2048 lines
74 KiB
Rust
2048 lines
74 KiB
Rust
//! Helper module which defines the [`Any`] trait to to allow dynamic value handling.
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use crate::fn_native::SendSync;
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use crate::r#unsafe::{unsafe_cast_box, unsafe_try_cast};
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use crate::{FnPtr, ImmutableString, INT};
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#[cfg(feature = "no_std")]
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use std::prelude::v1::*;
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use std::{
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any::{type_name, Any, TypeId},
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fmt,
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hash::{Hash, Hasher},
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ops::{Deref, DerefMut},
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};
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#[cfg(not(feature = "no_float"))]
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use crate::{ast::FloatWrapper, FLOAT};
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#[cfg(feature = "decimal")]
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use rust_decimal::Decimal;
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#[cfg(not(feature = "no_index"))]
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use crate::Array;
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#[cfg(not(feature = "no_object"))]
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use crate::Map;
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#[cfg(not(feature = "no_std"))]
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#[cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))]
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use std::time::Instant;
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use fmt::Debug;
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#[cfg(not(feature = "no_std"))]
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#[cfg(any(target_arch = "wasm32", target_arch = "wasm64"))]
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use instant::Instant;
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/// The message: never fails because the type was checked
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const CHECKED: &str = "never fails because the type was checked";
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mod private {
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use crate::fn_native::SendSync;
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use std::any::Any;
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/// A sealed trait that prevents other crates from implementing [`Variant`].
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pub trait Sealed {}
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impl<T: Any + Clone + SendSync> Sealed for T {}
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}
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/// _(internals)_ Trait to represent any type.
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/// Exported under the `internals` feature only.
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///
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/// This trait is sealed and cannot be implemented.
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///
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/// Currently, [`Variant`] is not [`Send`] nor [`Sync`], so it can practically be any type.
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/// Turn on the `sync` feature to restrict it to only types that implement [`Send`] `+` [`Sync`].
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#[cfg(not(feature = "sync"))]
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pub trait Variant: Any + private::Sealed {
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/// Convert this [`Variant`] trait object to [`&dyn Any`][Any].
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#[must_use]
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fn as_any(&self) -> &dyn Any;
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/// Convert this [`Variant`] trait object to [`&mut dyn Any`][Any].
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#[must_use]
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fn as_mut_any(&mut self) -> &mut dyn Any;
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/// Convert this [`Variant`] trait object to an [`Any`] trait object.
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#[must_use]
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fn as_box_any(self: Box<Self>) -> Box<dyn Any>;
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/// Get the name of this type.
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#[must_use]
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fn type_name(&self) -> &'static str;
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/// Convert into [`Dynamic`].
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#[must_use]
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fn into_dynamic(self) -> Dynamic;
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/// Clone into [`Dynamic`].
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#[must_use]
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fn clone_into_dynamic(&self) -> Dynamic;
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}
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/// _(internals)_ Trait to represent any type.
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/// Exported under the `internals` feature only.
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///
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/// This trait is sealed and cannot be implemented.
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#[cfg(feature = "sync")]
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pub trait Variant: Any + Send + Sync + private::Sealed {
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/// Convert this [`Variant`] trait object to [`&dyn Any`][Any].
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#[must_use]
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fn as_any(&self) -> &dyn Any;
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/// Convert this [`Variant`] trait object to [`&mut dyn Any`][Any].
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#[must_use]
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fn as_mut_any(&mut self) -> &mut dyn Any;
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/// Convert this [`Variant`] trait object to an [`Any`] trait object.
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#[must_use]
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fn as_box_any(self: Box<Self>) -> Box<dyn Any>;
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/// Get the name of this type.
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#[must_use]
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fn type_name(&self) -> &'static str;
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/// Convert into [`Dynamic`].
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#[must_use]
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fn into_dynamic(self) -> Dynamic;
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/// Clone into [`Dynamic`].
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#[must_use]
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fn clone_into_dynamic(&self) -> Dynamic;
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}
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impl<T: Any + Clone + SendSync> Variant for T {
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#[inline(always)]
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fn as_any(&self) -> &dyn Any {
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self
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}
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#[inline(always)]
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fn as_mut_any(&mut self) -> &mut dyn Any {
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self
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}
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#[inline(always)]
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fn as_box_any(self: Box<Self>) -> Box<dyn Any> {
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self
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}
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#[inline(always)]
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fn type_name(&self) -> &'static str {
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type_name::<T>()
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}
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#[inline(always)]
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fn into_dynamic(self) -> Dynamic {
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Dynamic::from(self)
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}
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#[inline(always)]
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fn clone_into_dynamic(&self) -> Dynamic {
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Dynamic::from(self.clone())
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}
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}
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impl dyn Variant {
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/// Is this [`Variant`] a specific type?
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#[inline(always)]
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#[must_use]
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pub fn is<T: Any>(&self) -> bool {
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TypeId::of::<T>() == self.type_id()
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}
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}
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/// Modes of access.
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#[derive(Debug, Eq, PartialEq, Hash, Copy, Clone)]
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pub enum AccessMode {
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/// Mutable.
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ReadWrite,
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/// Immutable.
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ReadOnly,
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}
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/// Arbitrary data attached to a [`Dynamic`] value.
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#[cfg(target_pointer_width = "64")]
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pub type Tag = i32;
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/// Arbitrary data attached to a [`Dynamic`] value.
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#[cfg(target_pointer_width = "32")]
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pub type Tag = i16;
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/// Default tag value for [`Dynamic`].
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const DEFAULT_TAG_VALUE: Tag = 0;
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/// Dynamic type containing any value.
