Trait UncheckedLn

pub trait UncheckedLn {
    // Required method
    const fn unchecked_ln(self) -> Self;
}

Returns the natural logarithm of self.

Panics

Panics if self is zero or negative.

Required Methods

const fn unchecked_ln(self) -> Self

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl UncheckedLn for Dec19x19

Tests

let trunc = |t: Dec19x19| t.trunc_to(17);
check!( [|t| trunc(Dec19x19::unchecked_ln(t)), |t| Dec19x19::checked_ln(t).map(trunc)] {
    (Dec19x19::MAX) =>  trunc(Dec19x19!(44.280_575_164_226_186_298_3)),
    (Dec19x19!(10)) =>  trunc(Dec19x19!(2.302_585_092_994_045_684_0)),
    (Dec19x19!(100)) => trunc(Dec19x19!(4.605_170_185_988_091_367_8)),
    (Dec19x19!(0.1)) => trunc(Dec19x19!(-2.302_585_092_994_045_683_7)),
    (Dec19x19!(2.718281828459045239)) => Dec19x19!(1),
    (-Dec19x19::SMALLEST_STEP) => FAIL,
});