        ///
        /// # Panics
        ///
        /// This function will panic if `rhs` is 0 or the division results in overflow.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("let a: ", stringify!($SelfT), " = 7; // or any other integer type")]
        /// let b = 4;
        ///
        /// assert_eq!(a.rem_euclid(b), 3);
        /// assert_eq!((-a).rem_euclid(b), 1);
        /// assert_eq!(a.rem_euclid(-b), 3);
        /// assert_eq!((-a).rem_euclid(-b), 1);
        /// ```
        #[stable(feature = "euclidean_division", since = "1.38.0")]
        #[rustc_const_unstable(feature = "const_euclidean_int_methods", issue = "53718")]
        #[must_use = "this returns the result of the operation, \
                      without modifying the original"]
        #[inline]
        #[rustc_inherit_overflow_checks]
        pub const fn rem_euclid(self, rhs: Self) -> Self {
            let r = self % rhs;
            if r < 0 {
                if rhs < 0 {
                    r - rhs
                } else {
                    r + rhs
                }
            } else {
                r
            }
        }

        /// Computes the absolute value of `self`.
        ///
        /// # Overflow behavior
        ///
        /// The absolute value of
        #[doc = concat!("`", stringify!($SelfT), "::MIN`")]
        /// cannot be represented as an
        #[doc = concat!("`", stringify!($SelfT), "`,")]
        /// and attempting to calculate it will cause an overflow. This means
        /// that code in debug mode will trigger a panic on this case and
        /// optimized code will return
        #[doc = concat!("`", stringify!($SelfT), "::MIN`")]
        /// without a panic.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(10", stringify!($SelfT), ".abs(), 10);")]
        #[doc = concat!("assert_eq!((-10", stringify!($SelfT), ").abs(), 10);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[allow(unused_attributes)]
        #[inline]
        #[rustc_inherit_overflow_checks]
        pub const fn abs(self) -> Self {
            // Note that the #[inline] above means that the overflow
            // semantics of the subtraction depend on the crate we're being
            // inlined into.
            if self.is_negative() {
                -self
            } else {
                self
            }
        }

        /// Returns a number representing sign of `self`.
        ///
        ///  - `0` if the number is zero
        ///  - `1` if the number is positive
        ///  - `-1` if the number is negative
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert_eq!(10", stringify!($SelfT), ".signum(), 1);")]
        #[doc = concat!("assert_eq!(0", stringify!($SelfT), ".signum(), 0);")]
        #[doc = concat!("assert_eq!((-10", stringify!($SelfT), ").signum(), -1);")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_sign", since = "1.47.0")]
        #[inline]
        pub const fn signum(self) -> Self {
            match self {
                n if n > 0 =>  1,
                0          =>  0,
                _          => -1,
            }
        }

        /// Returns `true` if `self` is positive and `false` if the number is zero or
        /// negative.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert!(10", stringify!($SelfT), ".is_positive());")]
        #[doc = concat!("assert!(!(-10", stringify!($SelfT), ").is_positive());")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        pub const fn is_positive(self) -> bool { self > 0 }

        /// Returns `true` if `self` is negative and `false` if the number is zero or
        /// positive.
        ///
        /// # Examples
        ///
        /// Basic usage:
        ///
        /// ```
        #[doc = concat!("assert!((-10", stringify!($SelfT), ").is_negative());")]
        #[doc = concat!("assert!(!10", stringify!($SelfT), ".is_negative());")]
        /// ```
        #[stable(feature = "rust1", since = "1.0.0")]
        #[rustc_const_stable(feature = "const_int_methods", since = "1.32.0")]
        #[inline]
        pub const fn is_negative(self) -> bool { self < 0 }

        /// Return the memory representation of this integer as a byte array in
        /// big-endian (network) byte order.
        ///
        #[doc = $to_xe_bytes_doc]
        ///
        /// # Examples
        ///
        /// ```
        #[doc = concat!("let bytes = ", $swap_op, stringify!($SelfT), ".to_be_bytes();")]
        #[doc = concat!("assert_eq!(bytes, ", $be_bytes, ");")]
        /// ```
        #[stable(feature = "int_to_from_bytes", since = "1.32.0")]
        #[rustc_const_stable(feature = "const_int_conversion", since = "1.44.0")]
        #[inline]
        pub const fn to_be_bytes(self) -> [u8; mem::size_of::<Self>()] {
            self.to_be().to_ne_bytes()
        }

