Type Alias catalyst_toolbox::vote_check::explorer::transaction_by_id::Float

type Float = f64;

Implementations

impl f64

pub fn floor(self) -> f64

Returns the largest integer less than or equal to self.

Examples

let f = 3.7_f64;
let g = 3.0_f64;
let h = -3.7_f64;

assert_eq!(f.floor(), 3.0);
assert_eq!(g.floor(), 3.0);
assert_eq!(h.floor(), -4.0);

pub fn ceil(self) -> f64

Returns the smallest integer greater than or equal to self.

Examples

let f = 3.01_f64;
let g = 4.0_f64;

assert_eq!(f.ceil(), 4.0);
assert_eq!(g.ceil(), 4.0);

pub fn round(self) -> f64

Returns the nearest integer to self. If a value is half-way between two integers, round away from 0.0.

Examples

let f = 3.3_f64;
let g = -3.3_f64;
let h = -3.7_f64;
let i = 3.5_f64;
let j = 4.5_f64;

assert_eq!(f.round(), 3.0);
assert_eq!(g.round(), -3.0);
assert_eq!(h.round(), -4.0);
assert_eq!(i.round(), 4.0);
assert_eq!(j.round(), 5.0);

pub fn round_ties_even(self) -> f64

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

Returns the nearest integer to a number. Rounds half-way cases to the number with an even least significant digit.

Examples

#![feature(round_ties_even)]

let f = 3.3_f64;
let g = -3.3_f64;
let h = 3.5_f64;
let i = 4.5_f64;

assert_eq!(f.round_ties_even(), 3.0);
assert_eq!(g.round_ties_even(), -3.0);
assert_eq!(h.round_ties_even(), 4.0);
assert_eq!(i.round_ties_even(), 4.0);

pub fn trunc(self) -> f64

Returns the integer part of self. This means that non-integer numbers are always truncated towards zero.

Examples

let f = 3.7_f64;
let g = 3.0_f64;
let h = -3.7_f64;

assert_eq!(f.trunc(), 3.0);
assert_eq!(g.trunc(), 3.0);
assert_eq!(h.trunc(), -3.0);

pub fn fract(self) -> f64

Returns the fractional part of self.

Examples

let x = 3.6_f64;
let y = -3.6_f64;
let abs_difference_x = (x.fract() - 0.6).abs();
let abs_difference_y = (y.fract() - (-0.6)).abs();

assert!(abs_difference_x < 1e-10);
assert!(abs_difference_y < 1e-10);

pub fn abs(self) -> f64

Computes the absolute value of self.

Examples

let x = 3.5_f64;
let y = -3.5_f64;

let abs_difference_x = (x.abs() - x).abs();
let abs_difference_y = (y.abs() - (-y)).abs();

assert!(abs_difference_x < 1e-10);
assert!(abs_difference_y < 1e-10);

assert!(f64::NAN.abs().is_nan());

pub fn signum(self) -> f64

Returns a number that represents the sign of self.

• 1.0 if the number is positive, +0.0 or INFINITY
• -1.0 if the number is negative, -0.0 or NEG_INFINITY
• NaN if the number is NaN

Examples

let f = 3.5_f64;

assert_eq!(f.signum(), 1.0);
assert_eq!(f64::NEG_INFINITY.signum(), -1.0);

assert!(f64::NAN.signum().is_nan());

pub fn copysign(self, sign: f64) -> f64

Returns a number composed of the magnitude of self and the sign of sign.

Equal to self if the sign of self and sign are the same, otherwise equal to -self. If self is a NaN, then a NaN with the sign bit of sign is returned. Note, however, that conserving the sign bit on NaN across arithmetical operations is not generally guaranteed. See explanation of NaN as a special value for more info.

Examples

let f = 3.5_f64;

assert_eq!(f.copysign(0.42), 3.5_f64);
assert_eq!(f.copysign(-0.42), -3.5_f64);
assert_eq!((-f).copysign(0.42), 3.5_f64);
assert_eq!((-f).copysign(-0.42), -3.5_f64);

assert!(f64::NAN.copysign(1.0).is_nan());

pub fn mul_add(self, a: f64, b: f64) -> f64

Fused multiply-add. Computes (self * a) + b with only one rounding error, yielding a more accurate result than an unfused multiply-add.

Using mul_add may be more performant than an unfused multiply-add if the target architecture has a dedicated fma CPU instruction. However, this is not always true, and will be heavily dependant on designing algorithms with specific target hardware in mind.

Examples

let m = 10.0_f64;
let x = 4.0_f64;
let b = 60.0_f64;

// 100.0
let abs_difference = (m.mul_add(x, b) - ((m * x) + b)).abs();

assert!(abs_difference < 1e-10);

pub fn div_euclid(self, rhs: f64) -> f64

Calculates Euclidean division, the matching method for rem_euclid.

This computes the integer n such that self = n * rhs + self.rem_euclid(rhs). In other words, the result is self / rhs rounded to the integer n such that self >= n * rhs.

Examples

let a: f64 = 7.0;
let b = 4.0;
assert_eq!(a.div_euclid(b), 1.0); // 7.0 > 4.0 * 1.0
assert_eq!((-a).div_euclid(b), -2.0); // -7.0 >= 4.0 * -2.0
assert_eq!(a.div_euclid(-b), -1.0); // 7.0 >= -4.0 * -1.0
assert_eq!((-a).div_euclid(-b), 2.0); // -7.0 >= -4.0 * 2.0

pub fn rem_euclid(self, rhs: f64) -> f64

Calculates the least nonnegative remainder of self (mod rhs).

In particular, the return value r satisfies 0.0 <= r < rhs.abs() in most cases. However, due to a floating point round-off error it can result in r == rhs.abs(), violating the mathematical definition, if self is much smaller than rhs.abs() in magnitude and self < 0.0. This result is not an element of the function’s codomain, but it is the closest floating point number in the real numbers and thus fulfills the property self == self.div_euclid(rhs) * rhs + self.rem_euclid(rhs) approximately.

Examples

let a: f64 = 7.0;
let b = 4.0;
assert_eq!(a.rem_euclid(b), 3.0);
assert_eq!((-a).rem_euclid(b), 1.0);
assert_eq!(a.rem_euclid(-b), 3.0);
assert_eq!((-a).rem_euclid(-b), 1.0);
// limitation due to round-off error
assert!((-f64::EPSILON).rem_euclid(3.0) != 0.0);

pub fn powi(self, n: i32) -> f64

Raises a number to an integer power.

Using this function is generally faster than using powf. It might have a different sequence of rounding operations than powf, so the results are not guaranteed to agree.

Examples

let x = 2.0_f64;
let abs_difference = (x.powi(2) - (x * x)).abs();

assert!(abs_difference < 1e-10);

pub fn powf(self, n: f64) -> f64

Raises a number to a floating point power.

Examples

let x = 2.0_f64;
let abs_difference = (x.powf(2.0) - (x * x)).abs();

assert!(abs_difference < 1e-10);

pub fn sqrt(self) -> f64

Returns the square root of a number.

Returns NaN if self is a negative number other than -0.0.

Examples

let positive = 4.0_f64;
let negative = -4.0_f64;
let negative_zero = -0.0_f64;

let abs_difference = (positive.sqrt() - 2.0).abs();

assert!(abs_difference < 1e-10);
assert!(negative.sqrt().is_nan());
assert!(negative_zero.sqrt() == negative_zero);

pub fn exp(self) -> f64

Returns e^(self), (the exponential function).

Examples

let one = 1.0_f64;
// e^1
let e = one.exp();

// ln(e) - 1 == 0
let abs_difference = (e.ln() - 1.0).abs();

assert!(abs_difference < 1e-10);

pub fn exp2(self) -> f64

Returns 2^(self).

Examples

let f = 2.0_f64;

// 2^2 - 4 == 0
let abs_difference = (f.exp2() - 4.0).abs();

assert!(abs_difference < 1e-10);

pub fn ln(self) -> f64

Returns the natural logarithm of the number.

Examples

let one = 1.0_f64;
// e^1
let e = one.exp();

// ln(e) - 1 == 0
let abs_difference = (e.ln() - 1.0).abs();

assert!(abs_difference < 1e-10);

pub fn log(self, base: f64) -> f64

Returns the logarithm of the number with respect to an arbitrary base.

The result might not be correctly rounded owing to implementation details; self.log2() can produce more accurate results for base 2, and self.log10() can produce more accurate results for base 10.

Examples

let twenty_five = 25.0_f64;

// log5(25) - 2 == 0
let abs_difference = (twenty_five.log(5.0) - 2.0).abs();

assert!(abs_difference < 1e-10);

pub fn log2(self) -> f64

Returns the base 2 logarithm of the number.

Examples

let four = 4.0_f64;

// log2(4) - 2 == 0
let abs_difference = (four.log2() - 2.0).abs();

assert!(abs_difference < 1e-10);

pub fn log10(self) -> f64

Returns the base 10 logarithm of the number.

Examples

let hundred = 100.0_f64;

// log10(100) - 2 == 0
let abs_difference = (hundred.log10() - 2.0).abs();

assert!(abs_difference < 1e-10);

pub fn abs_sub(self, other: f64) -> f64

👎Deprecated since 1.10.0: you probably meant (self - other).abs(): this operation is (self - other).max(0.0) except that abs_sub also propagates NaNs (also known as fdim in C). If you truly need the positive difference, consider using that expression or the C function fdim, depending on how you wish to handle NaN (please consider filing an issue describing your use-case too).

The positive difference of two numbers.

• If self <= other: 0.0
• Else: self - other

Examples

let x = 3.0_f64;
let y = -3.0_f64;

let abs_difference_x = (x.abs_sub(1.0) - 2.0).abs();
let abs_difference_y = (y.abs_sub(1.0) - 0.0).abs();

assert!(abs_difference_x < 1e-10);
assert!(abs_difference_y < 1e-10);

pub fn cbrt(self) -> f64

Returns the cube root of a number.

