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use crate::{Any, AnyObj, Panic, Shared, Value, VmError, VmErrorKind};
pub trait ToValue: Sized {
fn to_value(self) -> Result<Value, VmError>;
}
pub trait UnsafeToValue: Sized {
type Guard: 'static;
unsafe fn unsafe_to_value(self) -> Result<(Value, Self::Guard), VmError>;
}
impl<T> ToValue for T
where
T: Any,
{
fn to_value(self) -> Result<Value, VmError> {
Ok(Value::from(AnyObj::new(self)))
}
}
impl<T> UnsafeToValue for T
where
T: ToValue,
{
type Guard = ();
unsafe fn unsafe_to_value(self) -> Result<(Value, Self::Guard), VmError> {
Ok((self.to_value()?, ()))
}
}
impl ToValue for &Value {
fn to_value(self) -> Result<Value, VmError> {
Ok(self.clone())
}
}
impl<T> ToValue for Option<T>
where
T: ToValue,
{
fn to_value(self) -> Result<Value, VmError> {
Ok(Value::from(Shared::new(match self {
Some(some) => {
let value = some.to_value()?;
Some(value)
}
None => None,
})))
}
}
impl ToValue for Box<str> {
fn to_value(self) -> Result<Value, VmError> {
Ok(Value::from(Shared::new(self.to_string())))
}
}
impl<T> ToValue for Result<T, Panic>
where
T: ToValue,
{
fn to_value(self) -> Result<Value, VmError> {
match self {
Ok(value) => Ok(value.to_value()?),
Err(reason) => Err(VmError::from(VmErrorKind::Panic { reason })),
}
}
}
impl<T> ToValue for Result<T, VmError>
where
T: ToValue,
{
fn to_value(self) -> Result<Value, VmError> {
match self {
Ok(value) => Ok(value.to_value()?),
Err(error) => Err(error),
}
}
}
impl<T, E> ToValue for Result<T, E>
where
T: ToValue,
E: ToValue,
{
fn to_value(self) -> Result<Value, VmError> {
Ok(match self {
Ok(ok) => {
let ok = ok.to_value()?;
Value::from(Shared::new(Ok(ok)))
}
Err(err) => {
let err = err.to_value()?;
Value::from(Shared::new(Err(err)))
}
})
}
}
macro_rules! number_value_trait {
($ty:ty) => {
impl ToValue for $ty {
fn to_value(self) -> Result<Value, $crate::VmError> {
use std::convert::TryInto as _;
match self.try_into() {
Ok(number) => Ok(Value::Integer(number)),
Err(..) => Err($crate::VmError::from(
$crate::VmErrorKind::IntegerToValueCoercionError {
from: $crate::VmIntegerRepr::from(self),
to: std::any::type_name::<i64>(),
},
)),
}
}
}
};
}
number_value_trait!(u16);
number_value_trait!(u32);
number_value_trait!(u64);
number_value_trait!(u128);
number_value_trait!(usize);
number_value_trait!(i8);
number_value_trait!(i16);
number_value_trait!(i32);
number_value_trait!(i128);
number_value_trait!(isize);
impl ToValue for f32 {
fn to_value(self) -> Result<Value, VmError> {
Ok(Value::Float(self as f64))
}
}
macro_rules! impl_map {
($ty:ty) => {
impl<T> $crate::ToValue for $ty
where
T: $crate::ToValue,
{
fn to_value(self) -> Result<$crate::Value, $crate::VmError> {
let mut output = crate::Object::with_capacity(self.len());
for (key, value) in self {
output.insert(key, value.to_value()?);
}
Ok($crate::Value::from($crate::Shared::new(output)))
}
}
};
}
impl_map!(std::collections::HashMap<String, T>);