2020-05-11 07:36:50 +02:00
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use crate::any::Dynamic;
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2020-05-19 13:03:06 +02:00
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use crate::parser::{FnDef, SharedFnDef};
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2020-05-11 07:36:50 +02:00
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use crate::result::EvalAltResult;
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use crate::stdlib::{boxed::Box, rc::Rc, sync::Arc};
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pub type FnCallArgs<'a> = [&'a mut Dynamic];
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#[cfg(feature = "sync")]
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2020-05-13 15:58:38 +02:00
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pub type FnAny = dyn Fn(&mut FnCallArgs) -> Result<Dynamic, Box<EvalAltResult>> + Send + Sync;
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2020-05-11 07:36:50 +02:00
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#[cfg(not(feature = "sync"))]
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2020-05-13 15:58:38 +02:00
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pub type FnAny = dyn Fn(&mut FnCallArgs) -> Result<Dynamic, Box<EvalAltResult>>;
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2020-05-11 07:36:50 +02:00
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#[cfg(feature = "sync")]
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pub type IteratorFn = dyn Fn(Dynamic) -> Box<dyn Iterator<Item = Dynamic>> + Send + Sync;
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#[cfg(not(feature = "sync"))]
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pub type IteratorFn = dyn Fn(Dynamic) -> Box<dyn Iterator<Item = Dynamic>>;
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2020-05-12 10:32:22 +02:00
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#[cfg(feature = "sync")]
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pub type PrintCallback = dyn Fn(&str) + Send + Sync + 'static;
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#[cfg(not(feature = "sync"))]
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pub type PrintCallback = dyn Fn(&str) + 'static;
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2020-05-15 05:43:32 +02:00
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#[cfg(feature = "sync")]
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pub type ProgressCallback = dyn Fn(u64) -> bool + Send + Sync + 'static;
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#[cfg(not(feature = "sync"))]
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pub type ProgressCallback = dyn Fn(u64) -> bool + 'static;
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2020-05-12 10:32:22 +02:00
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// Define callback function types
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#[cfg(feature = "sync")]
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pub trait ObjectGetCallback<T, U>: Fn(&mut T) -> U + Send + Sync + 'static {}
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#[cfg(feature = "sync")]
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impl<F: Fn(&mut T) -> U + Send + Sync + 'static, T, U> ObjectGetCallback<T, U> for F {}
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#[cfg(not(feature = "sync"))]
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pub trait ObjectGetCallback<T, U>: Fn(&mut T) -> U + 'static {}
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#[cfg(not(feature = "sync"))]
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impl<F: Fn(&mut T) -> U + 'static, T, U> ObjectGetCallback<T, U> for F {}
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#[cfg(feature = "sync")]
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pub trait ObjectSetCallback<T, U>: Fn(&mut T, U) + Send + Sync + 'static {}
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#[cfg(feature = "sync")]
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impl<F: Fn(&mut T, U) + Send + Sync + 'static, T, U> ObjectSetCallback<T, U> for F {}
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#[cfg(not(feature = "sync"))]
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pub trait ObjectSetCallback<T, U>: Fn(&mut T, U) + 'static {}
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#[cfg(not(feature = "sync"))]
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impl<F: Fn(&mut T, U) + 'static, T, U> ObjectSetCallback<T, U> for F {}
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#[cfg(feature = "sync")]
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pub trait ObjectIndexerCallback<T, X, U>: Fn(&mut T, X) -> U + Send + Sync + 'static {}
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#[cfg(feature = "sync")]
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impl<F: Fn(&mut T, X) -> U + Send + Sync + 'static, T, X, U> ObjectIndexerCallback<T, X, U> for F {}
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#[cfg(not(feature = "sync"))]
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pub trait ObjectIndexerCallback<T, X, U>: Fn(&mut T, X) -> U + 'static {}
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#[cfg(not(feature = "sync"))]
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impl<F: Fn(&mut T, X) -> U + 'static, T, X, U> ObjectIndexerCallback<T, X, U> for F {}
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#[cfg(feature = "sync")]
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pub trait IteratorCallback:
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Fn(Dynamic) -> Box<dyn Iterator<Item = Dynamic>> + Send + Sync + 'static
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{
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}
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#[cfg(feature = "sync")]
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impl<F: Fn(Dynamic) -> Box<dyn Iterator<Item = Dynamic>> + Send + Sync + 'static> IteratorCallback
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for F
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{
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}
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#[cfg(not(feature = "sync"))]
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pub trait IteratorCallback: Fn(Dynamic) -> Box<dyn Iterator<Item = Dynamic>> + 'static {}
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#[cfg(not(feature = "sync"))]
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impl<F: Fn(Dynamic) -> Box<dyn Iterator<Item = Dynamic>> + 'static> IteratorCallback for F {}
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2020-05-19 13:03:06 +02:00
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/// A type encapsulating a function callable by Rhai.
