use crate::any::Any;
use crate::error::{erase_de as erase, unerase_de as unerase, Error};
use crate::map::{OptionExt, ResultExt};
use crate::sealed::deserializer::Sealed;
use alloc::boxed::Box;
#[cfg(feature = "alloc")]
use alloc::string::String;
#[cfg(feature = "alloc")]
use alloc::vec::Vec;
use core::fmt;
pub fn deserialize<'de, T>(deserializer: &mut dyn Deserializer<'de>) -> Result<T, Error>
where
T: serde::Deserialize<'de>,
{
serde::Deserialize::deserialize(deserializer)
}
pub trait DeserializeSeed<'de> {
fn erased_deserialize_seed(
&mut self,
deserializer: &mut dyn Deserializer<'de>,
) -> Result<Out, Error>;
}
pub trait Deserializer<'de>: Sealed {
fn erased_deserialize_any(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_bool(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_i8(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_i16(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_i32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_i64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_i128(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_u8(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_u16(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_u32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_u64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_u128(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_f32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_f64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_char(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_str(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_string(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_bytes(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_byte_buf(&mut self, visitor: &mut dyn Visitor<'de>)
-> Result<Out, Error>;
fn erased_deserialize_option(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_unit(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_unit_struct(
&mut self,
name: &'static str,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>;
fn erased_deserialize_newtype_struct(
&mut self,
name: &'static str,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>;
fn erased_deserialize_seq(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_tuple(
&mut self,
len: usize,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>;
fn erased_deserialize_tuple_struct(
&mut self,
name: &'static str,
len: usize,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>;
fn erased_deserialize_map(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>;
fn erased_deserialize_struct(
&mut self,
name: &'static str,
fields: &'static [&'static str],
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>;
fn erased_deserialize_identifier(
&mut self,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>;
fn erased_deserialize_enum(
&mut self,
name: &'static str,
variants: &'static [&'static str],
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>;
fn erased_deserialize_ignored_any(
&mut self,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>;
fn erased_is_human_readable(&self) -> bool;
}
pub trait Visitor<'de> {
fn erased_expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result;
fn erased_visit_bool(&mut self, v: bool) -> Result<Out, Error>;
fn erased_visit_i8(&mut self, v: i8) -> Result<Out, Error>;
fn erased_visit_i16(&mut self, v: i16) -> Result<Out, Error>;
fn erased_visit_i32(&mut self, v: i32) -> Result<Out, Error>;
fn erased_visit_i64(&mut self, v: i64) -> Result<Out, Error>;
fn erased_visit_i128(&mut self, v: i128) -> Result<Out, Error>;
fn erased_visit_u8(&mut self, v: u8) -> Result<Out, Error>;
fn erased_visit_u16(&mut self, v: u16) -> Result<Out, Error>;
fn erased_visit_u32(&mut self, v: u32) -> Result<Out, Error>;
fn erased_visit_u64(&mut self, v: u64) -> Result<Out, Error>;
fn erased_visit_u128(&mut self, v: u128) -> Result<Out, Error>;
fn erased_visit_f32(&mut self, v: f32) -> Result<Out, Error>;
fn erased_visit_f64(&mut self, v: f64) -> Result<Out, Error>;
fn erased_visit_char(&mut self, v: char) -> Result<Out, Error>;
fn erased_visit_str(&mut self, v: &str) -> Result<Out, Error>;
fn erased_visit_borrowed_str(&mut self, v: &'de str) -> Result<Out, Error>;
#[cfg(feature = "alloc")]
fn erased_visit_string(&mut self, v: String) -> Result<Out, Error>;
fn erased_visit_bytes(&mut self, v: &[u8]) -> Result<Out, Error>;
fn erased_visit_borrowed_bytes(&mut self, v: &'de [u8]) -> Result<Out, Error>;
#[cfg(feature = "alloc")]
fn erased_visit_byte_buf(&mut self, v: Vec<u8>) -> Result<Out, Error>;
