Struct RetryDelayFactor

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pub struct RetryDelayFactor(/* private fields */);

Expand description

The factor the previous retry is multiplied by. This is actually what makes it exponentially when greater than 1.0. Default is 1.5.

Implementations§

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impl RetryDelayFactor

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pub fn into_inner(self) -> f64

Returns the inner representation

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impl RetryDelayFactor

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pub const ENV_TYPE_NAME: &'static str

The default name of the environment variable for this type.

The name of the environment variable is “ RETRY_DELAY_FACTOR “

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pub fn try_from_env() -> Result<Option<Self>, Error>

Initialize from the environment. Returns None if the value was not found and fails if the value could not be parsed. The name of the environment variable is “CONDOW_ RETRY_DELAY_FACTOR “

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pub fn try_from_env_prefixed<T: Into<String>>( prefix: T, ) -> Result<Option<Self>, Error>

Initialize from the environment. Returns None if the value was not found and fails if the value could not be parsed. The name of the environment variable is “prefix_ RETRY_DELAY_FACTOR “

The underscore and prefix will be omitted if prefix is empty.

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pub fn try_from_env_named<T: AsRef<str>>( var_name: T, ) -> Result<Option<Self>, Error>

Initialize from the environment. Returns None if the value was not found and fails if the value could not be parsed. The name of the environment variable is var_name.

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pub fn try_from_env_type_name() -> Result<Option<Self>, Error>

Initialize from the environment. Returns None if the value was not found and fails if the value could not be parsed. The name of the environment variable is “ RETRY_DELAY_FACTOR “

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pub fn from_env() -> Result<Self, Error>

Initialize from the environment. Fails if the value was not found or if the value could not be parsed. The name of the environment variable is “CONDOW_ RETRY_DELAY_FACTOR “

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pub fn from_env_prefixed<T: Into<String>>(prefix: T) -> Result<Self, Error>

Initialize from the environment. Fails if the value was not found or if the value could not be parsed. The name of the environment variable is “prefix_ RETRY_DELAY_FACTOR “

The underscore and prefix will be omitted if prefix is empty.

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pub fn from_env_named<T: AsRef<str>>(var_name: T) -> Result<Self, Error>

Initialize from the environment. Fails if the value was not found or if the value could not be parsed. The name of the environment variable is var_name.

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pub fn from_env_type_name() -> Result<Self, Error>

Initialize from the environment. Fails if the value was not found or if the value could not be parsed. The name of the environment variable is “ RETRY_DELAY_FACTOR “

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pub fn from_env_opt() -> Option<Self>

Initialize from the environment. Returns None if the value could not be read for any reason. The name of the environment variable is “CONDOW_ RETRY_DELAY_FACTOR “

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pub fn from_env_opt_prefixed<T: Into<String>>(prefix: T) -> Option<Self>

Initialize from the environment. Returns None if the value could not be read for any reason. The name of the environment variable is “prefix_ RETRY_DELAY_FACTOR “

The underscore and prefix will be omitted if prefix is empty.

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pub fn from_env_opt_named<T: AsRef<str>>(var_name: T) -> Option<Self>

Initialize from the environment. Returns None if the value could not be read for any reason. The name of the environment variable is var_name.

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pub fn from_env_opt_type_name() -> Option<Self>

Initialize from the environment. Returns None if the value could not be read for any reason. The name of the environment variable is “ RETRY_DELAY_FACTOR “

Methods from Deref<Target = f64>§

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pub const RADIX: u32 = 2u32

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pub const MANTISSA_DIGITS: u32 = 53u32

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pub const DIGITS: u32 = 15u32

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pub const EPSILON: f64 = 2.2204460492503131E-16f64

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

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pub const MIN_POSITIVE: f64 = 2.2250738585072014E-308f64

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pub const MAX: f64 = 1.7976931348623157E+308f64

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pub const MIN_EXP: i32 = -1_021i32

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pub const MAX_EXP: i32 = 1_024i32

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pub const MIN_10_EXP: i32 = -307i32

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pub const MAX_10_EXP: i32 = 308i32

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pub const NAN: f64 = NaN_f64

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pub const INFINITY: f64 = +Inf_f64

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pub const NEG_INFINITY: f64 = -Inf_f64

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

Returns 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));

// `f64::NAN` could be positive or negative, which will affect the sort order.
if f64::NAN.is_sign_negative() {
    assert!(bois.into_iter().map(|b| b.weight)
        .zip([f64::NAN, -5.0, 0.1, 10.0, 99.0, f64::INFINITY].iter())
        .all(|(a, b)| a.to_bits() == b.to_bits()))
} else {
    assert!(bois.into_iter().map(|b| b.weight)
        .zip([-5.0, 0.1, 10.0, 99.0, f64::INFINITY, f64::NAN].iter())
        .all(|(a, b)| a.to_bits() == b.to_bits()))
}