Struct fixed_decimal::ScientificDecimal

pub struct ScientificDecimal { /* private fields */ }

A struct containing a SignedFixedDecimal significand together with an exponent, representing a number written in scientific notation, such as 1.729×10³.

This structure represents any 0s shown in the significand and exponent, and an optional sign for both the significand and the exponent.

Implementations

impl ScientificDecimal

pub fn from(significand: SignedFixedDecimal, exponent: FixedInteger) -> Self

impl ScientificDecimal

pub fn to_string(&self) -> String

Converts the given value to a String.

Under the hood, this uses an efficient [Writeable] implementation. However, in order to avoid allocating a string, it is more efficient to use [Writeable] directly.

impl ScientificDecimal

pub fn try_from_str(s: &str) -> Result<Self, ParseError>

pub fn try_from_utf8(code_units: &[u8]) -> Result<Self, ParseError>

Trait Implementations

impl Clone for ScientificDecimal

fn clone(&self) -> ScientificDecimal

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScientificDecimal

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ScientificDecimal

This trait is implemented for compatibility with fmt!. To create a string, [Writeable::write_to_string] is usually more efficient.

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FromStr for ScientificDecimal

type Err = ParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl PartialEq for ScientificDecimal

fn eq(&self, other: &ScientificDecimal) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Writeable for ScientificDecimal

Render the ScientificDecimal as a string of ASCII digits with a possible decimal point, followed by the letter ‘e’, and the exponent.

Examples

assert_writeable_eq!(
    ScientificDecimal::from(
        {
        let mut dec = SignedFixedDecimal::from(1729u32);
        dec.multiply_pow10(-3);
        dec
    },
        FixedInteger::from(3)
    ),
    "1.729e3"
);
assert_writeable_eq!(
    ScientificDecimal::from(
        SignedFixedDecimal::from_str("+1.729").unwrap(),
        FixedInteger::from_str("+03").unwrap()
    ),
    "+1.729e+03"
);

fn write_to<W: Write + ?Sized>(&self, sink: &mut W) -> Result

Writes a string to the given sink. Errors from the sink are bubbled up. The default implementation delegates to write_to_parts, and discards any Part annotations.

fn writeable_length_hint(&self) -> LengthHint

Returns a hint for the number of UTF-8 bytes that will be written to the sink.

fn write_to_parts<S>(&self, sink: &mut S) -> Result<(), Error>

where S: PartsWrite + ?Sized,

Write bytes and Part annotations to the given sink. Errors from the sink are bubbled up. The default implementation delegates to write_to, and doesn’t produce any Part annotations.

fn write_to_string(&self) -> Cow<'_, str>

Creates a new String with the data from this Writeable. Like ToString, but smaller and faster.

impl StructuralPartialEq for ScientificDecimal