fn erased_visit_none(&mut self) -> Result<Out, Error>;
fn erased_visit_some(&mut self, deserializer: &mut dyn Deserializer<'de>)
-> Result<Out, Error>;
fn erased_visit_unit(&mut self) -> Result<Out, Error>;
fn erased_visit_newtype_struct(
&mut self,
deserializer: &mut dyn Deserializer<'de>,
) -> Result<Out, Error>;
fn erased_visit_seq(&mut self, seq: &mut dyn SeqAccess<'de>) -> Result<Out, Error>;
fn erased_visit_map(&mut self, map: &mut dyn MapAccess<'de>) -> Result<Out, Error>;
fn erased_visit_enum(&mut self, data: &mut dyn EnumAccess<'de>) -> Result<Out, Error>;
}
pub trait SeqAccess<'de> {
fn erased_next_element(
&mut self,
seed: &mut dyn DeserializeSeed<'de>,
) -> Result<Option<Out>, Error>;
fn erased_size_hint(&self) -> Option<usize>;
}
pub trait MapAccess<'de> {
fn erased_next_key(
&mut self,
seed: &mut dyn DeserializeSeed<'de>,
) -> Result<Option<Out>, Error>;
fn erased_next_value(&mut self, seed: &mut dyn DeserializeSeed<'de>) -> Result<Out, Error>;
fn erased_next_entry(
&mut self,
key: &mut dyn DeserializeSeed<'de>,
value: &mut dyn DeserializeSeed<'de>,
) -> Result<Option<(Out, Out)>, Error>;
fn erased_size_hint(&self) -> Option<usize>;
}
pub trait EnumAccess<'de> {
fn erased_variant_seed(
&mut self,
seed: &mut dyn DeserializeSeed<'de>,
) -> Result<(Out, Variant<'de>), Error>;
}
impl<'de> dyn Deserializer<'de> {
pub fn erase<D>(deserializer: D) -> impl Deserializer<'de>
where
D: serde::Deserializer<'de>,
{
erase::Deserializer::new(deserializer)
}
}
pub struct Out(Any);
impl Out {
unsafe fn new<T>(t: T) -> Self {
Out(unsafe { Any::new(t) })
}
unsafe fn take<T>(self) -> T {
unsafe { self.0.take() }
}
}
mod erase {
pub struct DeserializeSeed<D> {
state: Option<D>,
}
impl<D> DeserializeSeed<D> {
pub(crate) fn new(seed: D) -> Self {
DeserializeSeed { state: Some(seed) }
}
pub(crate) fn take(&mut self) -> D {
self.state.take().unwrap()
}
}
pub struct Deserializer<D> {
state: Option<D>,
}
impl<D> Deserializer<D> {
pub(crate) fn new(deserializer: D) -> Self {
Deserializer {
state: Some(deserializer),
}
}
pub(crate) fn take(&mut self) -> D {
self.state.take().unwrap()
}
pub(crate) fn as_ref(&self) -> &D {
self.state.as_ref().unwrap()
}
}
pub struct Visitor<D> {
state: Option<D>,
}
impl<D> Visitor<D> {
pub(crate) fn new(visitor: D) -> Self {
Visitor {
state: Some(visitor),
}
}
pub(crate) fn take(&mut self) -> D {
self.state.take().unwrap()
}
pub(crate) fn as_ref(&self) -> &D {
self.state.as_ref().unwrap()
}
}
pub struct SeqAccess<D> {
state: D,
}
impl<D> SeqAccess<D> {
pub(crate) fn new(seq_access: D) -> Self {
SeqAccess { state: seq_access }
}
pub(crate) fn as_ref(&self) -> &D {
&self.state
}
pub(crate) fn as_mut(&mut self) -> &mut D {
&mut self.state
}
}
pub struct MapAccess<D> {
state: D,
}
impl<D> MapAccess<D> {
pub(crate) fn new(map_access: D) -> Self {
MapAccess { state: map_access }
}
pub(crate) fn as_ref(&self) -> &D {
&self.state
}
pub(crate) fn as_mut(&mut self) -> &mut D {
&mut self.state
}
}
pub struct EnumAccess<D> {
state: Option<D>,
}
impl<D> EnumAccess<D> {
pub(crate) fn new(enum_access: D) -> Self {
EnumAccess {
state: Some(enum_access),
}
}
pub(crate) fn take(&mut self) -> D {
self.state.take().unwrap()
}
}
}
impl<'de, T> DeserializeSeed<'de> for erase::DeserializeSeed<T>
where
T: serde::de::DeserializeSeed<'de>,
{
fn erased_deserialize_seed(
&mut self,
deserializer: &mut dyn Deserializer<'de>,
) -> Result<Out, Error> {
unsafe { self.take().deserialize(deserializer).unsafe_map(Out::new) }
}
}
impl<'de, T> Deserializer<'de> for erase::Deserializer<T>
where
T: serde::Deserializer<'de>,
{
fn erased_deserialize_any(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_any(visitor).map_err(erase)
}
fn erased_deserialize_bool(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_bool(visitor).map_err(erase)
}
fn erased_deserialize_i8(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_i8(visitor).map_err(erase)
}
fn erased_deserialize_i16(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_i16(visitor).map_err(erase)
}
fn erased_deserialize_i32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_i32(visitor).map_err(erase)
}
fn erased_deserialize_i64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_i64(visitor).map_err(erase)
}
fn erased_deserialize_i128(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_i128(visitor).map_err(erase)
}
fn erased_deserialize_u8(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_u8(visitor).map_err(erase)
}
