use serde::{Serialize, Deserialize};
#[derive(Debug, PartialEq, Clone, Copy)]
pub struct Number {
pub(crate) n: NumberKind,
}
impl Serialize for Number {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where S: serde::Serializer {
self.n.serialize(serializer)
}
}
impl<'de> Deserialize<'de> for Number {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where D: serde::Deserializer<'de> {
Ok(Number { n: NumberKind::deserialize(deserializer)? })
}
}
impl Number {
pub fn new(n: impl Into<Number>) -> Self {
n.into()
}
}
impl From<f64> for Number {
fn from(f: f64) -> Self {
Self {
n: NumberKind::Float(f),
}
}
}
impl From<f32> for Number {
fn from(f: f32) -> Self {
Self {
n: NumberKind::Float(f as f64),
}
}
}
macro_rules! impl_from_unsigned {
(
$($ty:ty),*
) => {
$(
impl From<$ty> for Number {
#[inline]
fn from(u: $ty) -> Self {
Number { n: NumberKind::UInt(u as u64) }
}
}
)*
};
}
macro_rules! impl_from_signed {
(
$($ty:ty),*
) => {
$(
impl From<$ty> for Number {
#[inline]
fn from(i: $ty) -> Self {
Number {
n: if i < 0 {
NumberKind::Int(i as i64)
} else {
NumberKind::UInt(i as u64)
}
}
}
}
)*
};
}
impl_from_unsigned!(u8, u16, u32, u64, usize);
impl_from_signed!(i8, i16, i32, i64, isize);
macro_rules! from_num_to_primitive {
(
$($ty:ty),*
) => {
$(
impl From<Number> for $ty {
fn from(num: Number) -> Self {
match num.n {
NumberKind::UInt(u) => u as $ty,
NumberKind::Int(i) => i as $ty,
NumberKind::Float(f) => f as $ty,
}
}
}
)*
};
}
impl std::fmt::Display for Number {
fn fmt(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self.n {
NumberKind::Float(f) => write!(fmt, "{}", f),
NumberKind::Int(i) => write!(fmt, "{}", i),
NumberKind::UInt(u) => write!(fmt, "{}", u),
}
}
}
from_num_to_primitive!(u8, u16, u32, u64, usize, i8, i16, i32, i64, isize, f64, f32);
#[derive(Debug, PartialEq, Clone, Copy, Serialize, Deserialize)]
#[serde(untagged)]
pub enum NumberKind {
Float(f64),
Int(i64),
UInt(u64),
}