138 lines
3.9 KiB
Rust
138 lines
3.9 KiB
Rust
use crate::any::Dynamic;
|
|
use crate::parser::FnDef;
|
|
use crate::result::EvalAltResult;
|
|
|
|
use crate::stdlib::{boxed::Box, rc::Rc, sync::Arc};
|
|
|
|
#[cfg(feature = "sync")]
|
|
pub trait SendSync: Send + Sync {}
|
|
#[cfg(feature = "sync")]
|
|
impl<T: Send + Sync> SendSync for T {}
|
|
|
|
#[cfg(not(feature = "sync"))]
|
|
pub trait SendSync {}
|
|
#[cfg(not(feature = "sync"))]
|
|
impl<T> SendSync for T {}
|
|
|
|
#[cfg(not(feature = "sync"))]
|
|
pub type Shared<T> = Rc<T>;
|
|
#[cfg(feature = "sync")]
|
|
pub type Shared<T> = Arc<T>;
|
|
|
|
pub fn shared_make_mut<T: Clone>(value: &mut Shared<T>) -> &mut T {
|
|
#[cfg(not(feature = "sync"))]
|
|
{
|
|
Rc::make_mut(value)
|
|
}
|
|
#[cfg(feature = "sync")]
|
|
{
|
|
Arc::make_mut(value)
|
|
}
|
|
}
|
|
|
|
pub fn shared_unwrap<T: Clone>(value: Shared<T>) -> Result<T, Shared<T>> {
|
|
#[cfg(not(feature = "sync"))]
|
|
{
|
|
Rc::try_unwrap(value)
|
|
}
|
|
#[cfg(feature = "sync")]
|
|
{
|
|
Arc::try_unwrap(value)
|
|
}
|
|
}
|
|
|
|
pub type FnCallArgs<'a> = [&'a mut Dynamic];
|
|
|
|
#[cfg(not(feature = "sync"))]
|
|
pub type FnAny = dyn Fn(&mut FnCallArgs) -> Result<Dynamic, Box<EvalAltResult>>;
|
|
#[cfg(feature = "sync")]
|
|
pub type FnAny = dyn Fn(&mut FnCallArgs) -> Result<Dynamic, Box<EvalAltResult>> + Send + Sync;
|
|
|
|
pub type IteratorFn = fn(Dynamic) -> Box<dyn Iterator<Item = Dynamic>>;
|
|
|
|
/// A type encapsulating a function callable by Rhai.
|
|
#[derive(Clone)]
|
|
pub enum CallableFunction {
|
|
/// A pure native Rust function with all arguments passed by value.
|
|
Pure(Shared<FnAny>),
|
|
/// A native Rust object method with the first argument passed by reference,
|
|
/// and the rest passed by value.
|
|
Method(Shared<FnAny>),
|
|
/// An iterator function.
|
|
Iterator(IteratorFn),
|
|
/// A script-defined function.
|
|
Script(Shared<FnDef>),
|
|
}
|
|
|
|
impl CallableFunction {
|
|
/// Is this a pure native Rust function?
|
|
pub fn is_pure(&self) -> bool {
|
|
match self {
|
|
Self::Pure(_) => true,
|
|
Self::Method(_) | Self::Iterator(_) | Self::Script(_) => false,
|
|
}
|
|
}
|
|
/// Is this a pure native Rust method-call?
|
|
pub fn is_method(&self) -> bool {
|
|
match self {
|
|
Self::Method(_) => true,
|
|
Self::Pure(_) | Self::Iterator(_) | Self::Script(_) => false,
|
|
}
|
|
}
|
|
/// Is this an iterator function?
|
|
pub fn is_iter(&self) -> bool {
|
|
match self {
|
|
Self::Iterator(_) => true,
|
|
Self::Pure(_) | Self::Method(_) | Self::Script(_) => false,
|
|
}
|
|
}
|
|
/// Is this a Rhai-scripted function?
|
|
pub fn is_script(&self) -> bool {
|
|
match self {
|
|
Self::Script(_) => true,
|
|
Self::Pure(_) | Self::Method(_) | Self::Iterator(_) => false,
|
|
}
|
|
}
|
|
/// Get a reference to a native Rust function.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the `CallableFunction` is not `Pure` or `Method`.
|
|
pub fn get_native_fn(&self) -> &FnAny {
|
|
match self {
|
|
Self::Pure(f) | Self::Method(f) => f.as_ref(),
|
|
Self::Iterator(_) | Self::Script(_) => panic!(),
|
|
}
|
|
}
|
|
/// Get a reference to a script-defined function definition.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the `CallableFunction` is not `Script`.
|
|
pub fn get_fn_def(&self) -> &FnDef {
|
|
match self {
|
|
Self::Pure(_) | Self::Method(_) | Self::Iterator(_) => panic!(),
|
|
Self::Script(f) => f,
|
|
}
|
|
}
|
|
/// Get a reference to an iterator function.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the `CallableFunction` is not `Iterator`.
|
|
pub fn get_iter_fn(&self) -> IteratorFn {
|
|
match self {
|
|
Self::Iterator(f) => *f,
|
|
Self::Pure(_) | Self::Method(_) | Self::Script(_) => panic!(),
|
|
}
|
|
}
|
|
/// Create a new `CallableFunction::Pure`.
|
|
pub fn from_pure(func: Box<FnAny>) -> Self {
|
|
Self::Pure(func.into())
|
|
}
|
|
/// Create a new `CallableFunction::Method`.
|
|
pub fn from_method(func: Box<FnAny>) -> Self {
|
|
Self::Method(func.into())
|
|
}
|
|
}
|