        /// Return the memory representation of this integer as a byte array in
        /// little-endian byte order.
        ///
        #[doc = $to_xe_bytes_doc]
        ///
        /// # Examples
        ///
        /// ```
        #[doc = concat!("let bytes = ", $swap_op, stringify!($SelfT), ".to_le_bytes();")]
        #[doc = concat!("assert_eq!(bytes, ", $le_bytes, ");")]
        /// ```
        #[stable(feature = "int_to_from_bytes", since = "1.32.0")]
        #[rustc_const_stable(feature = "const_int_conversion", since = "1.44.0")]
        #[inline]
        pub const fn to_le_bytes(self) -> [u8; mem::size_of::<Self>()] {
            self.to_le().to_ne_bytes()
        }

        /// Return the memory representation of this integer as a byte array in
        /// native byte order.
        ///
        /// As the target platform's native endianness is used, portable code
        /// should use [`to_be_bytes`] or [`to_le_bytes`], as appropriate,
        /// instead.
        ///
        #[doc = $to_xe_bytes_doc]
        ///
        /// [`to_be_bytes`]: #method.to_be_bytes
        /// [`to_le_bytes`]: #method.to_le_bytes
        ///
        /// # Examples
        ///
        /// ```
        #[doc = concat!("let bytes = ", $swap_op, stringify!($SelfT), ".to_ne_bytes();")]
        /// assert_eq!(
        ///     bytes,
        ///     if cfg!(target_endian = "big") {
        #[doc = concat!("        ", $be_bytes)]
        ///     } else {
        #[doc = concat!("        ", $le_bytes)]
        ///     }
        /// );
        /// ```
        #[stable(feature = "int_to_from_bytes", since = "1.32.0")]
        #[rustc_const_stable(feature = "const_int_conversion", since = "1.44.0")]
        // SAFETY: const sound because integers are plain old datatypes so we can always
        // transmute them to arrays of bytes
        #[rustc_allow_const_fn_unstable(const_fn_transmute)]
        #[inline]
        pub const fn to_ne_bytes(self) -> [u8; mem::size_of::<Self>()] {
            // SAFETY: integers are plain old datatypes so we can always transmute them to
            // arrays of bytes
            unsafe { mem::transmute(self) }
        }

        /// Return the memory representation of this integer as a byte array in
        /// native byte order.
        ///
        /// [`to_ne_bytes`] should be preferred over this whenever possible.
        ///
        /// [`to_ne_bytes`]: #method.to_ne_bytes
        ///
        /// # Examples
        ///
        /// ```
        /// #![feature(num_as_ne_bytes)]
        #[doc = concat!("let num = ", $swap_op, stringify!($SelfT), ";")]
        /// let bytes = num.as_ne_bytes();
        /// assert_eq!(
        ///     bytes,
        ///     if cfg!(target_endian = "big") {
        #[doc = concat!("        &", $be_bytes)]
        ///     } else {
        #[doc = concat!("        &", $le_bytes)]
        ///     }
        /// );
        /// ```
        #[unstable(feature = "num_as_ne_bytes", issue = "76976")]
        #[inline]
        pub fn as_ne_bytes(&self) -> &[u8; mem::size_of::<Self>()] {
            // SAFETY: integers are plain old datatypes so we can always transmute them to
            // arrays of bytes
            unsafe { &*(self as *const Self as *const _) }
        }

        /// Create an integer value from its representation as a byte array in
        /// big endian.
        ///
        #[doc = $to_xe_bytes_doc]
        ///
        /// # Examples
        ///
        /// ```
        #[doc = concat!("let value = ", stringify!($SelfT), "::from_be_bytes(", $be_bytes, ");")]
        #[doc = concat!("assert_eq!(value, ", $swap_op, ");")]
        /// ```
        ///
        /// When starting from a slice rather than an array, fallible conversion APIs can be used:
        ///
        /// ```
        /// use std::convert::TryInto;
        ///
        #[doc = concat!("fn read_be_", stringify!($SelfT), "(input: &mut &[u8]) -> ", stringify!($SelfT), " {")]
        #[doc = concat!("    let (int_bytes, rest) = input.split_at(std::mem::size_of::<", stringify!($SelfT), ">());")]
        ///     *input = rest;
        #[doc = concat!("    ", stringify!($SelfT), "::from_be_bytes(int_bytes.try_into().unwrap())")]
        /// }
        /// ```
        #[stable(feature = "int_to_from_bytes", since = "1.32.0")]
        #[rustc_const_stable(feature = "const_int_conversion", since = "1.44.0")]
        #[inline]
        pub const fn from_be_bytes(bytes: [u8; mem::size_of::<Self>()]) -> Self {
            Self::from_be(Self::from_ne_bytes(bytes))
        }