fn erased_deserialize_u16(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_u16(visitor).map_err(erase)
}
fn erased_deserialize_u32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_u32(visitor).map_err(erase)
}
fn erased_deserialize_u64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_u64(visitor).map_err(erase)
}
fn erased_deserialize_u128(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_u128(visitor).map_err(erase)
}
fn erased_deserialize_f32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_f32(visitor).map_err(erase)
}
fn erased_deserialize_f64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_f64(visitor).map_err(erase)
}
fn erased_deserialize_char(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_char(visitor).map_err(erase)
}
fn erased_deserialize_str(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_str(visitor).map_err(erase)
}
fn erased_deserialize_string(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_string(visitor).map_err(erase)
}
fn erased_deserialize_bytes(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_bytes(visitor).map_err(erase)
}
fn erased_deserialize_byte_buf(
&mut self,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take().deserialize_byte_buf(visitor).map_err(erase)
}
fn erased_deserialize_option(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_option(visitor).map_err(erase)
}
fn erased_deserialize_unit(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_unit(visitor).map_err(erase)
}
fn erased_deserialize_unit_struct(
&mut self,
name: &'static str,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take()
.deserialize_unit_struct(name, visitor)
.map_err(erase)
}
fn erased_deserialize_newtype_struct(
&mut self,
name: &'static str,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take()
.deserialize_newtype_struct(name, visitor)
.map_err(erase)
}
fn erased_deserialize_seq(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_seq(visitor).map_err(erase)
}
fn erased_deserialize_tuple(
&mut self,
len: usize,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take().deserialize_tuple(len, visitor).map_err(erase)
}
fn erased_deserialize_tuple_struct(
&mut self,
name: &'static str,
len: usize,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take()
.deserialize_tuple_struct(name, len, visitor)
.map_err(erase)
}
fn erased_deserialize_map(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
self.take().deserialize_map(visitor).map_err(erase)
}
fn erased_deserialize_struct(
&mut self,
name: &'static str,
fields: &'static [&'static str],
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take()
.deserialize_struct(name, fields, visitor)
.map_err(erase)
}
fn erased_deserialize_identifier(
&mut self,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take().deserialize_identifier(visitor).map_err(erase)
}
fn erased_deserialize_enum(
&mut self,
name: &'static str,
variants: &'static [&'static str],
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take()
.deserialize_enum(name, variants, visitor)
.map_err(erase)
}
fn erased_deserialize_ignored_any(
&mut self,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error> {
self.take().deserialize_ignored_any(visitor).map_err(erase)
}
fn erased_is_human_readable(&self) -> bool {
self.as_ref().is_human_readable()
}
}
impl<'de, T> Sealed for erase::Deserializer<T> where T: serde::Deserializer<'de> {}
impl<'de, T> Visitor<'de> for erase::Visitor<T>
where
T: serde::de::Visitor<'de>,
{
fn erased_expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
self.as_ref().expecting(formatter)
}
fn erased_visit_bool(&mut self, v: bool) -> Result<Out, Error> {
unsafe { self.take().visit_bool(v).unsafe_map(Out::new) }
}
fn erased_visit_i8(&mut self, v: i8) -> Result<Out, Error> {
unsafe { self.take().visit_i8(v).unsafe_map(Out::new) }
}
fn erased_visit_i16(&mut self, v: i16) -> Result<Out, Error> {
unsafe { self.take().visit_i16(v).unsafe_map(Out::new) }
}
fn erased_visit_i32(&mut self, v: i32) -> Result<Out, Error> {
unsafe { self.take().visit_i32(v).unsafe_map(Out::new) }
}
fn erased_visit_i64(&mut self, v: i64) -> Result<Out, Error> {
unsafe { self.take().visit_i64(v).unsafe_map(Out::new) }
}
fn erased_visit_i128(&mut self, v: i128) -> Result<Out, Error> {
unsafe { self.take().visit_i128(v).unsafe_map(Out::new) }
}
fn erased_visit_u8(&mut self, v: u8) -> Result<Out, Error> {
unsafe { self.take().visit_u8(v).unsafe_map(Out::new) }
}
fn erased_visit_u16(&mut self, v: u16) -> Result<Out, Error> {
unsafe { self.take().visit_u16(v).unsafe_map(Out::new) }
}
fn erased_visit_u32(&mut self, v: u32) -> Result<Out, Error> {
unsafe { self.take().visit_u32(v).unsafe_map(Out::new) }
}
fn erased_visit_u64(&mut self, v: u64) -> Result<Out, Error> {
unsafe { self.take().visit_u64(v).unsafe_map(Out::new) }
}
fn erased_visit_u128(&mut self, v: u128) -> Result<Out, Error> {
unsafe { self.take().visit_u128(v).unsafe_map(Out::new) }
}
fn erased_visit_f32(&mut self, v: f32) -> Result<Out, Error> {
unsafe { self.take().visit_f32(v).unsafe_map(Out::new) }
}
fn erased_visit_f64(&mut self, v: f64) -> Result<Out, Error> {
unsafe { self.take().visit_f64(v).unsafe_map(Out::new) }
}
fn erased_visit_char(&mut self, v: char) -> Result<Out, Error> {
unsafe { self.take().visit_char(v).unsafe_map(Out::new) }
}
fn erased_visit_str(&mut self, v: &str) -> Result<Out, Error> {
unsafe { self.take().visit_str(v).unsafe_map(Out::new) }
}
fn erased_visit_borrowed_str(&mut self, v: &'de str) -> Result<Out, Error> {
unsafe { self.take().visit_borrowed_str(v).unsafe_map(Out::new) }
}
#[cfg(feature = "alloc")]
fn erased_visit_string(&mut self, v: String) -> Result<Out, Error> {
unsafe { self.take().visit_string(v).unsafe_map(Out::new) }
}
fn erased_visit_bytes(&mut self, v: &[u8]) -> Result<Out, Error> {
unsafe { self.take().visit_bytes(v).unsafe_map(Out::new) }
}
fn erased_visit_borrowed_bytes(&mut self, v: &'de [u8]) -> Result<Out, Error> {
unsafe { self.take().visit_borrowed_bytes(v).unsafe_map(Out::new) }
}
#[cfg(feature = "alloc")]
fn erased_visit_byte_buf(&mut self, v: Vec<u8>) -> Result<Out, Error> {
unsafe { self.take().visit_byte_buf(v).unsafe_map(Out::new) }
}
fn erased_visit_none(&mut self) -> Result<Out, Error> {
unsafe { self.take().visit_none().unsafe_map(Out::new) }
}
fn erased_visit_some(
&mut self,
deserializer: &mut dyn Deserializer<'de>,
) -> Result<Out, Error> {
unsafe { self.take().visit_some(deserializer).unsafe_map(Out::new) }
}
fn erased_visit_unit(&mut self) -> Result<Out, Error> {
unsafe { self.take().visit_unit().unsafe_map(Out::new) }
}
fn erased_visit_newtype_struct(
&mut self,
deserializer: &mut dyn Deserializer<'de>,
) -> Result<Out, Error> {
unsafe {
self.take()
.visit_newtype_struct(deserializer)
.unsafe_map(Out::new)
}
}
fn erased_visit_seq(&mut self, seq: &mut dyn SeqAccess<'de>) -> Result<Out, Error> {
unsafe { self.take().visit_seq(seq).unsafe_map(Out::new) }
}
fn erased_visit_map(&mut self, map: &mut dyn MapAccess<'de>) -> Result<Out, Error> {
unsafe { self.take().visit_map(map).unsafe_map(Out::new) }
}
fn erased_visit_enum(&mut self, data: &mut dyn EnumAccess<'de>) -> Result<Out, Error> {
unsafe { self.take().visit_enum(data).unsafe_map(Out::new) }
}
}
impl<'de, T> SeqAccess<'de> for erase::SeqAccess<T>
where
T: serde::de::SeqAccess<'de>,
{
fn erased_next_element(
&mut self,
seed: &mut dyn DeserializeSeed<'de>,
) -> Result<Option<Out>, Error> {
self.as_mut().next_element_seed(seed).map_err(erase)
}
fn erased_size_hint(&self) -> Option<usize> {
self.as_ref().size_hint()
}
}
impl<'de, T> MapAccess<'de> for erase::MapAccess<T>
where
T: serde::de::MapAccess<'de>,
{
fn erased_next_key(
&mut self,
seed: &mut dyn DeserializeSeed<'de>,
) -> Result<Option<Out>, Error> {
self.as_mut().next_key_seed(seed).map_err(erase)
}
fn erased_next_value(&mut self, seed: &mut dyn DeserializeSeed<'de>) -> Result<Out, Error> {
self.as_mut().next_value_seed(seed).map_err(erase)
}
fn erased_next_entry(
&mut self,
kseed: &mut dyn DeserializeSeed<'de>,
vseed: &mut dyn DeserializeSeed<'de>,
) -> Result<Option<(Out, Out)>, Error> {
self.as_mut().next_entry_seed(kseed, vseed).map_err(erase)
}
fn erased_size_hint(&self) -> Option<usize> {
self.as_ref().size_hint()
}
}
impl<'de, T> EnumAccess<'de> for erase::EnumAccess<T>
where
T: serde::de::EnumAccess<'de>,
{
fn erased_variant_seed(
&mut self,
seed: &mut dyn DeserializeSeed<'de>,
) -> Result<(Out, Variant<'de>), Error> {
self.take()
.variant_seed(seed)
.map(|(out, variant)| {
use serde::de::VariantAccess;
let erased = Variant {
data: unsafe { Any::new(variant) },
unit_variant: {
unsafe fn unit_variant<'de, T>(a: Any) -> Result<(), Error>
where
T: serde::de::EnumAccess<'de>,
{
unsafe { a.take::<T::Variant>().unit_variant().map_err(erase) }
}
unit_variant::<T>
},
visit_newtype: {
unsafe fn visit_newtype<'de, T>(
a: Any,
seed: &mut dyn DeserializeSeed<'de>,
) -> Result<Out, Error>
where
T: serde::de::EnumAccess<'de>,
{
unsafe {
a.take::<T::Variant>()
.newtype_variant_seed(seed)
.map_err(erase)
}
}
visit_newtype::<T>
},
tuple_variant: {
unsafe fn tuple_variant<'de, T>(
a: Any,
len: usize,
