1.0.0[−][src]Trait nom::lib::std::fmt::Octal
o
formatting.
The Octal
trait should format its output as a number in base-8.
For primitive signed integers (i8
to i128
, and isize
),
negative values are formatted as the two’s complement representation.
The alternate flag, #
, adds a 0o
in front of the output.
For more information on formatters, see the module-level documentation.
Examples
Basic usage with i32
:
let x = 42; // 42 is '52' in octal assert_eq!(format!("{:o}", x), "52"); assert_eq!(format!("{:#o}", x), "0o52"); assert_eq!(format!("{:o}", -16), "37777777760");
Implementing Octal
on a type:
use std::fmt; struct Length(i32); impl fmt::Octal for Length { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { let val = self.0; fmt::Octal::fmt(&val, f) // delegate to i32's implementation } } let l = Length(9); assert_eq!(format!("l as octal is: {:o}", l), "l as octal is: 11"); assert_eq!(format!("l as octal is: {:#06o}", l), "l as octal is: 0o0011");
Required methods
pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>
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Formats the value using the given formatter.
Implementations on Foreign Types
impl Octal for NonZeroU8
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impl Octal for isize
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impl Octal for usize
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impl Octal for NonZeroU64
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impl Octal for i128
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impl Octal for NonZeroI128
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impl Octal for u64
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impl Octal for u128
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impl Octal for u32
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impl Octal for i8
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impl Octal for u16
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impl Octal for i16
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impl<'_, T> Octal for &'_ T where
T: Octal + ?Sized,
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T: Octal + ?Sized,
impl<T> Octal for Wrapping<T> where
T: Octal,
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T: Octal,
impl Octal for NonZeroI64
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impl Octal for NonZeroI32
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impl Octal for NonZeroU32
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impl Octal for NonZeroU16
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impl Octal for NonZeroU128
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impl Octal for NonZeroIsize
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impl Octal for i64
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impl<'_, T> Octal for &'_ mut T where
T: Octal + ?Sized,
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T: Octal + ?Sized,
impl Octal for NonZeroI8
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impl Octal for u8
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impl Octal for i32
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impl Octal for NonZeroUsize
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impl Octal for NonZeroI16
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impl<O, T> Octal for BitSlice<O, T> where
O: BitOrder,
T: BitStore,
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O: BitOrder,
T: BitStore,
Render the contents of a BitSlice
in a numeric format.
These implementations render the bits of memory contained in a
BitSlice
as one of the three numeric bases that the Rust format
system supports:
Binary
renders each bit individually as0
or1
,Octal
renders clusters of three bits as the numbers0
through7
,- and
UpperHex
andLowerHex
render clusters of four bits as the numbers0
through9
andA
throughF
.
The formatters produce a “word” for each element T
of memory. The
chunked formats (octal and hexadecimal) operate somewhat peculiarly:
they show the semantic value of the memory, as interpreted by the
ordering parameter’s implementation rather than the raw value of
memory you might observe with a debugger. In order to ease the
process of expanding numbers back into bits, each digit is grouped to
the right edge of the memory element. So, for example, the byte
0xFF
would be rendered in as 0o377
rather than 0o773
.
Rendered words are chunked by memory elements, rather than by as clean as possible a number of digits, in order to aid visualization of the slice’s place in memory.
impl<'_, T> Octal for Domain<'_, T> where
T: BitStore,
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T: BitStore,
impl<O, T> Octal for BitBox<O, T> where
O: BitOrder,
T: BitStore,
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O: BitOrder,
T: BitStore,
impl<O, T> Octal for BitVec<O, T> where
O: BitOrder,
T: BitStore,
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O: BitOrder,
T: BitStore,
impl<O, V> Octal for BitArray<O, V> where
O: BitOrder,
V: BitView,
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O: BitOrder,
V: BitView,
impl<T> Octal for FmtPointer<T> where
T: Octal + Pointer,
T: Octal + Pointer,
impl<T> Octal for FmtOctal<T> where
T: Octal,
T: Octal,
impl<T> Octal for FmtLowerExp<T> where
T: Octal + LowerExp,
T: Octal + LowerExp,
impl<T> Octal for FmtDisplay<T> where
T: Display + Octal,
T: Display + Octal,
impl<T> Octal for FmtLowerHex<T> where
T: Octal + LowerHex,
T: Octal + LowerHex,
impl<T> Octal for FmtUpperHex<T> where
T: Octal + UpperHex,
T: Octal + UpperHex,
impl<T> Octal for FmtUpperExp<T> where
T: Octal + UpperExp,
T: Octal + UpperExp,
impl<T> Octal for FmtBinary<T> where
T: Octal + Binary,
Loading content...T: Octal + Binary,