Examples

let x = 8.0_f64;

// x^(1/3) - 2 == 0
let abs_difference = (x.cbrt() - 2.0).abs();

assert!(abs_difference < 1e-10);

pub fn hypot(self, other: f64) -> f64

Compute the distance between the origin and a point (x, y) on the Euclidean plane. Equivalently, compute the length of the hypotenuse of a right-angle triangle with other sides having length x.abs() and y.abs().

Examples

let x = 2.0_f64;
let y = 3.0_f64;

// sqrt(x^2 + y^2)
let abs_difference = (x.hypot(y) - (x.powi(2) + y.powi(2)).sqrt()).abs();

assert!(abs_difference < 1e-10);

pub fn sin(self) -> f64

Computes the sine of a number (in radians).

Examples

let x = std::f64::consts::FRAC_PI_2;

let abs_difference = (x.sin() - 1.0).abs();

assert!(abs_difference < 1e-10);

pub fn cos(self) -> f64

Computes the cosine of a number (in radians).

Examples

let x = 2.0 * std::f64::consts::PI;

let abs_difference = (x.cos() - 1.0).abs();

assert!(abs_difference < 1e-10);

pub fn tan(self) -> f64

Computes the tangent of a number (in radians).

Examples

let x = std::f64::consts::FRAC_PI_4;
let abs_difference = (x.tan() - 1.0).abs();

assert!(abs_difference < 1e-14);

pub fn asin(self) -> f64

Computes the arcsine of a number. Return value is in radians in the range [-pi/2, pi/2] or NaN if the number is outside the range [-1, 1].

Examples

let f = std::f64::consts::FRAC_PI_2;

// asin(sin(pi/2))
let abs_difference = (f.sin().asin() - std::f64::consts::FRAC_PI_2).abs();

assert!(abs_difference < 1e-10);

pub fn acos(self) -> f64

Computes the arccosine of a number. Return value is in radians in the range [0, pi] or NaN if the number is outside the range [-1, 1].

Examples

let f = std::f64::consts::FRAC_PI_4;

// acos(cos(pi/4))
let abs_difference = (f.cos().acos() - std::f64::consts::FRAC_PI_4).abs();

assert!(abs_difference < 1e-10);

pub fn atan(self) -> f64

Computes the arctangent of a number. Return value is in radians in the range [-pi/2, pi/2];

Examples

let f = 1.0_f64;

// atan(tan(1))
let abs_difference = (f.tan().atan() - 1.0).abs();

assert!(abs_difference < 1e-10);

pub fn atan2(self, other: f64) -> f64

Computes the four quadrant arctangent of self (y) and other (x) in radians.

• x = 0, y = 0: 0
• x >= 0: arctan(y/x) -> [-pi/2, pi/2]
• y >= 0: arctan(y/x) + pi -> (pi/2, pi]
• y < 0: arctan(y/x) - pi -> (-pi, -pi/2)

Examples

// Positive angles measured counter-clockwise
// from positive x axis
// -pi/4 radians (45 deg clockwise)
let x1 = 3.0_f64;
let y1 = -3.0_f64;

// 3pi/4 radians (135 deg counter-clockwise)
let x2 = -3.0_f64;
let y2 = 3.0_f64;

let abs_difference_1 = (y1.atan2(x1) - (-std::f64::consts::FRAC_PI_4)).abs();
let abs_difference_2 = (y2.atan2(x2) - (3.0 * std::f64::consts::FRAC_PI_4)).abs();

assert!(abs_difference_1 < 1e-10);
assert!(abs_difference_2 < 1e-10);

pub fn sin_cos(self) -> (f64, f64)

Simultaneously computes the sine and cosine of the number, x. Returns (sin(x), cos(x)).

Examples

let x = std::f64::consts::FRAC_PI_4;
let f = x.sin_cos();

let abs_difference_0 = (f.0 - x.sin()).abs();
let abs_difference_1 = (f.1 - x.cos()).abs();

assert!(abs_difference_0 < 1e-10);
assert!(abs_difference_1 < 1e-10);

pub fn exp_m1(self) -> f64

Returns e^(self) - 1 in a way that is accurate even if the number is close to zero.

Examples

let x = 1e-16_f64;

// for very small x, e^x is approximately 1 + x + x^2 / 2
let approx = x + x * x / 2.0;
let abs_difference = (x.exp_m1() - approx).abs();

assert!(abs_difference < 1e-20);

pub fn ln_1p(self) -> f64

Returns ln(1+n) (natural logarithm) more accurately than if the operations were performed separately.

Examples

let x = 1e-16_f64;

// for very small x, ln(1 + x) is approximately x - x^2 / 2
let approx = x - x * x / 2.0;
let abs_difference = (x.ln_1p() - approx).abs();

assert!(abs_difference < 1e-20);

pub fn sinh(self) -> f64

Hyperbolic sine function.

Examples

let e = std::f64::consts::E;
let x = 1.0_f64;

let f = x.sinh();
// Solving sinh() at 1 gives `(e^2-1)/(2e)`
let g = ((e * e) - 1.0) / (2.0 * e);
let abs_difference = (f - g).abs();

assert!(abs_difference < 1e-10);

pub fn cosh(self) -> f64

Hyperbolic cosine function.

Examples

let e = std::f64::consts::E;
let x = 1.0_f64;
let f = x.cosh();
// Solving cosh() at 1 gives this result
let g = ((e * e) + 1.0) / (2.0 * e);
let abs_difference = (f - g).abs();

// Same result
assert!(abs_difference < 1.0e-10);

pub fn tanh(self) -> f64

Hyperbolic tangent function.

Examples

let e = std::f64::consts::E;
let x = 1.0_f64;

let f = x.tanh();
// Solving tanh() at 1 gives `(1 - e^(-2))/(1 + e^(-2))`
let g = (1.0 - e.powi(-2)) / (1.0 + e.powi(-2));
let abs_difference = (f - g).abs();

assert!(abs_difference < 1.0e-10);

pub fn asinh(self) -> f64

Inverse hyperbolic sine function.

Examples

let x = 1.0_f64;
let f = x.sinh().asinh();

let abs_difference = (f - x).abs();

assert!(abs_difference < 1.0e-10);

pub fn acosh(self) -> f64

Inverse hyperbolic cosine function.

Examples

let x = 1.0_f64;
let f = x.cosh().acosh();

let abs_difference = (f - x).abs();

assert!(abs_difference < 1.0e-10);

pub fn atanh(self) -> f64

Inverse hyperbolic tangent function.

Examples

let e = std::f64::consts::E;
let f = e.tanh().atanh();

let abs_difference = (f - e).abs();

assert!(abs_difference < 1.0e-10);

pub fn gamma(self) -> f64

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

Gamma function.

Examples

#![feature(float_gamma)]
let x = 5.0f64;

let abs_difference = (x.gamma() - 24.0).abs();

assert!(abs_difference <= f64::EPSILON);

pub fn ln_gamma(self) -> (f64, i32)

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

Natural logarithm of the absolute value of the gamma function

The integer part of the tuple indicates the sign of the gamma function.

Examples

#![feature(float_gamma)]
let x = 2.0f64;

let abs_difference = (x.ln_gamma().0 - 0.0).abs();

assert!(abs_difference <= f64::EPSILON);

impl f64

pub const RADIX: u32 = 2u32

The radix or base of the internal representation of f64.

pub const MANTISSA_DIGITS: u32 = 53u32

Number of significant digits in base 2.

pub const DIGITS: u32 = 15u32

Approximate number of significant digits in base 10.

pub const EPSILON: f64 = 2.2204460492503131E-16f64

Machine epsilon value for f64.

This is the difference between 1.0 and the next larger representable number.

pub const MIN: f64 = -1.7976931348623157E+308f64

Smallest finite f64 value.

pub const MIN_POSITIVE: f64 = 2.2250738585072014E-308f64

Smallest positive normal f64 value.

pub const MAX: f64 = 1.7976931348623157E+308f64

Largest finite f64 value.

pub const MIN_EXP: i32 = -1_021i32

One greater than the minimum possible normal power of 2 exponent.

pub const MAX_EXP: i32 = 1_024i32

Maximum possible power of 2 exponent.

pub const MIN_10_EXP: i32 = -307i32

Minimum possible normal power of 10 exponent.

pub const MAX_10_EXP: i32 = 308i32

Maximum possible power of 10 exponent.

pub const NAN: f64 = NaNf64

Not a Number (NaN).

Note that IEEE 754 doesn’t define just a single NaN value; a plethora of bit patterns are considered to be NaN. Furthermore, the standard makes a difference between a “signaling” and a “quiet” NaN, and allows inspecting its “payload” (the unspecified bits in the bit pattern). This constant isn’t guaranteed to equal to any specific NaN bitpattern, and the stability of its representation over Rust versions and target platforms isn’t guaranteed.

pub const INFINITY: f64 = +Inff64

Infinity (∞).

pub const NEG_INFINITY: f64 = -Inff64

Negative infinity (−∞).

pub fn is_nan(self) -> bool

Returns true if this value is NaN.

let nan = f64::NAN;
let f = 7.0_f64;

assert!(nan.is_nan());
assert!(!f.is_nan());

pub fn is_infinite(self) -> bool

Returns true if this value is positive infinity or negative infinity, and false otherwise.

let f = 7.0f64;
let inf = f64::INFINITY;
let neg_inf = f64::NEG_INFINITY;
let nan = f64::NAN;

assert!(!f.is_infinite());
assert!(!nan.is_infinite());

assert!(inf.is_infinite());
assert!(neg_inf.is_infinite());

pub fn is_finite(self) -> bool

Returns true if this number is neither infinite nor NaN.

let f = 7.0f64;
let inf: f64 = f64::INFINITY;
let neg_inf: f64 = f64::NEG_INFINITY;
let nan: f64 = f64::NAN;

assert!(f.is_finite());

assert!(!nan.is_finite());
assert!(!inf.is_finite());
assert!(!neg_inf.is_finite());

pub fn is_subnormal(self) -> bool

Returns true if the number is subnormal.

