use crate::error::UnevalError;
use serde::ser;
use std::io::Write;
pub(crate) type SerResult = Result<(), UnevalError>;
pub struct Uneval<W: Write> {
writer: W,
inside: bool,
}
impl<W: Write> Uneval<W> {
pub(crate) fn new(target: W) -> Self {
Self {
writer: target,
inside: false,
}
}
fn start_sub(&mut self) -> &mut Self {
self.inside = false;
self
}
fn comma(&mut self) -> SerResult {
if self.inside {
write!(self.writer, ",")?;
}
self.inside = true;
Ok(())
}
fn serialize_item(&mut self, item: impl ser::Serialize) -> SerResult {
self.comma()?;
item.serialize(self)?;
Ok(())
}
}
impl<W: Write> ser::Serializer for &mut Uneval<W> {
type Ok = ();
type Error = UnevalError;
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) -> SerResult {
write!(self.writer, "{}", v)?;
Ok(())
}
fn serialize_i8(self, v: i8) -> SerResult {
write!(self.writer, "{}i8", v)?;
Ok(())
}
fn serialize_i16(self, v: i16) -> SerResult {
write!(self.writer, "{}i16", v)?;
Ok(())
}
fn serialize_i32(self, v: i32) -> SerResult {
write!(self.writer, "{}i32", v)?;
Ok(())
}
fn serialize_i64(self, v: i64) -> SerResult {
write!(self.writer, "{}i64", v)?;
Ok(())
}
fn serialize_i128(self, v: i128) -> SerResult {
write!(self.writer, "{}i128", v)?;
Ok(())
}
fn serialize_u8(self, v: u8) -> SerResult {
write!(self.writer, "{}u8", v)?;
Ok(())
}
fn serialize_u16(self, v: u16) -> SerResult {
write!(self.writer, "{}u16", v)?;
Ok(())
}
fn serialize_u32(self, v: u32) -> SerResult {
write!(self.writer, "{}u32", v)?;
Ok(())
}
fn serialize_u64(self, v: u64) -> SerResult {
write!(self.writer, "{}u64", v)?;
Ok(())
}
fn serialize_u128(self, v: u128) -> SerResult {
write!(self.writer, "{}u128", v)?;
Ok(())
}
fn serialize_f32(self, v: f32) -> SerResult {
write!(self.writer, "{}f32", v)?;
Ok(())
}
fn serialize_f64(self, v: f64) -> SerResult {
write!(self.writer, "{}f64", v)?;
Ok(())
}
fn serialize_char(self, v: char) -> SerResult {
write!(self.writer, "'{}'", v)?;
Ok(())
}
fn serialize_str(self, v: &str) -> SerResult {
write!(self.writer, "\"{}\".into()", v)?;
Ok(())
}
fn serialize_bytes(self, v: &[u8]) -> SerResult {
self.collect_seq(v)?;
Ok(())
}
fn serialize_none(self) -> SerResult {
write!(self.writer, "None")?;
Ok(())
}
fn serialize_some<T: ?Sized>(self, value: &T) -> SerResult
where
T: serde::Serialize,
{
write!(self.writer, "Some(")?;
value.serialize(&mut *self)?;
write!(self.writer, ")")?;
Ok(())
}
fn serialize_unit(self) -> SerResult {
write!(self.writer, "()")?;
Ok(())
}
fn serialize_unit_struct(self, name: &'static str) -> SerResult {
write!(self.writer, "{}", name)?;
Ok(())
}
fn serialize_unit_variant(
self,
name: &'static str,
_variant_index: u32,
variant: &'static str,
) -> SerResult {
write!(self.writer, "{}::{}", name, variant)?;
Ok(())
}
fn serialize_newtype_struct<T: ?Sized>(self, name: &'static str, value: &T) -> SerResult
where
T: serde::Serialize,
{
write!(self.writer, "{}(", name)?;
value.serialize(&mut *self)?;
write!(self.writer, ")")?;
Ok(())
}
fn serialize_newtype_variant<T: ?Sized>(
self,
name: &'static str,
_variant_index: u32,
variant: &'static str,
value: &T,
) -> SerResult
where
T: serde::Serialize,
{
write!(self.writer, "{}::{}(", name, variant)?;
value.serialize(&mut *self)?;
write!(self.writer, ")")?;
Ok(())
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
write!(self.writer, "vec![")?;
Ok(self.start_sub())