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>
where
T: serde::de::EnumAccess<'de>,
{
unsafe {
a.take::<T::Variant>()
.tuple_variant(len, visitor)
.map_err(erase)
}
}
tuple_variant::<T>
},
struct_variant: {
unsafe fn struct_variant<'de, T>(
a: Any,
fields: &'static [&'static str],
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>
where
T: serde::de::EnumAccess<'de>,
{
unsafe {
a.take::<T::Variant>()
.struct_variant(fields, visitor)
.map_err(erase)
}
}
struct_variant::<T>
},
};
(out, erased)
})
.map_err(erase)
}
}
impl<'de> serde::de::DeserializeSeed<'de> for &mut (dyn DeserializeSeed<'de> + '_) {
type Value = Out;
fn deserialize<D>(self, deserializer: D) -> Result<Out, D::Error>
where
D: serde::Deserializer<'de>,
{
let mut erased = erase::Deserializer::new(deserializer);
self.erased_deserialize_seed(&mut erased).map_err(unerase)
}
}
macro_rules! impl_deserializer_for_trait_object {
({$($mut:tt)*} $ty:ty) => {
impl<'de> serde::Deserializer<'de> for $ty {
type Error = Error;
fn deserialize_any<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_any(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_bool<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_bool(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_i8<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_i8(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_i16<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_i16(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_i32<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_i32(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_i64<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_i64(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_i128<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_i128(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_u8<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_u8(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_u16<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_u16(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_u32<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_u32(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_u64<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_u64(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_u128<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_u128(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_f32<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_f32(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_f64<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_f64(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_char<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_char(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_str<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_str(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_string<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_string(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_bytes<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_bytes(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_byte_buf<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_byte_buf(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_option<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_option(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_unit<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_unit(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_unit_struct<V>($($mut)* self, name: &'static str, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_unit_struct(name, &mut erased).unsafe_map(Out::take) }
}
fn deserialize_newtype_struct<V>($($mut)* self, name: &'static str, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_newtype_struct(name, &mut erased).unsafe_map(Out::take) }
}
fn deserialize_seq<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_seq(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_tuple<V>($($mut)* self, len: usize, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_tuple(len, &mut erased).unsafe_map(Out::take) }
}
fn deserialize_tuple_struct<V>($($mut)* self, name: &'static str, len: usize, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_tuple_struct(name, len, &mut erased).unsafe_map(Out::take) }
}
fn deserialize_map<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_map(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_struct<V>($($mut)* self, name: &'static str, fields: &'static [&'static str], visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_struct(name, fields, &mut erased).unsafe_map(Out::take) }