let min = f64::MIN_POSITIVE; // 2.2250738585072014e-308_f64
let max = f64::MAX;
let lower_than_min = 1.0e-308_f64;
let zero = 0.0_f64;

assert!(!min.is_subnormal());
assert!(!max.is_subnormal());

assert!(!zero.is_subnormal());
assert!(!f64::NAN.is_subnormal());
assert!(!f64::INFINITY.is_subnormal());
// Values between `0` and `min` are Subnormal.
assert!(lower_than_min.is_subnormal());

pub fn is_normal(self) -> bool

Returns true if the number is neither zero, infinite, subnormal, or NaN.

let min = f64::MIN_POSITIVE; // 2.2250738585072014e-308f64
let max = f64::MAX;
let lower_than_min = 1.0e-308_f64;
let zero = 0.0f64;

assert!(min.is_normal());
assert!(max.is_normal());

assert!(!zero.is_normal());
assert!(!f64::NAN.is_normal());
assert!(!f64::INFINITY.is_normal());
// Values between `0` and `min` are Subnormal.
assert!(!lower_than_min.is_normal());

pub fn classify(self) -> FpCategory

Returns the floating point category of the number. If only one property is going to be tested, it is generally faster to use the specific predicate instead.

use std::num::FpCategory;

let num = 12.4_f64;
let inf = f64::INFINITY;

assert_eq!(num.classify(), FpCategory::Normal);
assert_eq!(inf.classify(), FpCategory::Infinite);

pub fn is_sign_positive(self) -> bool

Returns true if self has a positive sign, including +0.0, NaNs with positive sign bit and positive infinity. Note that IEEE 754 doesn’t assign any meaning to the sign bit in case of a NaN, and as Rust doesn’t guarantee that the bit pattern of NaNs are conserved over arithmetic operations, the result of is_sign_positive on a NaN might produce an unexpected result in some cases. See explanation of NaN as a special value for more info.

let f = 7.0_f64;
let g = -7.0_f64;

assert!(f.is_sign_positive());
assert!(!g.is_sign_positive());

pub fn is_sign_negative(self) -> bool

Returns true if self has a negative sign, including -0.0, NaNs with negative sign bit and negative infinity. Note that IEEE 754 doesn’t assign any meaning to the sign bit in case of a NaN, and as Rust doesn’t guarantee that the bit pattern of NaNs are conserved over arithmetic operations, the result of is_sign_negative on a NaN might produce an unexpected result in some cases. See explanation of NaN as a special value for more info.

let f = 7.0_f64;
let g = -7.0_f64;

assert!(!f.is_sign_negative());
assert!(g.is_sign_negative());

pub fn next_up(self) -> f64

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

Returns the least number greater than self.

Let TINY be the smallest representable positive f64. Then,

• if self.is_nan(), this returns self;
• if self is NEG_INFINITY, this returns MIN;
• if self is -TINY, this returns -0.0;
• if self is -0.0 or +0.0, this returns TINY;
• if self is MAX or INFINITY, this returns INFINITY;
• otherwise the unique least value greater than self is returned.

The identity x.next_up() == -(-x).next_down() holds for all non-NaN x. When x is finite x == x.next_up().next_down() also holds.

#![feature(float_next_up_down)]
// f64::EPSILON is the difference between 1.0 and the next number up.
assert_eq!(1.0f64.next_up(), 1.0 + f64::EPSILON);
// But not for most numbers.
assert!(0.1f64.next_up() < 0.1 + f64::EPSILON);
assert_eq!(9007199254740992f64.next_up(), 9007199254740994.0);

pub fn next_down(self) -> f64

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

Returns the greatest number less than self.

Let TINY be the smallest representable positive f64. Then,

• if self.is_nan(), this returns self;
• if self is INFINITY, this returns MAX;
• if self is TINY, this returns 0.0;
• if self is -0.0 or +0.0, this returns -TINY;
• if self is MIN or NEG_INFINITY, this returns NEG_INFINITY;
• otherwise the unique greatest value less than self is returned.

The identity x.next_down() == -(-x).next_up() holds for all non-NaN x. When x is finite x == x.next_down().next_up() also holds.

#![feature(float_next_up_down)]
let x = 1.0f64;
// Clamp value into range [0, 1).
let clamped = x.clamp(0.0, 1.0f64.next_down());
assert!(clamped < 1.0);
assert_eq!(clamped.next_up(), 1.0);

pub fn recip(self) -> f64

Takes the reciprocal (inverse) of a number, 1/x.

let x = 2.0_f64;
let abs_difference = (x.recip() - (1.0 / x)).abs();

assert!(abs_difference < 1e-10);

pub fn to_degrees(self) -> f64

Converts radians to degrees.

let angle = std::f64::consts::PI;

let abs_difference = (angle.to_degrees() - 180.0).abs();

assert!(abs_difference < 1e-10);

pub fn to_radians(self) -> f64

Converts degrees to radians.

let angle = 180.0_f64;

let abs_difference = (angle.to_radians() - std::f64::consts::PI).abs();

assert!(abs_difference < 1e-10);

pub fn max(self, other: f64) -> f64

Returns the maximum of the two numbers, ignoring NaN.

If one of the arguments is NaN, then the other argument is returned. This follows the IEEE 754-2008 semantics for maxNum, except for handling of signaling NaNs; this function handles all NaNs the same way and avoids maxNum’s problems with associativity. This also matches the behavior of libm’s fmax.

let x = 1.0_f64;
let y = 2.0_f64;

assert_eq!(x.max(y), y);

pub fn min(self, other: f64) -> f64

Returns the minimum of the two numbers, ignoring NaN.

If one of the arguments is NaN, then the other argument is returned. This follows the IEEE 754-2008 semantics for minNum, except for handling of signaling NaNs; this function handles all NaNs the same way and avoids minNum’s problems with associativity. This also matches the behavior of libm’s fmin.

let x = 1.0_f64;
let y = 2.0_f64;

assert_eq!(x.min(y), x);

pub fn maximum(self, other: f64) -> f64

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

Returns the maximum of the two numbers, propagating NaN.

This returns NaN when either argument is NaN, as opposed to f64::max which only returns NaN when both arguments are NaN.

#![feature(float_minimum_maximum)]
let x = 1.0_f64;
let y = 2.0_f64;

assert_eq!(x.maximum(y), y);
assert!(x.maximum(f64::NAN).is_nan());

If one of the arguments is NaN, then NaN is returned. Otherwise this returns the greater of the two numbers. For this operation, -0.0 is considered to be less than +0.0. Note that this follows the semantics specified in IEEE 754-2019.

Also note that “propagation” of NaNs here doesn’t necessarily mean that the bitpattern of a NaN operand is conserved; see explanation of NaN as a special value for more info.

pub fn minimum(self, other: f64) -> f64

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

Returns the minimum of the two numbers, propagating NaN.

This returns NaN when either argument is NaN, as opposed to f64::min which only returns NaN when both arguments are NaN.

#![feature(float_minimum_maximum)]
let x = 1.0_f64;
let y = 2.0_f64;

assert_eq!(x.minimum(y), x);
assert!(x.minimum(f64::NAN).is_nan());

If one of the arguments is NaN, then NaN is returned. Otherwise this returns the lesser of the two numbers. For this operation, -0.0 is considered to be less than +0.0. Note that this follows the semantics specified in IEEE 754-2019.

Also note that “propagation” of NaNs here doesn’t necessarily mean that the bitpattern of a NaN operand is conserved; see explanation of NaN as a special value for more info.

pub fn midpoint(self, other: f64) -> f64

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

Calculates the middle point of self and rhs.

This returns NaN when either argument is NaN or if a combination of +inf and -inf is provided as arguments.

Examples

#![feature(num_midpoint)]
assert_eq!(1f64.midpoint(4.0), 2.5);
assert_eq!((-5.5f64).midpoint(8.0), 1.25);

pub unsafe fn to_int_unchecked<Int>(self) -> Intwhere f64: FloatToInt<Int>,

Rounds toward zero and converts to any primitive integer type, assuming that the value is finite and fits in that type.

let value = 4.6_f64;
let rounded = unsafe { value.to_int_unchecked::<u16>() };
assert_eq!(rounded, 4);

let value = -128.9_f64;
let rounded = unsafe { value.to_int_unchecked::<i8>() };
assert_eq!(rounded, i8::MIN);

Safety

The value must:

• Not be NaN
• Not be infinite
• Be representable in the return type Int, after truncating off its fractional part

pub fn to_bits(self) -> u64

Raw transmutation to u64.

This is currently identical to transmute::<f64, u64>(self) on all platforms.

See from_bits for some discussion of the portability of this operation (there are almost no issues).

Note that this function is distinct from as casting, which attempts to preserve the numeric value, and not the bitwise value.

Examples

assert!((1f64).to_bits() != 1f64 as u64); // to_bits() is not casting!
assert_eq!((12.5f64).to_bits(), 0x4029000000000000);

pub fn from_bits(v: u64) -> f64

Raw transmutation from u64.

This is currently identical to transmute::<u64, f64>(v) on all platforms. It turns out this is incredibly portable, for two reasons:

• Floats and Ints have the same endianness on all supported platforms.
• IEEE 754 very precisely specifies the bit layout of floats.

However there is one caveat: prior to the 2008 version of IEEE 754, how to interpret the NaN signaling bit wasn’t actually specified. Most platforms (notably x86 and ARM) picked the interpretation that was ultimately standardized in 2008, but some didn’t (notably MIPS). As a result, all signaling NaNs on MIPS are quiet NaNs on x86, and vice-versa.

Rather than trying to preserve signaling-ness cross-platform, this implementation favors preserving the exact bits. This means that any payloads encoded in NaNs will be preserved even if the result of this method is sent over the network from an x86 machine to a MIPS one.

If the results of this method are only manipulated by the same architecture that produced them, then there is no portability concern.

If the input isn’t NaN, then there is no portability concern.

If you don’t care about signaling-ness (very likely), then there is no portability concern.

Note that this function is distinct from as casting, which attempts to preserve the numeric value, and not the bitwise value.

