diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs index 229a864d712..9af8ef53851 100644 --- a/src/libcore/num/mod.rs +++ b/src/libcore/num/mod.rs @@ -149,7 +149,7 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// assert_eq!(u32::from_str_radix("A", 16), Ok(10)); + /// assert_eq!(i32::from_str_radix("A", 16), Ok(10)); /// ``` #[stable(feature = "rust1", since = "1.0.0")] pub fn from_str_radix(src: &str, radix: u32) -> Result { @@ -163,9 +163,9 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0b01001100u8; + /// let n = -0b1000_0000i8; /// - /// assert_eq!(n.count_ones(), 3); + /// assert_eq!(n.count_ones(), 1); /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] @@ -178,9 +178,9 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0b01001100u8; + /// let n = -0b1000_0000i8; /// - /// assert_eq!(n.count_zeros(), 5); + /// assert_eq!(n.count_zeros(), 7); /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] @@ -196,9 +196,9 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0b0101000u16; + /// let n = -1i16; /// - /// assert_eq!(n.leading_zeros(), 10); + /// assert_eq!(n.leading_zeros(), 0); /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] @@ -214,9 +214,9 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0b0101000u16; + /// let n = -4i8; /// - /// assert_eq!(n.trailing_zeros(), 3); + /// assert_eq!(n.trailing_zeros(), 2); /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] @@ -232,10 +232,10 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0x0123456789ABCDEFu64; - /// let m = 0x3456789ABCDEF012u64; + /// let n = 0x0123456789ABCDEFi64; + /// let m = -0x76543210FEDCBA99i64; /// - /// assert_eq!(n.rotate_left(12), m); + /// assert_eq!(n.rotate_left(32), m); /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] @@ -252,10 +252,10 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0x0123456789ABCDEFu64; - /// let m = 0xDEF0123456789ABCu64; + /// let n = 0x0123456789ABCDEFi64; + /// let m = -0xFEDCBA987654322i64; /// - /// assert_eq!(n.rotate_right(12), m); + /// assert_eq!(n.rotate_right(4), m); /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] @@ -270,8 +270,8 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0x0123456789ABCDEFu64; - /// let m = 0xEFCDAB8967452301u64; + /// let n = 0x0123456789ABCDEFi64; + /// let m = -0x1032547698BADCFFi64; /// /// assert_eq!(n.swap_bytes(), m); /// ``` @@ -291,12 +291,12 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0x0123456789ABCDEFu64; + /// let n = 0x0123456789ABCDEFi64; /// /// if cfg!(target_endian = "big") { - /// assert_eq!(u64::from_be(n), n) + /// assert_eq!(i64::from_be(n), n) /// } else { - /// assert_eq!(u64::from_be(n), n.swap_bytes()) + /// assert_eq!(i64::from_be(n), n.swap_bytes()) /// } /// ``` #[stable(feature = "rust1", since = "1.0.0")] @@ -315,12 +315,12 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0x0123456789ABCDEFu64; + /// let n = 0x0123456789ABCDEFi64; /// /// if cfg!(target_endian = "little") { - /// assert_eq!(u64::from_le(n), n) + /// assert_eq!(i64::from_le(n), n) /// } else { - /// assert_eq!(u64::from_le(n), n.swap_bytes()) + /// assert_eq!(i64::from_le(n), n.swap_bytes()) /// } /// ``` #[stable(feature = "rust1", since = "1.0.0")] @@ -339,7 +339,7 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0x0123456789ABCDEFu64; + /// let n = 0x0123456789ABCDEFi64; /// /// if cfg!(target_endian = "big") { /// assert_eq!(n.to_be(), n) @@ -363,7 +363,7 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// let n = 0x0123456789ABCDEFu64; + /// let n = 0x0123456789ABCDEFi64; /// /// if cfg!(target_endian = "little") { /// assert_eq!(n.to_le(), n) @@ -385,8 +385,8 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// assert_eq!(5u16.checked_add(65530), Some(65535)); - /// assert_eq!(6u16.checked_add(65530), None); + /// assert_eq!(7i16.checked_add(32760), Some(32767)); + /// assert_eq!(8i16.checked_add(32760), None); /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] @@ -421,8 +421,8 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// assert_eq!(5u8.checked_mul(51), Some(255)); - /// assert_eq!(5u8.checked_mul(52), None); + /// assert_eq!(6i8.checked_mul(21), Some(126)); + /// assert_eq!(6i8.checked_mul(22), None); /// ``` #[stable(feature = "rust1", since = "1.0.0")] #[inline] @@ -753,8 +753,8 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// assert_eq!(1u8.wrapping_shl(7), 128); - /// assert_eq!(1u8.wrapping_shl(8), 1); + /// assert_eq!((-1i8).wrapping_shl(7), -128); + /// assert_eq!((-1i8).wrapping_shl(8), -1); /// ``` #[stable(feature = "num_wrapping", since = "1.2.0")] #[inline(always)] @@ -778,8 +778,8 @@ macro_rules! int_impl { /// Basic usage: /// /// ``` - /// assert_eq!(128u8.wrapping_shr(7), 1); - /// assert_eq!(128u8.wrapping_shr(8), 128); + /// assert_eq!((-128i8).wrapping_shr(7), -1); + /// assert_eq!((-128i8).wrapping_shr(8), -128); /// ``` #[stable(feature = "num_wrapping", since = "1.2.0")] #[inline(always)] @@ -1193,15 +1193,13 @@ macro_rules! uint_impl { /// /// Leading and trailing whitespace represent an error. /// - /// # Arguments + /// # Examples /// - /// * src - A string slice - /// * radix - The base to use. Must lie in the range [2 .. 36] + /// Basic usage: /// - /// # Return value - /// - /// `Err(ParseIntError)` if the string did not represent a valid number. - /// Otherwise, `Ok(n)` where `n` is the integer represented by `src`. + /// ``` + /// assert_eq!(u32::from_str_radix("A", 16), Ok(10)); + /// ``` #[stable(feature = "rust1", since = "1.0.0")] pub fn from_str_radix(src: &str, radix: u32) -> Result { from_str_radix(src, radix) @@ -1745,7 +1743,7 @@ macro_rules! uint_impl { /// Basic usage: /// /// ``` - /// assert_eq!(100i8.wrapping_rem(10), 0); + /// assert_eq!(100u8.wrapping_rem(10), 0); /// ``` #[stable(feature = "num_wrapping", since = "1.2.0")] #[inline(always)] @@ -1783,6 +1781,13 @@ macro_rules! uint_impl { /// 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` function, which may + /// be what you want instead. + /// /// # Examples /// /// Basic usage: @@ -1801,6 +1806,13 @@ macro_rules! uint_impl { /// 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` function, which may + /// be what you want instead. + /// /// # Examples /// /// Basic usage: