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use rusty_v8 as v8;
use std::any::TypeId;
/// SerializablePkg exists to provide a fast path for op returns,
/// allowing them to avoid boxing primtives (ints/floats/bool/unit/...)
pub enum SerializablePkg {
MinValue(MinValue),
Serializable(Box<dyn serde_v8::Serializable>),
}
impl SerializablePkg {
pub fn to_v8<'a>(
&self,
scope: &mut v8::HandleScope<'a>,
) -> Result<v8::Local<'a, v8::Value>, serde_v8::Error> {
match &*self {
Self::MinValue(x) => serde_v8::to_v8(scope, x),
Self::Serializable(x) => x.to_v8(scope),
}
}
}
/// MinValue serves as a lightweight serializable wrapper around primitives
/// so that we can use them for async values
#[derive(Clone, Copy)]
pub enum MinValue {
Unit(()),
Bool(bool),
Int8(i8),
Int16(i16),
Int32(i32),
Int64(i64),
UInt8(u8),
UInt16(u16),
UInt32(u32),
UInt64(u64),
Float32(f32),
Float64(f64),
}
impl serde::Serialize for MinValue {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
match *self {
Self::Unit(_) => serializer.serialize_unit(),
Self::Bool(x) => serializer.serialize_bool(x),
Self::Int8(x) => serializer.serialize_i8(x),
Self::Int16(x) => serializer.serialize_i16(x),
Self::Int32(x) => serializer.serialize_i32(x),
Self::Int64(x) => serializer.serialize_i64(x),
Self::UInt8(x) => serializer.serialize_u8(x),
Self::UInt16(x) => serializer.serialize_u16(x),
Self::UInt32(x) => serializer.serialize_u32(x),
Self::UInt64(x) => serializer.serialize_u64(x),
Self::Float32(x) => serializer.serialize_f32(x),
Self::Float64(x) => serializer.serialize_f64(x),
}
}
}
impl<T: serde::Serialize + 'static> From<T> for SerializablePkg {
fn from(x: T) -> Self {
let tid = TypeId::of::<T>();
if tid == TypeId::of::<()>() {
Self::MinValue(MinValue::Unit(()))
} else if tid == TypeId::of::<bool>() {
Self::MinValue(MinValue::Bool(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<i8>() {
Self::MinValue(MinValue::Int8(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<i16>() {
Self::MinValue(MinValue::Int16(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<i32>() {
Self::MinValue(MinValue::Int32(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<i64>() {
Self::MinValue(MinValue::Int64(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<u8>() {
Self::MinValue(MinValue::UInt8(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<u16>() {
Self::MinValue(MinValue::UInt16(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<u32>() {
Self::MinValue(MinValue::UInt32(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<u64>() {
Self::MinValue(MinValue::UInt64(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<f32>() {
Self::MinValue(MinValue::Float32(unsafe { std::mem::transmute_copy(&x) }))
} else if tid == TypeId::of::<f64>() {
Self::MinValue(MinValue::Float64(unsafe { std::mem::transmute_copy(&x) }))
} else {
Self::Serializable(Box::new(x))
}
}
}
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