Examples

let v = f64::from_bits(0x4029000000000000);
assert_eq!(v, 12.5);

pub fn to_be_bytes(self) -> [u8; 8]

Return the memory representation of this floating point number as a byte array in big-endian (network) byte order.

See from_bits for some discussion of the portability of this operation (there are almost no issues).

Examples

let bytes = 12.5f64.to_be_bytes();
assert_eq!(bytes, [0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);

pub fn to_le_bytes(self) -> [u8; 8]

Return the memory representation of this floating point number as a byte array in little-endian byte order.

See from_bits for some discussion of the portability of this operation (there are almost no issues).

Examples

let bytes = 12.5f64.to_le_bytes();
assert_eq!(bytes, [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40]);

pub fn to_ne_bytes(self) -> [u8; 8]

Return the memory representation of this floating point number 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.

See from_bits for some discussion of the portability of this operation (there are almost no issues).

Examples

let bytes = 12.5f64.to_ne_bytes();
assert_eq!(
    bytes,
    if cfg!(target_endian = "big") {
        [0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
    } else {
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40]
    }
);

pub fn from_be_bytes(bytes: [u8; 8]) -> f64

Create a floating point value from its representation as a byte array in big endian.

See from_bits for some discussion of the portability of this operation (there are almost no issues).

Examples

let value = f64::from_be_bytes([0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
assert_eq!(value, 12.5);

pub fn from_le_bytes(bytes: [u8; 8]) -> f64

Create a floating point value from its representation as a byte array in little endian.

See from_bits for some discussion of the portability of this operation (there are almost no issues).

Examples

let value = f64::from_le_bytes([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40]);
assert_eq!(value, 12.5);

pub fn from_ne_bytes(bytes: [u8; 8]) -> f64

Create a floating point value from its representation as a byte array in native endian.

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.

See from_bits for some discussion of the portability of this operation (there are almost no issues).

Examples

let value = f64::from_ne_bytes(if cfg!(target_endian = "big") {
    [0x40, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]
} else {
    [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x40]
});
assert_eq!(value, 12.5);

pub fn total_cmp(&self, other: &f64) -> Ordering

Return the ordering between self and other.

Unlike the standard partial comparison between floating point numbers, this comparison always produces an ordering in accordance to the totalOrder predicate as defined in the IEEE 754 (2008 revision) floating point standard. The values are ordered in the following sequence:

• negative quiet NaN
• negative signaling NaN
• negative infinity
• negative numbers
• negative subnormal numbers
• negative zero
• positive zero
• positive subnormal numbers
• positive numbers
• positive infinity
• positive signaling NaN
• positive quiet NaN.

The ordering established by this function does not always agree with the PartialOrd and PartialEq implementations of f64. For example, they consider negative and positive zero equal, while total_cmp doesn’t.

The interpretation of the signaling NaN bit follows the definition in the IEEE 754 standard, which may not match the interpretation by some of the older, non-conformant (e.g. MIPS) hardware implementations.

Example

struct GoodBoy {
    name: String,
    weight: f64,
}

let mut bois = vec![
    GoodBoy { name: "Pucci".to_owned(), weight: 0.1 },
    GoodBoy { name: "Woofer".to_owned(), weight: 99.0 },
    GoodBoy { name: "Yapper".to_owned(), weight: 10.0 },
    GoodBoy { name: "Chonk".to_owned(), weight: f64::INFINITY },
    GoodBoy { name: "Abs. Unit".to_owned(), weight: f64::NAN },
    GoodBoy { name: "Floaty".to_owned(), weight: -5.0 },
];

bois.sort_by(|a, b| a.weight.total_cmp(&b.weight));

pub fn clamp(self, min: f64, max: f64) -> f64

Restrict a value to a certain interval unless it is NaN.

Returns max if self is greater than max, and min if self is less than min. Otherwise this returns self.

Note that this function returns NaN if the initial value was NaN as well.

Panics

Panics if min > max, min is NaN, or max is NaN.

Examples

assert!((-3.0f64).clamp(-2.0, 1.0) == -2.0);
assert!((0.0f64).clamp(-2.0, 1.0) == 0.0);
assert!((2.0f64).clamp(-2.0, 1.0) == 1.0);
assert!((f64::NAN).clamp(-2.0, 1.0).is_nan());

Trait Implementations

impl<'a> Add<&'a Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the + operator.

fn add(self, other: &Complex<f64>) -> Complex<f64>

Performs the + operation.

impl Add<&f64> for f64

type Output = <f64 as Add<f64>>::Output

The resulting type after applying the + operator.

fn add(self, other: &f64) -> <f64 as Add<f64>>::Output

Performs the + operation.

impl Add<Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the + operator.

fn add(self, other: Complex<f64>) -> <f64 as Add<Complex<f64>>>::Output

Performs the + operation.

impl Add<Unit> for f64

type Output = f64

The resulting type after applying the + operator.

fn add(self, other: Unit) -> <f64 as Add<Unit>>::Output

Performs the + operation.

impl Add<f64> for f64

type Output = f64

The resulting type after applying the + operator.

fn add(self, other: f64) -> f64

Performs the + operation.

impl AddAssign<&f64> for f64

fn add_assign(&mut self, other: &f64)

Performs the += operation.

impl AddAssign<f64> for f64

fn add_assign(&mut self, other: f64)

Performs the += operation.

impl Amounts for f64

const NUM_1000: f64 = 1000f64

The constant representing 1000, for decimal prefixes.

const NUM_1024: f64 = 1024f64

The constant representing 1024, for binary prefixes.

fn is_negative(self) -> bool

Whether this number is negative. This is used internally.

impl ApproxEq for f64

type Margin = F64Margin

This type type defines a margin within which two values are to be considered approximately equal. It must implement Default so that approx_eq() can be called on unknown types.

fn approx_eq<M>(self, other: f64, margin: M) -> boolwhere M: Into<<f64 as ApproxEq>::Margin>,

This method tests that the self and other values are equal within margin of each other.

fn approx_ne<M>(self, other: Self, margin: M) -> boolwhere M: Into<Self::Margin>,

This method tests that the self and other values are not within margin of each other.

impl ApproxEqRatio for f64

fn approx_eq_ratio(&self, other: &Self, ratio: Self) -> bool

This method tests if self and other are nearly equal by bounding the difference between them to some number much less than the larger of the two. This bound is set as the ratio of the difference to the larger.

fn approx_ne_ratio(&self, other: &Self, ratio: Self) -> bool

This method tests if self and other are not nearly equal by bounding the difference between them to some number much less than the larger of the two. This bound is set as the ratio of the difference to the larger.

impl ApproxEqUlps for f64

type Flt = f64

fn approx_eq_ulps(&self, other: &f64, ulps: i64) -> bool

This method tests for self and other values to be approximately equal within ULPs (Units of Least Precision) floating point representations. Differing signs are always unequal with this method, and zeroes are only equal to zeroes. Use approx_eq() from the ApproxEq trait if that is more appropriate.

fn approx_ne_ulps(&self, other: &Self, ulps: <Self::Flt as Ulps>::U) -> bool

This method tests for self and other values to be not approximately equal within ULPs (Units of Least Precision) floating point representations. Differing signs are always unequal with this method, and zeroes are only equal to zeroes. Use approx_eq() from the ApproxEq trait if that is more appropriate.

impl Arbitrary for f64

type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.

type Strategy = Any

The type of Strategy used to generate values of type Self.

fn arbitrary_with( _args: <f64 as Arbitrary>::Parameters ) -> <f64 as Arbitrary>::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args.

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self).

impl Arbitrary for f64

fn arbitrary<G>(g: &mut G) -> f64where G: Gen,

fn shrink(&self) -> Box<dyn Iterator<Item = f64>, Global>

impl AsBytes for f64

fn as_bytes(&self) -> &[u8]

Gets the bytes of this value.

fn as_bytes_mut(&mut self) -> &mut [u8] where Self: FromBytes,

Gets the bytes of this value mutably.

fn write_to(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to bytes.

fn write_to_prefix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the prefix of bytes.

fn write_to_suffix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the suffix of bytes.

impl AsExpression<Double> for f64

type Expression = Bound<Double, f64>

The expression being returned

fn as_expression(self) -> <f64 as AsExpression<Double>>::Expression

Perform the conversion

impl AsExpression<Nullable<Double>> for f64

type Expression = Bound<Nullable<Double>, f64>

The expression being returned

fn as_expression(self) -> <f64 as AsExpression<Nullable<Double>>>::Expression

Perform the conversion

impl AsPrimitive<f32> for f64

fn as_(self) -> f32

Convert a value to another, using the as operator.

impl AsPrimitive<f64> for f64

fn as_(self) -> f64

Convert a value to another, using the as operator.

impl AsPrimitive<i128> for f64

fn as_(self) -> i128

Convert a value to another, using the as operator.

impl AsPrimitive<i16> for f64

fn as_(self) -> i16

Convert a value to another, using the as operator.

impl AsPrimitive<i32> for f64

fn as_(self) -> i32

Convert a value to another, using the as operator.

impl AsPrimitive<i64> for f64

fn as_(self) -> i64

Convert a value to another, using the as operator.

impl AsPrimitive<i8> for f64

fn as_(self) -> i8

Convert a value to another, using the as operator.

impl AsPrimitive<isize> for f64

fn as_(self) -> isize

Convert a value to another, using the as operator.

impl AsPrimitive<u128> for f64

fn as_(self) -> u128

Convert a value to another, using the as operator.

impl AsPrimitive<u16> for f64

fn as_(self) -> u16

Convert a value to another, using the as operator.

impl AsPrimitive<u32> for f64

fn as_(self) -> u32

Convert a value to another, using the as operator.

impl AsPrimitive<u64> for f64

fn as_(self) -> u64

Convert a value to another, using the as operator.

impl AsPrimitive<u8> for f64

fn as_(self) -> u8

Convert a value to another, using the as operator.

impl AsPrimitive<usize> for f64

fn as_(self) -> usize

Convert a value to another, using the as operator.

impl Bounded for f64

fn min_value() -> f64

Returns the smallest finite number this type can represent

fn max_value() -> f64

Returns the largest finite number this type can represent

impl Clone for f64

fn clone(&self) -> f64

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for f64

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

Formats the value using the given formatter.