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
write!(self.writer, "{{")?;
crate::helpers::tuple_converter(&mut self.writer, len)?;
write!(self.writer, "convert((")?;
Ok(self.start_sub())
}
fn serialize_tuple_struct(
self,
name: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
write!(self.writer, "{}(", name)?;
Ok(self.start_sub())
}
fn serialize_tuple_variant(
self,
name: &'static str,
_variant_index: u32,
variant: &'static str,
_len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
write!(self.writer, "{}::{}(", name, variant)?;
Ok(self.start_sub())
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
write!(self.writer, "vec![")?;
Ok(self.start_sub())
}
fn serialize_struct(
self,
name: &'static str,
_len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
write!(self.writer, "{} {{", name)?;
Ok(self.start_sub())
}
fn serialize_struct_variant(
self,
name: &'static str,
_variant_index: u32,
variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
write!(self.writer, "{}::{} {{", name, variant)?;
Ok(self.start_sub())
}
}
impl<W: Write> ser::SerializeSeq for &mut Uneval<W> {
type Ok = ();
type Error = UnevalError;
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize,
{
self.serialize_item(value)
}
fn end(self) -> SerResult {
write!(self.writer, "].into_iter().collect()")?;
Ok(())
}
}
impl<W: Write> ser::SerializeTuple for &mut Uneval<W> {
type Ok = ();
type Error = UnevalError;
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize,
{
self.serialize_item(value)
}
fn end(self) -> SerResult {
write!(self.writer, ")) }}")?;
Ok(())
}
}
impl<W: Write> ser::SerializeTupleStruct for &mut Uneval<W> {
type Ok = ();
type Error = UnevalError;
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize,
{
self.serialize_item(value)
}
fn end(self) -> SerResult {
write!(self.writer, ")")?;
Ok(())
}
}
impl<W: Write> ser::SerializeTupleVariant for &mut Uneval<W> {
type Ok = ();
type Error = UnevalError;
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize,
{
self.serialize_item(value)
}
fn end(self) -> SerResult {
write!(self.writer, ")")?;
Ok(())
}
}
impl<W: Write> ser::SerializeMap for &mut Uneval<W> {
type Ok = ();
type Error = UnevalError;
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
where
T: serde::Serialize,
{
self.comma()?;
write!(self.writer, "(")?;
key.serialize(&mut **self)?;
write!(self.writer, ",")?;
Ok(())
}
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
where
T: serde::Serialize,
{
value.serialize(&mut **self)?;
write!(self.writer, ")")?;
Ok(())
}
fn end(self) -> SerResult {
write!(self.writer, "].into_iter().collect()")?;
Ok(())
}
}
impl<W: Write> ser::SerializeStruct for &mut Uneval<W> {
type Ok = ();
type Error = UnevalError;
fn serialize_field<T: ?Sized>(
&mut self,
key: &'static str,
value: &T,
) -> Result<(), Self::Error>
where
T: serde::Serialize,
{
self.comma()?;
write!(self.writer, "{}: ", key)?;
value.serialize(&mut **self)?;
Ok(())
}
fn end(self) -> SerResult {
write!(self.writer, "}}")?;
Ok(())
}
}
impl<W: Write> ser::SerializeStructVariant for &mut Uneval<W> {
type Ok = ();
type Error = UnevalError;
fn serialize_field<T: ?Sized>(
&mut self,
key: &'static str,
value: &T,
) -> Result<(), Self::Error>
where
T: serde::Serialize,
{
self.comma()?;
write!(self.writer, "{}: ", key)?;
value.serialize(&mut **self)?;
Ok(())
}
fn end(self) -> SerResult {
write!(self.writer, "}}")?;
Ok(())
}
}