}
fn deserialize_identifier<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_identifier(&mut erased).unsafe_map(Out::take) }
}
fn deserialize_enum<V>($($mut)* self, name: &'static str, variants: &'static [&'static str], visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_enum(name, variants, &mut erased).unsafe_map(Out::take) }
}
fn deserialize_ignored_any<V>($($mut)* self, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { self.erased_deserialize_ignored_any(&mut erased).unsafe_map(Out::take) }
}
fn is_human_readable(&self) -> bool {
self.erased_is_human_readable()
}
}
};
}
impl_deserializer_for_trait_object!({} &mut (dyn Deserializer<'de> + '_));
impl_deserializer_for_trait_object!({} &mut (dyn Deserializer<'de> + Send + '_));
impl_deserializer_for_trait_object!({} &mut (dyn Deserializer<'de> + Sync + '_));
impl_deserializer_for_trait_object!({} &mut (dyn Deserializer<'de> + Send + Sync + '_));
impl_deserializer_for_trait_object!({mut} Box<dyn Deserializer<'de> + '_>);
impl_deserializer_for_trait_object!({mut} Box<dyn Deserializer<'de> + Send + '_>);
impl_deserializer_for_trait_object!({mut} Box<dyn Deserializer<'de> + Sync + '_>);
impl_deserializer_for_trait_object!({mut} Box<dyn Deserializer<'de> + Send + Sync + '_>);
impl<'de> serde::de::Visitor<'de> for &mut (dyn Visitor<'de> + '_) {
type Value = Out;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
(**self).erased_expecting(formatter)
}
fn visit_bool<E>(self, v: bool) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_bool(v).map_err(unerase)
}
fn visit_i8<E>(self, v: i8) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_i8(v).map_err(unerase)
}
fn visit_i16<E>(self, v: i16) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_i16(v).map_err(unerase)
}
fn visit_i32<E>(self, v: i32) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_i32(v).map_err(unerase)
}
fn visit_i64<E>(self, v: i64) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_i64(v).map_err(unerase)
}
fn visit_i128<E>(self, v: i128) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_i128(v).map_err(unerase)
}
fn visit_u8<E>(self, v: u8) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_u8(v).map_err(unerase)
}
fn visit_u16<E>(self, v: u16) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_u16(v).map_err(unerase)
}
fn visit_u32<E>(self, v: u32) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_u32(v).map_err(unerase)
}
fn visit_u64<E>(self, v: u64) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_u64(v).map_err(unerase)
}
fn visit_u128<E>(self, v: u128) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_u128(v).map_err(unerase)
}
fn visit_f32<E>(self, v: f32) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_f32(v).map_err(unerase)
}
fn visit_f64<E>(self, v: f64) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_f64(v).map_err(unerase)
}
fn visit_char<E>(self, v: char) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_char(v).map_err(unerase)
}
fn visit_str<E>(self, v: &str) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_str(v).map_err(unerase)
}
fn visit_borrowed_str<E>(self, v: &'de str) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_borrowed_str(v).map_err(unerase)
}
#[cfg(feature = "alloc")]
fn visit_string<E>(self, v: String) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_string(v).map_err(unerase)
}
fn visit_bytes<E>(self, v: &[u8]) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_bytes(v).map_err(unerase)
}
fn visit_borrowed_bytes<E>(self, v: &'de [u8]) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_borrowed_bytes(v).map_err(unerase)
}
#[cfg(feature = "alloc")]
fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_byte_buf(v).map_err(unerase)
}
fn visit_none<E>(self) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_none().map_err(unerase)
}
fn visit_some<D>(self, deserializer: D) -> Result<Out, D::Error>
where
D: serde::Deserializer<'de>,
{
let mut erased = erase::Deserializer::new(deserializer);
self.erased_visit_some(&mut erased).map_err(unerase)
}
fn visit_unit<E>(self) -> Result<Out, E>
where
E: serde::de::Error,
{
self.erased_visit_unit().map_err(unerase)
}
fn visit_newtype_struct<D>(self, deserializer: D) -> Result<Out, D::Error>
where
D: serde::Deserializer<'de>,
{
let mut erased = erase::Deserializer::new(deserializer);
self.erased_visit_newtype_struct(&mut erased)
.map_err(unerase)
}
fn visit_seq<V>(self, seq: V) -> Result<Out, V::Error>