impl Default for f64

fn default() -> f64

Returns the default value of 0.0

impl<'de> Deserialize<'de> for f64

fn deserialize<D>( deserializer: D ) -> Result<f64, <D as Deserializer<'de>>::Error>where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Deserialize for f64

fn deserialize<R>(raw: &mut Deserializer<R>) -> Result<f64, Error>where R: BufRead,

method to implement to deserialise an object from the given Deserializer.

impl Display for f64

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

Formats the value using the given formatter.

impl<'a> Div<&'a Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the / operator.

fn div(self, other: &Complex<f64>) -> Complex<f64>

Performs the / operation.

impl Div<&f64> for f64

type Output = <f64 as Div<f64>>::Output

The resulting type after applying the / operator.

fn div(self, other: &f64) -> <f64 as Div<f64>>::Output

Performs the / operation.

impl Div<Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the / operator.

fn div(self, other: Complex<f64>) -> <f64 as Div<Complex<f64>>>::Output

Performs the / operation.

impl Div<f64> for f64

type Output = f64

The resulting type after applying the / operator.

fn div(self, other: f64) -> f64

Performs the / operation.

impl DivAssign<&f64> for f64

fn div_assign(&mut self, other: &f64)

Performs the /= operation.

impl DivAssign<f64> for f64

fn div_assign(&mut self, other: f64)

Performs the /= operation.

impl Euclid for f64

fn div_euclid(&self, v: &f64) -> f64

Calculates Euclidean division, the matching method for rem_euclid.

fn rem_euclid(&self, v: &f64) -> f64

Calculates the least nonnegative remainder of self (mod v).

impl Float for f64

fn nan() -> f64

Returns the NaN value.

fn infinity() -> f64

Returns the infinite value.

fn neg_infinity() -> f64

Returns the negative infinite value.

fn neg_zero() -> f64

Returns -0.0.

fn min_value() -> f64

Returns the smallest finite value that this type can represent.

fn min_positive_value() -> f64

Returns the smallest positive, normalized value that this type can represent.

fn epsilon() -> f64

Returns epsilon, a small positive value.

fn max_value() -> f64

Returns the largest finite value that this type can represent.

fn abs_sub(self, other: f64) -> f64

The positive difference of two numbers.

fn integer_decode(self) -> (u64, i16, i8)

Returns the mantissa, base 2 exponent, and sign as integers, respectively. The original number can be recovered by sign * mantissa * 2 ^ exponent.

fn is_nan(self) -> bool

Returns true if this value is NaN and false otherwise.

fn is_infinite(self) -> bool

Returns true if this value is positive infinity or negative infinity and false otherwise.

fn is_finite(self) -> bool

Returns true if this number is neither infinite nor NaN.

fn is_normal(self) -> bool

Returns true if the number is neither zero, infinite, subnormal, or NaN.

fn classify(self) -> FpCategory

Returns the floating point category of the number. If only one property is going to be tested, it is generally faster to use the specific predicate instead.

fn floor(self) -> f64

Returns the largest integer less than or equal to a number.

fn ceil(self) -> f64

Returns the smallest integer greater than or equal to a number.

fn round(self) -> f64

Returns the nearest integer to a number. Round half-way cases away from 0.0.

fn trunc(self) -> f64

Return the integer part of a number.

fn fract(self) -> f64

Returns the fractional part of a number.

fn abs(self) -> f64

Computes the absolute value of self. Returns Float::nan() if the number is Float::nan().

fn signum(self) -> f64

Returns a number that represents the sign of self.

fn is_sign_positive(self) -> bool

Returns true if self is positive, including +0.0, Float::infinity(), and Float::nan().

fn is_sign_negative(self) -> bool

Returns true if self is negative, including -0.0, Float::neg_infinity(), and -Float::nan().

fn mul_add(self, a: f64, b: f64) -> f64

Fused multiply-add. Computes (self * a) + b with only one rounding error, yielding a more accurate result than an unfused multiply-add.

fn recip(self) -> f64

Take the reciprocal (inverse) of a number, 1/x.

fn powi(self, n: i32) -> f64

Raise a number to an integer power.

fn powf(self, n: f64) -> f64

Raise a number to a floating point power.

fn sqrt(self) -> f64

Take the square root of a number.

fn exp(self) -> f64

Returns e^(self), (the exponential function).

fn exp2(self) -> f64

Returns 2^(self).

fn ln(self) -> f64

Returns the natural logarithm of the number.

fn log(self, base: f64) -> f64

Returns the logarithm of the number with respect to an arbitrary base.

fn log2(self) -> f64

Returns the base 2 logarithm of the number.

fn log10(self) -> f64

Returns the base 10 logarithm of the number.

fn to_degrees(self) -> f64

Converts radians to degrees.

fn to_radians(self) -> f64

Converts degrees to radians.

fn max(self, other: f64) -> f64

Returns the maximum of the two numbers.

fn min(self, other: f64) -> f64

Returns the minimum of the two numbers.

fn cbrt(self) -> f64

Take the cubic root of a number.

fn hypot(self, other: f64) -> f64

Calculate the length of the hypotenuse of a right-angle triangle given legs of length x and y.

fn sin(self) -> f64

Computes the sine of a number (in radians).

fn cos(self) -> f64

Computes the cosine of a number (in radians).

fn tan(self) -> f64

Computes the tangent of a number (in radians).

fn asin(self) -> f64

Computes the arcsine of a number. Return value is in radians in the range [-pi/2, pi/2] or NaN if the number is outside the range [-1, 1].

fn acos(self) -> f64

Computes the arccosine of a number. Return value is in radians in the range [0, pi] or NaN if the number is outside the range [-1, 1].

fn atan(self) -> f64

Computes the arctangent of a number. Return value is in radians in the range [-pi/2, pi/2];

fn atan2(self, other: f64) -> f64

Computes the four quadrant arctangent of self (y) and other (x).

fn sin_cos(self) -> (f64, f64)

Simultaneously computes the sine and cosine of the number, x. Returns (sin(x), cos(x)).

fn exp_m1(self) -> f64

Returns e^(self) - 1 in a way that is accurate even if the number is close to zero.

fn ln_1p(self) -> f64

Returns ln(1+n) (natural logarithm) more accurately than if the operations were performed separately.

fn sinh(self) -> f64

Hyperbolic sine function.

fn cosh(self) -> f64

Hyperbolic cosine function.

fn tanh(self) -> f64

Hyperbolic tangent function.

fn asinh(self) -> f64

Inverse hyperbolic sine function.

fn acosh(self) -> f64

Inverse hyperbolic cosine function.

fn atanh(self) -> f64

Inverse hyperbolic tangent function.

fn copysign(self, sign: f64) -> f64

Returns a number composed of the magnitude of self and the sign of sign.

fn is_subnormal(self) -> bool

Returns true if the number is subnormal.

impl FloatConst for f64

fn E() -> f64

Return Euler’s number.

fn FRAC_1_PI() -> f64

Return 1.0 / π.

fn FRAC_1_SQRT_2() -> f64

Return 1.0 / sqrt(2.0).

fn FRAC_2_PI() -> f64

Return 2.0 / π.

fn FRAC_2_SQRT_PI() -> f64

Return 2.0 / sqrt(π).

fn FRAC_PI_2() -> f64

Return π / 2.0.

fn FRAC_PI_3() -> f64

Return π / 3.0.

fn FRAC_PI_4() -> f64

Return π / 4.0.

fn FRAC_PI_6() -> f64

Return π / 6.0.

fn FRAC_PI_8() -> f64

Return π / 8.0.

fn LN_10() -> f64

Return ln(10.0).

fn LN_2() -> f64

Return ln(2.0).

fn LOG10_E() -> f64

Return log10(e).

fn LOG2_E() -> f64

Return log2(e).

fn PI() -> f64

Return Archimedes’ constant π.

fn SQRT_2() -> f64

Return sqrt(2.0).

fn TAU() -> f64

Return the full circle constant τ.

fn LOG10_2() -> f64

Return log10(2.0).

fn LOG2_10() -> f64

Return log2(10.0).

impl FloatCore for f64

fn infinity() -> f64

Returns positive infinity.

fn neg_infinity() -> f64

Returns negative infinity.

fn nan() -> f64

Returns NaN.

fn neg_zero() -> f64

Returns -0.0.

fn min_value() -> f64

Returns the smallest finite value that this type can represent.

fn min_positive_value() -> f64

Returns the smallest positive, normalized value that this type can represent.

fn epsilon() -> f64

Returns epsilon, a small positive value.

fn max_value() -> f64

Returns the largest finite value that this type can represent.

fn integer_decode(self) -> (u64, i16, i8)

Returns the mantissa, base 2 exponent, and sign as integers, respectively. The original number can be recovered by sign * mantissa * 2 ^ exponent.

fn is_nan(self) -> bool

Returns true if the number is NaN.

fn is_infinite(self) -> bool

Returns true if the number is infinite.

fn is_finite(self) -> bool

Returns true if the number is neither infinite or NaN.

fn is_normal(self) -> bool

Returns true if the number is neither zero, infinite, subnormal or NaN.

fn classify(self) -> FpCategory

Returns the floating point category of the number. If only one property is going to be tested, it is generally faster to use the specific predicate instead.

fn is_sign_positive(self) -> bool

Returns true if self is positive, including +0.0 and FloatCore::infinity(), and FloatCore::nan().

fn is_sign_negative(self) -> bool

Returns true if self is negative, including -0.0 and FloatCore::neg_infinity(), and -FloatCore::nan().

fn min(self, other: f64) -> f64

Returns the minimum of the two numbers.

fn max(self, other: f64) -> f64

Returns the maximum of the two numbers.

fn recip(self) -> f64

Returns the reciprocal (multiplicative inverse) of the number.

fn to_degrees(self) -> f64

Converts to degrees, assuming the number is in radians.

fn to_radians(self) -> f64

Converts to radians, assuming the number is in degrees.

fn is_subnormal(self) -> bool

Returns true if the number is subnormal.

fn floor(self) -> f64

Returns the largest integer less than or equal to a number.

fn ceil(self) -> f64

Returns the smallest integer greater than or equal to a number.

fn round(self) -> f64

Returns the nearest integer to a number. Round half-way cases away from 0.0.

fn trunc(self) -> f64

Return the integer part of a number.

fn fract(self) -> f64

Returns the fractional part of a number.

fn abs(self) -> f64

Computes the absolute value of self. Returns FloatCore::nan() if the number is FloatCore::nan().

fn signum(self) -> f64

Returns a number that represents the sign of self.

fn powi(self, n: i32) -> f64

Raise a number to an integer power.

impl From<ActiveSlotsCoeff> for f64

fn from(coeff: ActiveSlotsCoeff) -> f64

Converts to this type from the input type.

impl From<F64U> for f64

fn from(x: F64U) -> f64

Converts to this type from the input type.

impl From<Number> for f64

fn from(num: Number) -> f64

Converts to this type from the input type.

impl From<Probability> for f64

fn from(p: Probability) -> f64

Converts to this type from the input type.

impl From<bool> for f64

fn from(small: bool) -> f64

Converts bool to f64 losslessly. The resulting value is positive 0.0 for false and 1.0 for true values.

