Struct Decimal

pub struct Decimal {
    pub exponent: i64,
    pub mantissa: u64,
    pub negative: bool,
    pub many_digits: bool,
}

🔬This is a nightly-only experimental API. (dec2flt)

A floating point number with up to 64 bits of mantissa and an i64 exponent.

Fields

exponent: i64

🔬This is a nightly-only experimental API. (dec2flt)

mantissa: u64

🔬This is a nightly-only experimental API. (dec2flt)

negative: bool

🔬This is a nightly-only experimental API. (dec2flt)

many_digits: bool

🔬This is a nightly-only experimental API. (dec2flt)

Implementations

impl Decimal

fn can_use_fast_path<F: RawFloat>(&self) -> bool

🔬This is a nightly-only experimental API. (dec2flt)

Detect if the float can be accurately reconstructed from native floats.

pub fn try_fast_path<F: RawFloat>(&self) -> Option<F>

🔬This is a nightly-only experimental API. (dec2flt)

Try turning the decimal into an exact float representation, using machine-sized integers and floats.

This is extracted into a separate function so that it can be attempted before constructing a Decimal. This only works if both the mantissa and the exponent can be exactly represented as a machine float, since IEE-754 guarantees no rounding will occur.

There is an exception: disguised fast-path cases, where we can shift powers-of-10 from the exponent to the significant digits.

Trait Implementations

impl Clone for Decimal

fn clone(&self) -> Decimal

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Decimal

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

Formats the value using the given formatter.

impl Default for Decimal

fn default() -> Decimal

Returns the “default value” for a type.

impl Eq for Decimal

#[doc(hidden)] fn assert_receiver_is_total_eq(&self)

impl PartialEq for Decimal

fn eq(&self, other: &Decimal) -> 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 Copy for Decimal

impl StructuralPartialEq for Decimal