fastnum2 0.3.6

fork of Fast decimal numbers library
Documentation 
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use core::fmt::{self, Debug, Display, Formatter, LowerExp, UpperExp};

use crate::decimal::{
    utils,
    dec::format,
    Decimal,
    Notation,
};

impl<const N: usize> Display for Decimal<N> {
    #[inline]
    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
        if self.is_nan() {
            return write!(f, "NaN");
        } else if self.is_infinite() {
            return write!(f, "{}Inf", self.sign());
        }

        let plain;

        use Notation::*;
        match self.ctx.notation() {
            Unspecified => {
                return format::format(
                    self.ctx,
                    self.digits.to_str_radix(10),
                    self.cb.get_scale(),
                    self.sign(),
                    f,
                );
            },
            Scientific => {
                return self.write_scientific_notation(f);
            },
            FullScale => {
                plain = false;
            },
            Plain => {
                plain = true;
            }
        }

        format::format_full_scale(
            plain,
            self.digits.to_str_radix(10),
            self.cb.get_scale(),
            self.sign(),
            f,
        )
    }
}

impl<const N: usize> LowerExp for Decimal<N> {
    #[inline]
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        format::format_exponential(
            self.digits.to_str_radix(10),
            self.cb.get_scale(),
            self.sign(),
            f,
            "e",
        )
    }
}

impl<const N: usize> UpperExp for Decimal<N> {
    #[inline]
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        format::format_exponential(
            self.digits.to_str_radix(10),
            self.cb.get_scale(),
            self.sign(),
            f,
            "E",
        )
    }
}

impl<const N: usize> Debug for Decimal<N> {
    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
        utils::fmt::debug_print(&self.digits, &self.cb, Self::type_name(), f)
    }
}