Examples

let x: f64 = false.into();
assert_eq!(x, 0.0);
assert!(x.is_sign_positive());

let y: f64 = true.into();
assert_eq!(y, 1.0);

impl From<f32> for f64

fn from(small: f32) -> f64

Converts f32 to f64 losslessly.

impl From<i16> for f64

fn from(small: i16) -> f64

Converts i16 to f64 losslessly.

impl From<i32> for f64

fn from(small: i32) -> f64

Converts i32 to f64 losslessly.

impl From<i8> for f64

fn from(small: i8) -> f64

Converts i8 to f64 losslessly.

impl From<u16> for f64

fn from(small: u16) -> f64

Converts u16 to f64 losslessly.

impl From<u32> for f64

fn from(small: u32) -> f64

Converts u32 to f64 losslessly.

impl From<u8> for f64

fn from(small: u8) -> f64

Converts u8 to f64 losslessly.

impl FromBytes for f64

fn ref_from(bytes: &[u8]) -> Option<&Self>where Self: Sized,

Interprets the given bytes as a &Self without copying.

fn ref_from_prefix(bytes: &[u8]) -> Option<&Self>where Self: Sized,

Interprets the prefix of the given bytes as a &Self without copying.

fn ref_from_suffix(bytes: &[u8]) -> Option<&Self>where Self: Sized,

Interprets the suffix of the given bytes as a &Self without copying.

fn mut_from(bytes: &mut [u8]) -> Option<&mut Self>where Self: Sized + AsBytes,

Interprets the given bytes as a &mut Self without copying.

fn mut_from_prefix(bytes: &mut [u8]) -> Option<&mut Self>where Self: Sized + AsBytes,

Interprets the prefix of the given bytes as a &mut Self without copying.

fn mut_from_suffix(bytes: &mut [u8]) -> Option<&mut Self>where Self: Sized + AsBytes,

Interprets the suffix of the given bytes as a &mut Self without copying.

fn slice_from(bytes: &[u8]) -> Option<&[Self]>where Self: Sized,

Interprets the given bytes as a &[Self] without copying.

fn slice_from_prefix(bytes: &[u8], count: usize) -> Option<(&[Self], &[u8])>where Self: Sized,

Interprets the prefix of the given bytes as a &[Self] with length equal to count without copying.

fn slice_from_suffix(bytes: &[u8], count: usize) -> Option<(&[u8], &[Self])>where Self: Sized,

Interprets the suffix of the given bytes as a &[Self] with length equal to count without copying.

fn mut_slice_from(bytes: &mut [u8]) -> Option<&mut [Self]>where Self: Sized + AsBytes,

Interprets the given bytes as a &mut [Self] without copying.

fn mut_slice_from_prefix( bytes: &mut [u8], count: usize ) -> Option<(&mut [Self], &mut [u8])>where Self: Sized + AsBytes,

Interprets the prefix of the given bytes as a &mut [Self] with length equal to count without copying.

fn mut_slice_from_suffix( bytes: &mut [u8], count: usize ) -> Option<(&mut [u8], &mut [Self])>where Self: Sized + AsBytes,

Interprets the suffix of the given bytes as a &mut [Self] with length equal to count without copying.

fn read_from(bytes: &[u8]) -> Option<Self>where Self: Sized,

Reads a copy of Self from bytes.

fn read_from_prefix(bytes: &[u8]) -> Option<Self>where Self: Sized,

Reads a copy of Self from the prefix of bytes.

fn read_from_suffix(bytes: &[u8]) -> Option<Self>where Self: Sized,

Reads a copy of Self from the suffix of bytes.

impl FromBytes for f64

type Bytes = [u8; 8]

fn from_be_bytes(bytes: &<f64 as FromBytes>::Bytes) -> f64

Create a number from its representation as a byte array in big endian.

fn from_le_bytes(bytes: &<f64 as FromBytes>::Bytes) -> f64

Create a number from its representation as a byte array in little endian.

fn from_ne_bytes(bytes: &<f64 as FromBytes>::Bytes) -> f64

Create a number from its memory representation as a byte array in native endianness.

impl FromPrimitive for f64

fn from_isize(n: isize) -> Option<f64>

Converts an isize to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i8(n: i8) -> Option<f64>

Converts an i8 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i16(n: i16) -> Option<f64>

Converts an i16 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i32(n: i32) -> Option<f64>

Converts an i32 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i64(n: i64) -> Option<f64>

Converts an i64 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_i128(n: i128) -> Option<f64>

Converts an i128 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_usize(n: usize) -> Option<f64>

Converts a usize to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u8(n: u8) -> Option<f64>

Converts an u8 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u16(n: u16) -> Option<f64>

Converts an u16 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u32(n: u32) -> Option<f64>

Converts an u32 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u64(n: u64) -> Option<f64>

Converts an u64 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_u128(n: u128) -> Option<f64>

Converts an u128 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_f32(n: f32) -> Option<f64>

Converts a f32 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

fn from_f64(n: f64) -> Option<f64>

Converts a f64 to return an optional value of this type. If the value cannot be represented by this type, then None is returned.

impl<'a> FromSql<'a> for f64

fn from_sql( _: &Type, raw: &'a [u8] ) -> Result<f64, Box<dyn Error + Sync + Send, Global>>

Creates a new value of this type from a buffer of data of the specified Postgres Type in its binary format.

fn accepts(ty: &Type) -> bool

Determines if a value of this type can be created from the specified Postgres Type.

fn from_sql_null( ty: &Type ) -> Result<Self, Box<dyn Error + Sync + Send, Global>>

Creates a new value of this type from a NULL SQL value.

fn from_sql_nullable( ty: &Type, raw: Option<&'a [u8]> ) -> Result<Self, Box<dyn Error + Sync + Send, Global>>

A convenience function that delegates to from_sql and from_sql_null depending on the value of raw.

impl<DB> FromSql<Double, DB> for f64where DB: Backend<RawValue = [u8]>,

fn from_sql( bytes: Option<&[u8]> ) -> Result<f64, Box<dyn Error + Sync + Send, Global>>

See the trait documentation.

impl FromSql<Double, Sqlite> for f64

fn from_sql( value: Option<&SqliteValue> ) -> Result<f64, Box<dyn Error + Sync + Send, Global>>

See the trait documentation.

impl<__ST, __DB> FromSqlRow<__ST, __DB> for f64where __DB: Backend, f64: FromSql<__ST, __DB>,

fn build_from_row<R>( row: &mut R ) -> Result<f64, Box<dyn Error + Sync + Send, Global>>where R: Row<__DB>,

See the trait documentation.

const FIELDS_NEEDED: usize = 1usize

The number of fields that this type will consume. Must be equal to the number of times you would call row.take() in build_from_row

impl FromStr for f64

fn from_str(src: &str) -> Result<f64, ParseFloatError>

Converts a string in base 10 to a float. Accepts an optional decimal exponent.

This function accepts strings such as

• ‘3.14’
• ‘-3.14’
• ‘2.5E10’, or equivalently, ‘2.5e10’
• ‘2.5E-10’
• ‘5.’
• ‘.5’, or, equivalently, ‘0.5’
• ‘inf’, ‘-inf’, ‘+infinity’, ‘NaN’

Note that alphabetical characters are not case-sensitive.

Leading and trailing whitespace represent an error.

Grammar

All strings that adhere to the following EBNF grammar when lowercased will result in an Ok being returned:

Float  ::= Sign? ( 'inf' | 'infinity' | 'nan' | Number )
Number ::= ( Digit+ |
             Digit+ '.' Digit* |
             Digit* '.' Digit+ ) Exp?
Exp    ::= 'e' Sign? Digit+
Sign   ::= [+-]
Digit  ::= [0-9]

Arguments

• src - A string

Return value

Err(ParseFloatError) if the string did not represent a valid number. Otherwise, Ok(n) where n is the closest representable floating-point number to the number represented by src (following the same rules for rounding as for the results of primitive operations).

type Err = ParseFloatError

The associated error which can be returned from parsing.

impl FromValue<f64> for f64

fn from_value(val: &Value) -> Option<f64>

Tries to retrieve f64 from Value.