where
V: serde::de::SeqAccess<'de>,
{
let mut erased = erase::SeqAccess::new(seq);
self.erased_visit_seq(&mut erased).map_err(unerase)
}
fn visit_map<V>(self, map: V) -> Result<Out, V::Error>
where
V: serde::de::MapAccess<'de>,
{
let mut erased = erase::MapAccess::new(map);
self.erased_visit_map(&mut erased).map_err(unerase)
}
fn visit_enum<V>(self, data: V) -> Result<Out, V::Error>
where
V: serde::de::EnumAccess<'de>,
{
let mut erased = erase::EnumAccess::new(data);
self.erased_visit_enum(&mut erased).map_err(unerase)
}
}
impl<'de> serde::de::SeqAccess<'de> for &mut (dyn SeqAccess<'de> + '_) {
type Error = Error;
fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Error>
where
T: serde::de::DeserializeSeed<'de>,
{
let mut seed = erase::DeserializeSeed::new(seed);
unsafe {
(**self)
.erased_next_element(&mut seed)
.map(|opt| opt.unsafe_map(Out::take))
}
}
fn size_hint(&self) -> Option<usize> {
(**self).erased_size_hint()
}
}
impl<'de> serde::de::MapAccess<'de> for &mut (dyn MapAccess<'de> + '_) {
type Error = Error;
fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
where
K: serde::de::DeserializeSeed<'de>,
{
let mut erased = erase::DeserializeSeed::new(seed);
unsafe {
(**self)
.erased_next_key(&mut erased)
.map(|opt| opt.unsafe_map(Out::take))
}
}
fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
where
V: serde::de::DeserializeSeed<'de>,
{
let mut erased = erase::DeserializeSeed::new(seed);
unsafe {
(**self)
.erased_next_value(&mut erased)
.unsafe_map(Out::take)
}
}
fn size_hint(&self) -> Option<usize> {
(**self).erased_size_hint()
}
}
impl<'de> serde::de::EnumAccess<'de> for &mut (dyn EnumAccess<'de> + '_) {
type Error = Error;
type Variant = Variant<'de>;
fn variant_seed<V>(self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error>
where
V: serde::de::DeserializeSeed<'de>,
{
let mut erased = erase::DeserializeSeed::new(seed);
match self.erased_variant_seed(&mut erased) {
Ok((out, variant)) => Ok((unsafe { out.take() }, variant)),
Err(err) => Err(err),
}
}
}
pub struct Variant<'de> {
data: Any,
unit_variant: unsafe fn(Any) -> Result<(), Error>,
visit_newtype: unsafe fn(Any, seed: &mut dyn DeserializeSeed<'de>) -> Result<Out, Error>,
tuple_variant: unsafe fn(Any, len: usize, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error>,
struct_variant: unsafe fn(
Any,
fields: &'static [&'static str],
visitor: &mut dyn Visitor<'de>,
) -> Result<Out, Error>,
}
impl<'de> serde::de::VariantAccess<'de> for Variant<'de> {
type Error = Error;
fn unit_variant(self) -> Result<(), Error> {
unsafe { (self.unit_variant)(self.data) }
}
fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Error>
where
T: serde::de::DeserializeSeed<'de>,
{
let mut erased = erase::DeserializeSeed::new(seed);
unsafe { (self.visit_newtype)(self.data, &mut erased).unsafe_map(Out::take) }
}
fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { (self.tuple_variant)(self.data, len, &mut erased).unsafe_map(Out::take) }
}
fn struct_variant<V>(
self,
fields: &'static [&'static str],
visitor: V,
) -> Result<V::Value, Error>
where
V: serde::de::Visitor<'de>,
{
let mut erased = erase::Visitor::new(visitor);
unsafe { (self.struct_variant)(self.data, fields, &mut erased).unsafe_map(Out::take) }
}
}
macro_rules! deref_erased_deserializer {
(<'de $(, $T:ident)*> Deserializer<'de> for $ty:ty $(where $($where:tt)*)?) => {
impl<'de $(, $T)*> Deserializer<'de> for $ty $(where $($where)*)? {
fn erased_deserialize_any(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_any(visitor)
}
fn erased_deserialize_bool(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_bool(visitor)
}
fn erased_deserialize_i8(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_i8(visitor)
}
fn erased_deserialize_i16(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_i16(visitor)
}
fn erased_deserialize_i32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_i32(visitor)
}
fn erased_deserialize_i64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_i64(visitor)
}
fn erased_deserialize_i128(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_i128(visitor)
}
fn erased_deserialize_u8(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_u8(visitor)
}
fn erased_deserialize_u16(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_u16(visitor)
}
fn erased_deserialize_u32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_u32(visitor)
}
fn erased_deserialize_u64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_u64(visitor)
}
fn erased_deserialize_u128(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_u128(visitor)
