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use crate::{
FromValue, OwnedRef, Panic, RawOwnedRef, ReflectValueType, Shared, ToValue, UnsafeFromValue,
Value, ValueError, ValueErrorKind, ValueType, ValueTypeInfo, VmError,
};
use std::fmt;
use std::io;
decl_external!(fmt::Error);
decl_external!(io::Error);
impl<T, E> ReflectValueType for Result<T, E> {
type Owned = Result<T, E>;
fn value_type() -> ValueType {
ValueType::StaticType(crate::RESULT_TYPE)
}
fn value_type_info() -> ValueTypeInfo {
ValueTypeInfo::StaticType(crate::RESULT_TYPE)
}
}
impl<T, E> ReflectValueType for &Result<T, E> {
type Owned = Result<T, E>;
fn value_type() -> ValueType {
ValueType::StaticType(crate::RESULT_TYPE)
}
fn value_type_info() -> ValueTypeInfo {
ValueTypeInfo::StaticType(crate::RESULT_TYPE)
}
}
impl<T> ToValue for Result<T, Panic>
where
T: ToValue,
{
fn to_value(self) -> Result<Value, ValueError> {
match self {
Ok(value) => Ok(value.to_value()?),
Err(reason) => Err(ValueError::from(ValueErrorKind::Panic { reason })),
}
}
}
impl<T> ToValue for Result<T, ValueError>
where
T: ToValue,
{
fn to_value(self) -> Result<Value, ValueError> {
match self {
Ok(value) => Ok(value.to_value()?),
Err(error) => Err(error),
}
}
}
impl<T> ToValue for Result<T, VmError>
where
T: ToValue,
{
fn to_value(self) -> Result<Value, ValueError> {
match self {
Ok(value) => Ok(value.to_value()?),
Err(error) => Err(ValueError::from(ValueErrorKind::VmError { error })),
}
}
}
impl<T, E> ToValue for Result<T, E>
where
T: ToValue,
E: ToValue,
{
fn to_value(self) -> Result<Value, ValueError> {
Ok(match self {
Ok(ok) => {
let ok = ok.to_value()?;
Value::Result(Shared::new(Ok(ok)))
}
Err(err) => {
let err = err.to_value()?;
Value::Result(Shared::new(Err(err)))
}
})
}
}
impl<T, E> FromValue for Result<T, E>
where
T: FromValue,
E: FromValue,
{
fn from_value(value: Value) -> Result<Self, ValueError> {
Ok(match value.into_result()?.take()? {
Ok(ok) => Ok(T::from_value(ok)?),
Err(err) => Err(E::from_value(err)?),
})
}
}
impl UnsafeFromValue for &Result<Value, Value> {
type Output = *const Result<Value, Value>;
type Guard = RawOwnedRef;
unsafe fn unsafe_from_value(value: Value) -> Result<(Self::Output, Self::Guard), ValueError> {
let result = value.into_result()?;
let result = result.owned_ref()?;
Ok(OwnedRef::into_raw(result))
}
unsafe fn to_arg(output: Self::Output) -> Self {
&*output
}
}