Examples:

use gtmpl_value::{FromValue, Value};

let v: Value = 23.1f64.into();
let i = f64::from_value(&v);
assert_eq!(i, Some(23.1f64));

impl FromZeroes for f64

fn zero(&mut self)

Overwrites self with zeroes.

fn new_zeroed() -> Selfwhere Self: Sized,

Creates an instance of Self from zeroed bytes.

impl IntervalDsl for f64

fn microseconds(self) -> PgInterval

Returns a PgInterval representing self as microseconds

fn days(self) -> PgInterval

Returns a PgInterval representing self in days

fn months(self) -> PgInterval

Returns a PgInterval representing self in months

fn years(self) -> PgInterval

Returns a PgInterval representing self in weeks

fn milliseconds(self) -> PgInterval

Returns a PgInterval representing self as milliseconds

fn seconds(self) -> PgInterval

Returns a PgInterval representing self as seconds

fn minutes(self) -> PgInterval

Returns a PgInterval representing self as minutes

fn hours(self) -> PgInterval

Returns a PgInterval representing self as hours

fn weeks(self) -> PgInterval

Returns a PgInterval representing self in weeks

fn microsecond(self) -> PgInterval

Identical to microseconds

fn millisecond(self) -> PgInterval

Identical to milliseconds

fn second(self) -> PgInterval

Identical to seconds

fn minute(self) -> PgInterval

Identical to minutes

fn hour(self) -> PgInterval

Identical to hours

fn day(self) -> PgInterval

Identical to days

fn week(self) -> PgInterval

Identical to weeks

fn month(self) -> PgInterval

Identical to months

fn year(self) -> PgInterval

Identical to years

impl<'de, E> IntoDeserializer<'de, E> for f64where E: Error,

type Deserializer = F64Deserializer<E>

The type of the deserializer being converted into.

fn into_deserializer(self) -> F64Deserializer<E>

Convert this value into a deserializer.

impl Inv for f64

type Output = f64

The result after applying the operator.

fn inv(self) -> f64

Returns the multiplicative inverse of self.

impl LowerExp for f64

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

Formats the value using the given formatter.

impl Message for f64

google.protobuf.DoubleValue

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError>where B: BufMut, Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8, Global> where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError>where B: BufMut, Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8, Global> where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode<B>(buf: B) -> Result<Self, DecodeError>where B: Buf, Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError>where B: Buf, Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError>where B: Buf, Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError>where B: Buf, Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl<'a> Mul<&'a Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the * operator.

fn mul(self, other: &Complex<f64>) -> Complex<f64>

Performs the * operation.

impl Mul<&f64> for f64

type Output = <f64 as Mul<f64>>::Output

The resulting type after applying the * operator.

fn mul(self, other: &f64) -> <f64 as Mul<f64>>::Output

Performs the * operation.

impl Mul<Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the * operator.

fn mul(self, other: Complex<f64>) -> <f64 as Mul<Complex<f64>>>::Output

Performs the * operation.

impl Mul<Duration> for f64

type Output = Duration

The resulting type after applying the * operator.

fn mul(self, rhs: Duration) -> <f64 as Mul<Duration>>::Output

Performs the * operation.

impl Mul<Unit> for f64

type Output = f64

The resulting type after applying the * operator.

fn mul(self, other: Unit) -> <f64 as Mul<Unit>>::Output

Performs the * operation.

impl Mul<f64> for f64

type Output = f64

The resulting type after applying the * operator.

fn mul(self, other: f64) -> f64

Performs the * operation.

impl MulAdd<f64, f64> for f64

type Output = f64

The resulting type after applying the fused multiply-add.

fn mul_add(self, a: f64, b: f64) -> <f64 as MulAdd<f64, f64>>::Output

Performs the fused multiply-add operation (self * a) + b

impl MulAddAssign<f64, f64> for f64

fn mul_add_assign(&mut self, a: f64, b: f64)

Performs the fused multiply-add assignment operation *self = (*self * a) + b

impl MulAssign<&f64> for f64

fn mul_assign(&mut self, other: &f64)

Performs the *= operation.

impl MulAssign<f64> for f64

fn mul_assign(&mut self, other: f64)

Performs the *= operation.

impl Neg for f64

type Output = f64

The resulting type after applying the - operator.

fn neg(self) -> f64

Performs the unary - operation.

impl Num for f64

type FromStrRadixErr = ParseFloatError

fn from_str_radix( src: &str, radix: u32 ) -> Result<f64, <f64 as Num>::FromStrRadixErr>

Convert from a string and radix (typically 2..=36).

impl NumCast for f64

fn from<N>(n: N) -> Option<f64>where N: ToPrimitive,

Creates a number from another value that can be converted into a primitive via the ToPrimitive trait. If the source value cannot be represented by the target type, then None is returned.

impl NumericalDuration for f64

fn nanoseconds(self) -> Duration

Create a [Duration] from the number of nanoseconds.

fn microseconds(self) -> Duration

Create a [Duration] from the number of microseconds.

fn milliseconds(self) -> Duration

Create a [Duration] from the number of milliseconds.

fn seconds(self) -> Duration

Create a [Duration] from the number of seconds.

fn minutes(self) -> Duration

Create a [Duration] from the number of minutes.

fn hours(self) -> Duration

Create a [Duration] from the number of hours.

fn days(self) -> Duration

Create a [Duration] from the number of days.

fn weeks(self) -> Duration

Create a [Duration] from the number of weeks.

impl NumericalStdDuration for f64

fn std_nanoseconds(self) -> Duration

Create a std::time::Duration from the number of nanoseconds.

fn std_microseconds(self) -> Duration

Create a std::time::Duration from the number of microseconds.

fn std_milliseconds(self) -> Duration

Create a std::time::Duration from the number of milliseconds.

fn std_seconds(self) -> Duration

Create a std::time::Duration from the number of seconds.

fn std_minutes(self) -> Duration

Create a std::time::Duration from the number of minutes.

fn std_hours(self) -> Duration

Create a std::time::Duration from the number of hours.

fn std_days(self) -> Duration

Create a std::time::Duration from the number of days.

fn std_weeks(self) -> Duration

Create a std::time::Duration from the number of weeks.

impl One for f64

fn one() -> f64

Returns the multiplicative identity element of Self, 1.

fn is_one(&self) -> bool

Returns true if self is equal to the multiplicative identity.

fn set_one(&mut self)

Sets self to the multiplicative identity element of Self, 1.

impl PartialEq<FullF64> for f64

fn eq(&self, rhs: &FullF64) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq<JsonValue> for f64

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq<Number> for f64

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq<Value> for f64

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq<Value> for f64

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq<f64> for f64

fn eq(&self, other: &f64) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &f64) -> bool

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

impl PartialOrd<f64> for f64

fn partial_cmp(&self, other: &f64) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &f64) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &f64) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn ge(&self, other: &f64) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

fn gt(&self, other: &f64) -> bool

This method tests greater than (for self and other) and is used by the > operator.

impl<'a> Pow<&'a f32> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: &'a f32) -> f64

Returns self to the power rhs.

impl<'a> Pow<&'a f64> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: &'a f64) -> f64

Returns self to the power rhs.

impl<'a> Pow<&'a i16> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: &'a i16) -> f64

Returns self to the power rhs.

impl<'a> Pow<&'a i32> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: &'a i32) -> f64

Returns self to the power rhs.

impl<'a> Pow<&'a i8> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: &'a i8) -> f64

Returns self to the power rhs.

impl<'a> Pow<&'a u16> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: &'a u16) -> f64

Returns self to the power rhs.

impl<'a> Pow<&'a u8> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: &'a u8) -> f64

Returns self to the power rhs.

impl<U> Pow<NInt<U>> for f64where U: Unsigned + NonZero,

type Output = f64

The result of the exponentiation.

fn powi(self, _: NInt<U>) -> <f64 as Pow<NInt<U>>>::Output

This function isn’t used in this crate, but may be useful for others. It is implemented for primitives.

impl<U> Pow<PInt<U>> for f64where U: Unsigned + NonZero,

type Output = f64

The result of the exponentiation.

fn powi(self, _: PInt<U>) -> <f64 as Pow<PInt<U>>>::Output

This function isn’t used in this crate, but may be useful for others. It is implemented for primitives.

impl<U, B> Pow<UInt<U, B>> for f64where U: Unsigned, B: Bit,

type Output = f64

The result of the exponentiation.

fn powi(self, _: UInt<U, B>) -> <f64 as Pow<UInt<U, B>>>::Output

This function isn’t used in this crate, but may be useful for others. It is implemented for primitives.

impl Pow<UTerm> for f64

type Output = f64

The result of the exponentiation.

fn powi(self, _: UTerm) -> <f64 as Pow<UTerm>>::Output

This function isn’t used in this crate, but may be useful for others. It is implemented for primitives.

impl Pow<Z0> for f64

type Output = f64

The result of the exponentiation.

fn powi(self, _: Z0) -> <f64 as Pow<Z0>>::Output

This function isn’t used in this crate, but may be useful for others. It is implemented for primitives.

impl Pow<f32> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: f32) -> f64

Returns self to the power rhs.

impl Pow<f64> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: f64) -> f64

Returns self to the power rhs.

impl Pow<i16> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: i16) -> f64

Returns self to the power rhs.

impl Pow<i32> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: i32) -> f64

Returns self to the power rhs.

impl Pow<i8> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: i8) -> f64

Returns self to the power rhs.

impl Pow<u16> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: u16) -> f64

Returns self to the power rhs.

impl Pow<u8> for f64

type Output = f64

The result after applying the operator.

fn pow(self, rhs: u8) -> f64

Returns self to the power rhs.

impl<'a> Product<&'a f64> for f64

fn product<I>(iter: I) -> f64where I: Iterator<Item = &'a f64>,

Method which takes an iterator and generates Self from the elements by multiplying the items.

impl Product<f64> for f64

fn product<I>(iter: I) -> f64where I: Iterator<Item = f64>,

Method which takes an iterator and generates Self from the elements by multiplying the items.

impl<__ST, __DB> Queryable<__ST, __DB> for f64where __DB: Backend, f64: FromSql<__ST, __DB>,

type Row = f64

The Rust type you’d like to map from.

fn build(row: <f64 as Queryable<__ST, __DB>>::Row) -> f64

Construct an instance of this type

impl RegexRepresentation for f64

const REGEX: &'static str = _

Matches any floating point number

assert_eq!(f64::REGEX, r"[-+]?\d+\.?\d*");

impl<'a> Rem<&'a Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the % operator.

fn rem(self, other: &Complex<f64>) -> Complex<f64>

Performs the % operation.

impl Rem<&f64> for f64

type Output = <f64 as Rem<f64>>::Output

The resulting type after applying the % operator.

fn rem(self, other: &f64) -> <f64 as Rem<f64>>::Output

Performs the % operation.

impl Rem<Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the % operator.

fn rem(self, other: Complex<f64>) -> <f64 as Rem<Complex<f64>>>::Output

Performs the % operation.

impl Rem<f64> for f64

The remainder from the division of two floats.

