Trait rocket::mtls::oid::asn1_rs::nom::lib::std::fmt::LowerExp

1.0.0 · source ·
pub trait LowerExp {
    // Required method
    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>;
}
Available on crate feature mtls only.
Expand description

e formatting.

The LowerExp trait should format its output in scientific notation with a lower-case e.

For more information on formatters, see the module-level documentation.

§Examples

Basic usage with f64:

let x = 42.0; // 42.0 is '4.2e1' in scientific notation

assert_eq!(format!("{x:e}"), "4.2e1");

Implementing LowerExp on a type:

use std::fmt;

struct Length(i32);

impl fmt::LowerExp for Length {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let val = f64::from(self.0);
        fmt::LowerExp::fmt(&val, f) // delegate to f64's implementation
    }
}

let l = Length(100);

assert_eq!(
    format!("l in scientific notation is: {l:e}"),
    "l in scientific notation is: 1e2"
);

assert_eq!(
    format!("l in scientific notation is: {l:05e}"),
    "l in scientific notation is: 001e2"
);

Required Methods§

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

Formats the value using the given formatter.

Implementors§

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impl LowerExp for f32

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impl LowerExp for f64

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impl LowerExp for i8

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impl LowerExp for i16

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impl LowerExp for i32

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impl LowerExp for i64

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impl LowerExp for i128

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impl LowerExp for isize

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impl LowerExp for u8

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impl LowerExp for u16

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impl LowerExp for u32

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impl LowerExp for u64

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impl LowerExp for u128

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impl LowerExp for usize

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impl<T> LowerExp for &T
where T: LowerExp + ?Sized,

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impl<T> LowerExp for &mut T
where T: LowerExp + ?Sized,

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impl<T> LowerExp for Painted<T>
where T: LowerExp,

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impl<const MIN: i8, const MAX: i8> LowerExp for RangedI8<MIN, MAX>

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impl<const MIN: i16, const MAX: i16> LowerExp for RangedI16<MIN, MAX>

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impl<const MIN: i32, const MAX: i32> LowerExp for RangedI32<MIN, MAX>

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impl<const MIN: i64, const MAX: i64> LowerExp for RangedI64<MIN, MAX>

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impl<const MIN: i128, const MAX: i128> LowerExp for RangedI128<MIN, MAX>

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impl<const MIN: isize, const MAX: isize> LowerExp for RangedIsize<MIN, MAX>

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impl<const MIN: u8, const MAX: u8> LowerExp for RangedU8<MIN, MAX>

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impl<const MIN: u16, const MAX: u16> LowerExp for RangedU16<MIN, MAX>

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impl<const MIN: u32, const MAX: u32> LowerExp for RangedU32<MIN, MAX>

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impl<const MIN: u64, const MAX: u64> LowerExp for RangedU64<MIN, MAX>

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impl<const MIN: u128, const MAX: u128> LowerExp for RangedU128<MIN, MAX>

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impl<const MIN: usize, const MAX: usize> LowerExp for RangedUsize<MIN, MAX>