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use std::fmt;
use std::marker::PhantomData;
pub const FIELD: &str = "$__v8_magic_value";
pub const NAME: &str = "$__v8_magic_Value";
pub struct Value<'s> {
pub v8_value: v8::Local<'s, v8::Value>,
}
impl<'s> From<v8::Local<'s, v8::Value>> for Value<'s> {
fn from(v8_value: v8::Local<'s, v8::Value>) -> Self {
Self { v8_value }
}
}
impl<'s> From<Value<'s>> for v8::Local<'s, v8::Value> {
fn from(v: Value<'s>) -> Self {
v.v8_value
}
}
impl serde::Serialize for Value<'_> {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
use serde::ser::SerializeStruct;
let mut s = serializer.serialize_struct(NAME, 1)?;
let mv = Value {
v8_value: self.v8_value,
};
let hack: u64 = unsafe { std::mem::transmute(mv) };
s.serialize_field(FIELD, &hack)?;
s.end()
}
}
impl<'de, 's> serde::Deserialize<'de> for Value<'s> {
fn deserialize<D>(deserializer: D) -> Result<Value<'s>, D::Error>
where
D: serde::Deserializer<'de>,
{
struct ValueVisitor<'s> {
p1: PhantomData<&'s ()>,
}
impl<'de, 's> serde::de::Visitor<'de> for ValueVisitor<'s> {
type Value = Value<'s>;
fn expecting(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
formatter.write_str("a v8::Value")
}
fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
where
E: serde::de::Error,
{
let mv: Value<'s> = unsafe { std::mem::transmute(v) };
Ok(mv)
}
}
static FIELDS: [&str; 1] = [FIELD];
let visitor = ValueVisitor { p1: PhantomData };
deserializer.deserialize_struct(NAME, &FIELDS, visitor)
}
}