The remainder has the same sign as the dividend and is computed as: x - (x / y).trunc() * y.

Examples

let x: f32 = 50.50;
let y: f32 = 8.125;
let remainder = x - (x / y).trunc() * y;

// The answer to both operations is 1.75
assert_eq!(x % y, remainder);

type Output = f64

The resulting type after applying the % operator.

fn rem(self, other: f64) -> f64

Performs the % operation.

impl RemAssign<&f64> for f64

fn rem_assign(&mut self, other: &f64)

Performs the %= operation.

impl RemAssign<f64> for f64

fn rem_assign(&mut self, other: f64)

Performs the %= operation.

impl SampleUniform for f64

type Sampler = UniformFloat<f64>

The UniformSampler implementation supporting type X.

impl SampleUniform for f64

type Sampler = UniformFloat<f64>

The UniformSampler implementation supporting type X.

impl Serialize for f64

fn serialize<S>( &self, serializer: S ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>where S: Serializer,

Serialize this value into the given Serde serializer.

impl Serialize for f64

fn serialize<W, 'a>( &self, serializer: &'a mut Serializer<W> ) -> Result<&'a mut Serializer<W>, Error>where W: Write,

impl Signed for f64

fn abs(&self) -> f64

Computes the absolute value. Returns NAN if the number is NAN.

fn abs_sub(&self, other: &f64) -> f64

The positive difference of two numbers. Returns 0.0 if the number is less than or equal to other, otherwise the difference betweenself and other is returned.

fn signum(&self) -> f64

Returns

• 1.0 if the number is positive, +0.0 or INFINITY
• -1.0 if the number is negative, -0.0 or NEG_INFINITY
• NAN if the number is NaN

fn is_positive(&self) -> bool

Returns true if the number is positive, including +0.0 and INFINITY

fn is_negative(&self) -> bool

Returns true if the number is negative, including -0.0 and NEG_INFINITY

impl SimdElement for f64

type Mask = i64

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

The mask element type corresponding to this element type.

impl<'a> Sub<&'a Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the - operator.

fn sub(self, other: &Complex<f64>) -> Complex<f64>

Performs the - operation.

impl Sub<&f64> for f64

type Output = <f64 as Sub<f64>>::Output

The resulting type after applying the - operator.

fn sub(self, other: &f64) -> <f64 as Sub<f64>>::Output

Performs the - operation.

impl Sub<Complex<f64>> for f64

type Output = Complex<f64>

The resulting type after applying the - operator.

fn sub(self, other: Complex<f64>) -> <f64 as Sub<Complex<f64>>>::Output

Performs the - operation.

impl Sub<f64> for f64

type Output = f64

The resulting type after applying the - operator.

fn sub(self, other: f64) -> f64

Performs the - operation.

impl SubAssign<&f64> for f64

fn sub_assign(&mut self, other: &f64)

Performs the -= operation.

impl SubAssign<f64> for f64

fn sub_assign(&mut self, other: f64)

Performs the -= operation.

impl<'a> Sum<&'a f64> for f64

fn sum<I>(iter: I) -> f64where I: Iterator<Item = &'a f64>,

Method which takes an iterator and generates Self from the elements by “summing up” the items.

impl Sum<f64> for f64

fn sum<I>(iter: I) -> f64where I: Iterator<Item = f64>,

Method which takes an iterator and generates Self from the elements by “summing up” the items.

impl TiffValue for f64

const BYTE_LEN: u32 = 8u32

const FIELD_TYPE: Type = Type::DOUBLE

fn count(&self) -> u32

fn write<W>(&self, writer: &mut TiffWriter<W>) -> Result<(), TiffError>where W: Write,

fn bytes(&self) -> u32

impl ToBigInt for f64

fn to_bigint(&self) -> Option<BigInt>

Converts the value of self to a BigInt.

impl ToBigUint for f64

fn to_biguint(&self) -> Option<BigUint>

Converts the value of self to a BigUint.

impl ToBytes for f64

type Bytes = [u8; 8]

fn to_be_bytes(&self) -> <f64 as ToBytes>::Bytes

Return the memory representation of this number as a byte array in big-endian byte order.

fn to_le_bytes(&self) -> <f64 as ToBytes>::Bytes

Return the memory representation of this number as a byte array in little-endian byte order.

fn to_ne_bytes(&self) -> <f64 as ToBytes>::Bytes

Return the memory representation of this number as a byte array in native byte order.

impl ToPrimitive for f64

fn to_isize(&self) -> Option<isize>

Converts the value of self to an isize. If the value cannot be represented by an isize, then None is returned.

fn to_i8(&self) -> Option<i8>

Converts the value of self to an i8. If the value cannot be represented by an i8, then None is returned.

fn to_i16(&self) -> Option<i16>

Converts the value of self to an i16. If the value cannot be represented by an i16, then None is returned.

fn to_i32(&self) -> Option<i32>

Converts the value of self to an i32. If the value cannot be represented by an i32, then None is returned.

fn to_i64(&self) -> Option<i64>

Converts the value of self to an i64. If the value cannot be represented by an i64, then None is returned.

fn to_i128(&self) -> Option<i128>

Converts the value of self to an i128. If the value cannot be represented by an i128 (i64 under the default implementation), then None is returned.

fn to_usize(&self) -> Option<usize>

Converts the value of self to a usize. If the value cannot be represented by a usize, then None is returned.

fn to_u8(&self) -> Option<u8>

Converts the value of self to a u8. If the value cannot be represented by a u8, then None is returned.

fn to_u16(&self) -> Option<u16>

Converts the value of self to a u16. If the value cannot be represented by a u16, then None is returned.

fn to_u32(&self) -> Option<u32>

Converts the value of self to a u32. If the value cannot be represented by a u32, then None is returned.

fn to_u64(&self) -> Option<u64>

Converts the value of self to a u64. If the value cannot be represented by a u64, then None is returned.

fn to_u128(&self) -> Option<u128>

Converts the value of self to a u128. If the value cannot be represented by a u128 (u64 under the default implementation), then None is returned.

fn to_f32(&self) -> Option<f32>

Converts the value of self to an f32. Overflows may map to positive or negative inifinity, otherwise None is returned if the value cannot be represented by an f32.

fn to_f64(&self) -> Option<f64>

Converts the value of self to an f64. Overflows may map to positive or negative inifinity, otherwise None is returned if the value cannot be represented by an f64.

impl<DB> ToSql<Double, DB> for f64where DB: Backend,

fn to_sql<W>( &self, out: &mut Output<'_, W, DB> ) -> Result<IsNull, Box<dyn Error + Sync + Send, Global>>where W: Write,

See the trait documentation.

impl<__DB> ToSql<Nullable<Double>, __DB> for f64where __DB: Backend, f64: ToSql<Double, __DB>,

fn to_sql<W>( &self, out: &mut Output<'_, W, __DB> ) -> Result<IsNull, Box<dyn Error + Sync + Send, Global>>where W: Write,

See the trait documentation.

impl ToSql for f64

fn to_sql( &self, _: &Type, w: &mut BytesMut ) -> Result<IsNull, Box<dyn Error + Sync + Send, Global>>

Converts the value of self into the binary format of the specified Postgres Type, appending it to out.

fn accepts(ty: &Type) -> bool

Determines if a value of this type can be converted to the specified Postgres Type.

fn to_sql_checked( &self, ty: &Type, out: &mut BytesMut ) -> Result<IsNull, Box<dyn Error + Sync + Send, Global>>

An adaptor method used internally by Rust-Postgres.

fn encode_format(&self, _ty: &Type) -> Format

Specify the encode format

impl TryFrom<Decimal> for f64

Try to convert a Decimal to f64.

Can fail if the Decimal is out of range for f64.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(t: Decimal) -> Result<f64, Error>

Performs the conversion.

impl Ulps for f64

type U = i64

fn ulps(&self, other: &f64) -> i64

The number of representable values or ULPs (Units of Least Precision) that separate self and other. The result U is an integral value, and will be zero if self and other are exactly equal.

fn next(&self) -> f64

The next representable number above this one

fn prev(&self) -> f64

The previous representable number below this one

impl UpperExp for f64

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

Formats the value using the given formatter.

impl Value for f64

fn record(&self, key: &Field, visitor: &mut dyn Visit)

Visits this value with the given Visitor.

impl Weight for f64

const MAX: f64 = 1.7976931348623157E+308f64

Maximum number representable by Self.

const ZERO: f64 = 0f64

Element of Self equivalent to 0.

fn try_from_u32_lossy(n: u32) -> Option<f64>

Produce an instance of Self from a u32 value, or return None if out of range. Loss of precision (where Self is a floating point type) is acceptable.

fn sum(values: &[f64]) -> f64

Sums all values in slice values.

impl Zero for f64

fn zero() -> f64

Returns the additive identity element of Self, 0.

fn is_zero(&self) -> bool

Returns true if self is equal to the additive identity.

fn set_zero(&mut self)

Sets self to the additive identity element of Self, 0.

impl Zeroable for f64

fn zeroed() -> Self

Calls zeroed.

impl Copy for f64

impl DefaultIsZeroes for f64

impl Float for f64

impl FloatToInt<i128> for f64

impl FloatToInt<i16> for f64

impl FloatToInt<i32> for f64

impl FloatToInt<i64> for f64

impl FloatToInt<i8> for f64

impl FloatToInt<isize> for f64

impl FloatToInt<u128> for f64

impl FloatToInt<u16> for f64

impl FloatToInt<u32> for f64

impl FloatToInt<u64> for f64

impl FloatToInt<u8> for f64

impl FloatToInt<usize> for f64

impl Format for f64

Serialize into a f64

impl Pod for f64

impl Primitive for f64

impl SimdCast for f64

impl Weight for f64