}
fn erased_deserialize_f32(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_f32(visitor)
}
fn erased_deserialize_f64(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_f64(visitor)
}
fn erased_deserialize_char(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_char(visitor)
}
fn erased_deserialize_str(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_str(visitor)
}
fn erased_deserialize_string(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_string(visitor)
}
fn erased_deserialize_bytes(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_bytes(visitor)
}
fn erased_deserialize_byte_buf(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_byte_buf(visitor)
}
fn erased_deserialize_option(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_option(visitor)
}
fn erased_deserialize_unit(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_unit(visitor)
}
fn erased_deserialize_unit_struct(&mut self, name: &'static str, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_unit_struct(name, visitor)
}
fn erased_deserialize_newtype_struct(&mut self, name: &'static str, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_newtype_struct(name, visitor)
}
fn erased_deserialize_seq(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_seq(visitor)
}
fn erased_deserialize_tuple(&mut self, len: usize, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_tuple(len, visitor)
}
fn erased_deserialize_tuple_struct(&mut self, name: &'static str, len: usize, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_tuple_struct(name, len, visitor)
}
fn erased_deserialize_map(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_map(visitor)
}
fn erased_deserialize_struct(&mut self, name: &'static str, fields: &'static [&'static str], visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_struct(name, fields, visitor)
}
fn erased_deserialize_identifier(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_identifier(visitor)
}
fn erased_deserialize_enum(&mut self, name: &'static str, variants: &'static [&'static str], visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_enum(name, variants, visitor)
}
fn erased_deserialize_ignored_any(&mut self, visitor: &mut dyn Visitor<'de>) -> Result<Out, Error> {
(**self).erased_deserialize_ignored_any(visitor)
}
fn erased_is_human_readable(&self) -> bool {
(**self).erased_is_human_readable()
}
}
impl<'de $(, $T)*> Sealed for $ty $(where $($where)*)? {}
};
}
deref_erased_deserializer!(<'de, T> Deserializer<'de> for &mut T where T: ?Sized + Deserializer<'de>);
deref_erased_deserializer!(<'de, T> Deserializer<'de> for Box<T> where T: ?Sized + Deserializer<'de>);
#[cfg(test)]
mod tests {
use super::*;
use alloc::borrow::ToOwned;
use core::fmt::Debug;
use serde_derive::Deserialize;
fn test_json<'de, T>(json: &'de [u8])
where
T: serde::Deserialize<'de> + PartialEq + Debug,
{
let expected: T = serde_json::from_slice(json).unwrap();
{
let mut de = serde_json::Deserializer::from_slice(json);
let de: &mut dyn Deserializer = &mut <dyn Deserializer>::erase(&mut de);
assert_eq!(expected, deserialize::<T>(de).unwrap());
}
{
let mut de = serde_json::Deserializer::from_slice(json);
let mut de: Box<dyn Deserializer> = Box::new(<dyn Deserializer>::erase(&mut de));
assert_eq!(expected, deserialize::<T>(&mut de).unwrap());
}
}
#[test]
fn test_value() {
test_json::<serde_json::Value>(br#"["a", 1, [true], {"a": 1}]"#);
}
#[test]
fn test_struct() {
#[derive(Deserialize, PartialEq, Debug)]
struct S {
f: usize,
}
test_json::<S>(br#"{"f":256}"#);
}
#[test]
fn test_enum() {
#[derive(Deserialize, PartialEq, Debug)]
enum E {
Unit,
Newtype(bool),
Tuple(bool, bool),
Struct { t: bool, f: bool },
}
test_json::<E>(br#""Unit""#);
test_json::<E>(br#"{"Newtype":true}"#);
test_json::<E>(br#"{"Tuple":[true,false]}"#);
test_json::<E>(br#"{"Struct":{"t":true,"f":false}}"#);
}
#[test]
fn test_borrowed() {
let bytes = br#""borrowed""#.to_owned();
test_json::<&str>(&bytes);
}
#[test]
fn assert_deserializer() {
fn assert<'de, T: serde::Deserializer<'de>>() {}
assert::<&mut dyn Deserializer>();
assert::<&mut (dyn Deserializer + Send)>();
assert::<&mut (dyn Deserializer + Sync)>();
assert::<&mut (dyn Deserializer + Send + Sync)>();
assert::<&mut (dyn Deserializer + Sync + Send)>();
assert::<Box<dyn Deserializer>>();
assert::<Box<dyn Deserializer + Send>>();
assert::<Box<dyn Deserializer + Sync>>();
assert::<Box<dyn Deserializer + Send + Sync>>();
assert::<Box<dyn Deserializer + Sync + Send>>();
}
}