pub use educe::Educe;
use ordered_float::OrderedFloat;
use serde::de::{self, IntoDeserializer};
use std::cmp::Ordering;
use std::hash::{Hash, Hasher};
use std::marker::PhantomData;
use std::{fmt, mem};
pub trait DoubleOps {
fn partial_cmp(&self, other: &Self) -> Option<Ordering>;
fn cmp(&self, other: &Self) -> Ordering;
fn eq(&self, other: &Self) -> bool;
fn hash<H>(&self, hasher: &mut H)
where
H: Hasher;
}
impl DoubleOps for f64 {
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
OrderedFloat(*self).partial_cmp(&OrderedFloat(*other))
}
#[inline]
fn cmp(&self, other: &Self) -> Ordering {
OrderedFloat(*self).cmp(&OrderedFloat(*other))
}
#[inline]
fn eq(&self, other: &Self) -> bool {
OrderedFloat(*self) == OrderedFloat(*other)
}
#[inline]
fn hash<H>(&self, hasher: &mut H)
where
H: Hasher,
{
OrderedFloat(*self).hash(hasher)
}
}
impl<T> DoubleOps for Option<T>
where
T: DoubleOps,
{
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
match (self, other) {
(Some(a), Some(b)) => a.partial_cmp(b),
(Some(_), None) => Some(Ordering::Greater),
(None, Some(_)) => Some(Ordering::Less),
(None, None) => Some(Ordering::Equal),
}
}
#[inline]
fn cmp(&self, other: &Self) -> Ordering {
match (self, other) {
(Some(a), Some(b)) => a.cmp(b),
(Some(_), None) => Ordering::Greater,
(None, Some(_)) => Ordering::Less,
(None, None) => Ordering::Equal,
}
}
#[inline]
fn eq(&self, other: &Self) -> bool {
match (self, other) {
(Some(a), Some(b)) => a.eq(b),
(Some(_), None) | (None, Some(_)) => false,
(None, None) => true,
}
}
#[inline]
fn hash<H>(&self, hasher: &mut H)
where
H: Hasher,
{
mem::discriminant(self).hash(hasher);
if let Some(v) = self {
v.hash(hasher);
}
}
}
impl<T> DoubleOps for Vec<T>
where
T: DoubleOps,
{
#[inline]
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
let l = usize::min(self.len(), other.len());
let lhs = &self[..l];
let rhs = &other[..l];
for i in 0..l {
match lhs[i].partial_cmp(&rhs[i]) {
Some(Ordering::Equal) => {}
v => return v,
}
}
self.len().partial_cmp(&other.len())
}
#[inline]
fn cmp(&self, other: &Self) -> Ordering {
let l = usize::min(self.len(), other.len());
let lhs = &self[..l];
let rhs = &other[..l];
for i in 0..l {
match lhs[i].cmp(&rhs[i]) {
Ordering::Equal => {}
v => return v,
}
}
self.len().cmp(&other.len())
}
#[inline]
fn eq(&self, other: &Self) -> bool {
if self.len() != other.len() {
return false;
}
for i in 0..self.len() {
if !self[i].eq(&other[i]) {
return false;
}
}
true
}
#[inline]
fn hash<H>(&self, hasher: &mut H)
where
H: Hasher,
{
self.len().hash(hasher);
for v in self {
v.hash(hasher);
}
}
}
pub fn valid_enum_variant(s: &str) -> bool {
if s.is_empty() {
return false;
}
s.as_bytes()
.iter()
.all(|b| matches!(b, b'A'..=b'Z' | b'0'..=b'9' | b'_'))
}
pub enum UnionField_<T> {
Type,
Value(T),
}
impl<'de, T> de::Deserialize<'de> for UnionField_<T>
where
T: de::Deserialize<'de>,
{
fn deserialize<D>(d: D) -> Result<UnionField_<T>, D::Error>
where
D: de::Deserializer<'de>,
{
d.deserialize_str(UnionFieldVisitor(PhantomData))
}
}
struct UnionFieldVisitor<T>(PhantomData<T>);
impl<'de, T> de::Visitor<'de> for UnionFieldVisitor<T>
where
T: de::Deserialize<'de>,
{
type Value = UnionField_<T>;
fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
fmt.write_str("string")
}
fn visit_str<E>(self, value: &str) -> Result<UnionField_<T>, E>
where
E: de::Error,
{
match value {
"type" => Ok(UnionField_::Type),
value => T::deserialize(value.into_deserializer()).map(UnionField_::Value),
}
}
}
pub struct UnionTypeField_;
impl<'de> de::Deserialize<'de> for UnionTypeField_ {
fn deserialize<D>(d: D) -> Result<UnionTypeField_, D::Error>
where
D: de::Deserializer<'de>,
{
d.deserialize_str(UnionTypeFieldVisitor)
}
}
struct UnionTypeFieldVisitor;
impl<'de> de::Visitor<'de> for UnionTypeFieldVisitor {
type Value = UnionTypeField_;
fn expecting(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
fmt.write_str("type field")
}
fn visit_str<E>(self, value: &str) -> Result<UnionTypeField_, E>
where
E: de::Error,
{
match value {
"type" => Ok(UnionTypeField_),
value => Err(E::invalid_value(de::Unexpected::Str(value), &self)),
}
}
}