use std::fmt::Formatter;
use serde::ser::SerializeTupleStruct;
use serde::{
Deserialize, Deserializer, Serialize, Serializer, de, forward_to_deserialize_any, ser,
};
use crate::{Decimal, Error};
impl<'de> Deserialize<'de> for Decimal {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
struct DecimalVisitor;
impl<'de> de::Visitor<'de> for DecimalVisitor {
type Value = Decimal;
fn expecting(&self, formatter: &mut Formatter) -> std::fmt::Result {
formatter.write_str("expecting String or tuple")
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
Decimal::from_string(v).map_err(|e| E::custom(e))
}
fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
where
E: de::Error,
{
Decimal::from_string(&v).map_err(|e| E::custom(e))
}
fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
where
A: de::SeqAccess<'de>,
{
let e = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(0, &self))?;
let m = seq
.next_element()?
.ok_or_else(|| de::Error::invalid_length(1, &self))?;
Ok(Decimal::new(e, m))
}
}
deserializer.deserialize_tuple_struct("Decimal", 2, DecimalVisitor)
}
}
impl<'de> de::SeqAccess<'de> for Decimal {
type Error = Error;
fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error>
where
T: de::DeserializeSeed<'de>,
{
seed.deserialize(&mut *self).map(Some)
}
}
impl<'de> Deserializer<'de> for &mut Decimal {
type Error = Error;
fn deserialize_any<V>(self, _visitor: V) -> Result<V::Value, Self::Error>
where
V: de::Visitor<'de>,
{
Err(Error::Static(
"Decimal: unsupported deserialize_*".to_string(),
))
}
forward_to_deserialize_any! {
bool i8 i16 u8 u16 u32 u64 f32 f64 char str string
bytes byte_buf option unit unit_struct newtype_struct
seq tuple tuple_struct map struct enum identifier ignored_any
}
fn deserialize_i32<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: de::Visitor<'de>,
{
visitor.visit_i32(self.exponent)
}
fn deserialize_i64<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where
V: de::Visitor<'de>,
{
visitor.visit_i64(self.mantissa)
}
}
impl Serialize for Decimal {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut seq = serializer.serialize_tuple_struct("Decimal", 2)?;
seq.serialize_field(&self.exponent)?;
seq.serialize_field(&self.mantissa)?;
seq.end()
}
}
impl Serializer for &mut Decimal {
type Ok = ();
type Error = Error;
type SerializeSeq = Self;
type SerializeTuple = Self;
type SerializeTupleStruct = Self;
type SerializeTupleVariant = Self;
type SerializeMap = Self;
type SerializeStruct = Self;
type SerializeStructVariant = Self;
fn serialize_bool(self, _v: bool) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_i8(self, _v: i8) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_i16(self, _v: i16) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
self.exponent = v;
Ok(())
}
fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
self.mantissa = v;
Ok(())
}
fn serialize_u8(self, _v: u8) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_u16(self, _v: u16) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_u32(self, _v: u32) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_u64(self, _v: u64) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_f32(self, _v: f32) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_f64(self, _v: f64) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_char(self, _v: char) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_str(self, _v: &str) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_bytes(self, _v: &[u8]) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_some<T>(self, _value: &T) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
fn serialize_newtype_struct<T>(
self,
_name: &'static str,
_value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn serialize_newtype_variant<T>(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_value: &T,
) -> Result<Self::Ok, Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
unreachable!()
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
unreachable!()
}
fn serialize_tuple_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
unreachable!()
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
unreachable!()
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
unreachable!()
}
fn serialize_struct(
self,
_name: &'static str,
_len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
unreachable!()
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
_variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
unreachable!()
}
}
impl ser::SerializeSeq for &mut Decimal {
type Ok = ();
type Error = Error;
fn serialize_element<T>(&mut self, _value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn end(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
}
impl ser::SerializeTuple for &mut Decimal {
type Ok = ();
type Error = Error;
fn serialize_element<T>(&mut self, _value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn end(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
}
impl ser::SerializeTupleStruct for &mut Decimal {
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, _value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn end(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
}
impl ser::SerializeTupleVariant for &mut Decimal {
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, _value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn end(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
}
impl ser::SerializeMap for &mut Decimal {
type Ok = ();
type Error = Error;
fn serialize_key<T>(&mut self, _key: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn serialize_value<T>(&mut self, _value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn end(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
}
impl ser::SerializeStruct for &mut Decimal {
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, _key: &'static str, _value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn end(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
}
impl ser::SerializeStructVariant for &mut Decimal {
type Ok = ();
type Error = Error;
fn serialize_field<T>(&mut self, _key: &'static str, _value: &T) -> Result<(), Self::Error>
where
T: ?Sized + Serialize,
{
unreachable!()
}
fn end(self) -> Result<Self::Ok, Self::Error> {
unreachable!()
}
}