        /// Create an integer value from its representation as a byte array in
        /// little endian.
        ///
        #[doc = $to_xe_bytes_doc]
        ///
        /// # Examples
        ///
        /// ```
        #[doc = concat!("let value = ", stringify!($SelfT), "::from_le_bytes(", $le_bytes, ");")]
        #[doc = concat!("assert_eq!(value, ", $swap_op, ");")]
        /// ```
        ///
        /// When starting from a slice rather than an array, fallible conversion APIs can be used:
        ///
        /// ```
        /// use std::convert::TryInto;
        ///
        #[doc = concat!("fn read_le_", stringify!($SelfT), "(input: &mut &[u8]) -> ", stringify!($SelfT), " {")]
        #[doc = concat!("    let (int_bytes, rest) = input.split_at(std::mem::size_of::<", stringify!($SelfT), ">());")]
        ///     *input = rest;
        #[doc = concat!("    ", stringify!($SelfT), "::from_le_bytes(int_bytes.try_into().unwrap())")]
        /// }
        /// ```
        #[stable(feature = "int_to_from_bytes", since = "1.32.0")]
        #[rustc_const_stable(feature = "const_int_conversion", since = "1.44.0")]
        #[inline]
        pub const fn from_le_bytes(bytes: [u8; mem::size_of::<Self>()]) -> Self {
            Self::from_le(Self::from_ne_bytes(bytes))
        }

        /// Create an integer value from its memory representation as a byte
        /// array in native endianness.
        ///
        /// As the target platform's native endianness is used, portable code
        /// likely wants to use [`from_be_bytes`] or [`from_le_bytes`], as
        /// appropriate instead.
        ///
        /// [`from_be_bytes`]: #method.from_be_bytes
        /// [`from_le_bytes`]: #method.from_le_bytes
        ///
        #[doc = $to_xe_bytes_doc]
        ///
        /// # Examples
        ///
        /// ```
        #[doc = concat!("let value = ", stringify!($SelfT), "::from_ne_bytes(if cfg!(target_endian = \"big\") {")]
        #[doc = concat!("    ", $be_bytes)]
        /// } else {
        #[doc = concat!("    ", $le_bytes)]
        /// });
        #[doc = concat!("assert_eq!(value, ", $swap_op, ");")]
        /// ```
        ///
        /// When starting from a slice rather than an array, fallible conversion APIs can be used:
        ///
        /// ```
        /// use std::convert::TryInto;
        ///
        #[doc = concat!("fn read_ne_", stringify!($SelfT), "(input: &mut &[u8]) -> ", stringify!($SelfT), " {")]
        #[doc = concat!("    let (int_bytes, rest) = input.split_at(std::mem::size_of::<", stringify!($SelfT), ">());")]
        ///     *input = rest;
        #[doc = concat!("    ", stringify!($SelfT), "::from_ne_bytes(int_bytes.try_into().unwrap())")]
        /// }
        /// ```
        #[stable(feature = "int_to_from_bytes", since = "1.32.0")]
        #[rustc_const_stable(feature = "const_int_conversion", since = "1.44.0")]
        // SAFETY: const sound because integers are plain old datatypes so we can always
        // transmute to them
        #[rustc_allow_const_fn_unstable(const_fn_transmute)]
        #[inline]
        pub const fn from_ne_bytes(bytes: [u8; mem::size_of::<Self>()]) -> Self {
            // SAFETY: integers are plain old datatypes so we can always transmute to them
            unsafe { mem::transmute(bytes) }
        }

        /// New code should prefer to use
        #[doc = concat!("[`", stringify!($SelfT), "::MIN", "`](#associatedconstant.MIN).")]
        ///
        /// Returns the smallest value that can be represented by this integer type.
        #[stable(feature = "rust1", since = "1.0.0")]
        #[inline(always)]
        #[rustc_promotable]
        #[rustc_const_stable(feature = "const_min_value", since = "1.32.0")]
        #[rustc_deprecated(since = "TBD", reason = "replaced by the `MIN` associated constant on this type")]
        pub const fn min_value() -> Self {
            Self::MIN
        }

        /// New code should prefer to use
        #[doc = concat!("[`", stringify!($SelfT), "::MAX", "`](#associatedconstant.MAX).")]
        ///
        /// Returns the largest value that can be represented by this integer type.
        #[stable(feature = "rust1", since = "1.0.0")]
        #[inline(always)]
        #[rustc_promotable]
        #[rustc_const_stable(feature = "const_max_value", since = "1.32.0")]
        #[rustc_deprecated(since = "TBD", reason = "replaced by the `MAX` associated constant on this type")]
        pub const fn max_value() -> Self {
            Self::MAX
        }
    }
}