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pub enum CallableFunction {
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/// A pure native Rust function with all arguments passed by value.
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Pure(Box<FnAny>),
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/// A native Rust object method with the first argument passed by reference,
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/// and the rest passed by value.
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Method(Box<FnAny>),
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/// An iterator function.
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Iterator(Box<IteratorFn>),
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/// A script-defined function.
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Script(SharedFnDef),
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2020-05-11 12:55:58 +02:00
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}
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2020-05-19 13:03:06 +02:00
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impl CallableFunction {
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/// Is this a pure native Rust function?
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pub fn is_pure(&self) -> bool {
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match self {
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CallableFunction::Pure(_) => true,
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CallableFunction::Method(_)
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| CallableFunction::Iterator(_)
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| CallableFunction::Script(_) => false,
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}
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2020-05-11 12:55:58 +02:00
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}
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2020-05-19 13:03:06 +02:00
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/// Is this a pure native Rust method-call?
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pub fn is_method(&self) -> bool {
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match self {
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CallableFunction::Method(_) => true,
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CallableFunction::Pure(_)
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| CallableFunction::Iterator(_)
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| CallableFunction::Script(_) => false,
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}
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2020-05-11 07:36:50 +02:00
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}
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2020-05-19 13:03:06 +02:00
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/// Is this an iterator function?
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pub fn is_iter(&self) -> bool {
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match self {
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CallableFunction::Iterator(_) => true,
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CallableFunction::Pure(_)
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| CallableFunction::Method(_)
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| CallableFunction::Script(_) => false,
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}
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2020-05-11 07:36:50 +02:00
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}
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2020-05-19 13:03:06 +02:00
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/// Is this a Rhai-scripted function?
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pub fn is_script(&self) -> bool {
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match self {
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CallableFunction::Script(_) => true,
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CallableFunction::Pure(_)
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| CallableFunction::Method(_)
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| CallableFunction::Iterator(_) => false,
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}
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}
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/// Get a reference to a native Rust function.
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///
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/// # Panics
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///
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/// Panics if the `CallableFunction` is not `Pure` or `Method`.
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pub fn get_native_fn(&self) -> &Box<FnAny> {
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match self {
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CallableFunction::Pure(f) | CallableFunction::Method(f) => f,
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CallableFunction::Iterator(_) | CallableFunction::Script(_) => panic!(),
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}
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}
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/// Get a reference to a script-defined function definition.
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///
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/// # Panics
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///
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/// Panics if the `CallableFunction` is not `Script`.
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pub fn get_fn_def(&self) -> &FnDef {
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match self {
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CallableFunction::Pure(_)
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| CallableFunction::Method(_)
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| CallableFunction::Iterator(_) => panic!(),
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CallableFunction::Script(f) => f,
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}
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}
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/// Get a reference to an iterator function.
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///
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/// # Panics
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///
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/// Panics if the `CallableFunction` is not `Iterator`.
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pub fn get_iter_fn(&self) -> &Box<IteratorFn> {
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match self {
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CallableFunction::Pure(_)
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| CallableFunction::Method(_)
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| CallableFunction::Script(_) => panic!(),
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CallableFunction::Iterator(f) => f,
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}
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2020-05-11 07:36:50 +02:00
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}
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}
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2020-05-19 13:03:06 +02:00
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/// A callable function.
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2020-05-13 13:21:42 +02:00
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#[cfg(not(feature = "sync"))]
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2020-05-19 13:03:06 +02:00
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pub type SharedFunction = Rc<CallableFunction>;
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/// A callable function.
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2020-05-13 13:21:42 +02:00
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#[cfg(feature = "sync")]
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2020-05-19 13:03:06 +02:00
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pub type SharedFunction = Arc<CallableFunction>;
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