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pub struct Dynamic(pub(crate) Union);
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/// Internal [`Dynamic`] representation.
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///
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/// Most variants are boxed to reduce the size.
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pub enum Union {
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/// The Unit value - ().
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Unit((), Tag, AccessMode),
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/// A boolean value.
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Bool(bool, Tag, AccessMode),
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/// An [`ImmutableString`] value.
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Str(ImmutableString, Tag, AccessMode),
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/// A character value.
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Char(char, Tag, AccessMode),
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/// An integer value.
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Int(INT, Tag, AccessMode),
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/// A floating-point value.
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///
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/// Not available under `no_float`.
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#[cfg(not(feature = "no_float"))]
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Float(FloatWrapper<FLOAT>, Tag, AccessMode),
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/// _(decimal)_ A fixed-precision decimal value.
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/// Exported under the `decimal` feature only.
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#[cfg(feature = "decimal")]
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Decimal(Box<Decimal>, Tag, AccessMode),
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/// An array value.
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///
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/// Not available under `no_index`.
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#[cfg(not(feature = "no_index"))]
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Array(Box<Array>, Tag, AccessMode),
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/// An object map value.
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///
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/// Not available under `no_object`.
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#[cfg(not(feature = "no_object"))]
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Map(Box<Map>, Tag, AccessMode),
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/// A function pointer.
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FnPtr(Box<FnPtr>, Tag, AccessMode),
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/// A timestamp value.
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///
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/// Not available under `no-std`.
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#[cfg(not(feature = "no_std"))]
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TimeStamp(Box<Instant>, Tag, AccessMode),
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/// Any type as a trait object.
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#[allow(clippy::redundant_allocation)]
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Variant(Box<Box<dyn Variant>>, Tag, AccessMode),
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/// A _shared_ value of any type.
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///
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/// Not available under `no_closure`.
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#[cfg(not(feature = "no_closure"))]
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Shared(crate::Shared<crate::Locked<Dynamic>>, Tag, AccessMode),
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}
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/// _(internals)_ Lock guard for reading a [`Dynamic`].
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/// Exported under the `internals` feature only.
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///
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/// This type provides transparent interoperability between normal [`Dynamic`] and shared
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/// [`Dynamic`] values.
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///
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/// # Volatile Data Structure
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///
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/// This type is volatile and may change.
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#[derive(Debug)]
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pub struct DynamicReadLock<'d, T: Clone>(DynamicReadLockInner<'d, T>);
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/// Different types of read guards for [`DynamicReadLock`].
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#[derive(Debug)]
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enum DynamicReadLockInner<'d, T: Clone> {
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/// A simple reference to a non-shared value.
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Reference(&'d T),
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/// A read guard to a shared [`RefCell`][std::cell::RefCell].
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#[cfg(not(feature = "no_closure"))]
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#[cfg(not(feature = "sync"))]
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Guard(std::cell::Ref<'d, Dynamic>),
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/// A read guard to a shared [`RwLock`][std::sync::RwLock].
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#[cfg(not(feature = "no_closure"))]
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#[cfg(feature = "sync")]
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Guard(std::sync::RwLockReadGuard<'d, Dynamic>),
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}
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impl<'d, T: Any + Clone> Deref for DynamicReadLock<'d, T> {
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type Target = T;
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#[inline(always)]
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fn deref(&self) -> &Self::Target {
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match self.0 {
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DynamicReadLockInner::Reference(ref reference) => *reference,
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#[cfg(not(feature = "no_closure"))]
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DynamicReadLockInner::Guard(ref guard) => guard.downcast_ref().expect(
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"never fails because the read guard was created after checking the data type",
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),
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}
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}
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}
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/// _(internals)_ Lock guard for writing a [`Dynamic`].
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/// Exported under the `internals` feature only.
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///
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/// This type provides transparent interoperability between normal [`Dynamic`] and shared
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/// [`Dynamic`] values.
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///
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/// # Volatile Data Structure
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///
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/// This type is volatile and may change.
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#[derive(Debug)]
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pub struct DynamicWriteLock<'d, T: Clone>(DynamicWriteLockInner<'d, T>);
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/// Different types of write guards for [`DynamicReadLock`].
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#[derive(Debug)]
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enum DynamicWriteLockInner<'d, T: Clone> {
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/// A simple mutable reference to a non-shared value.
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Reference(&'d mut T),
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/// A write guard to a shared [`RefCell`][std::cell::RefCell].
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#[cfg(not(feature = "no_closure"))]
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#[cfg(not(feature = "sync"))]
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Guard(std::cell::RefMut<'d, Dynamic>),
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/// A write guard to a shared [`RwLock`][std::sync::RwLock].
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#[cfg(not(feature = "no_closure"))]
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#[cfg(feature = "sync")]
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Guard(std::sync::RwLockWriteGuard<'d, Dynamic>),
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}
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impl<'d, T: Any + Clone> Deref for DynamicWriteLock<'d, T> {
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type Target = T;
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#[inline(always)]
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fn deref(&self) -> &Self::Target {
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match self.0 {
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DynamicWriteLockInner::Reference(ref reference) => *reference,
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#[cfg(not(feature = "no_closure"))]
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DynamicWriteLockInner::Guard(ref guard) => guard.downcast_ref().expect(
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"never fails because the write guard was created after checking the data type",
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),
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}
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}
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}
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impl<'d, T: Any + Clone> DerefMut for DynamicWriteLock<'d, T> {
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#[inline(always)]
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fn deref_mut(&mut self) -> &mut Self::Target {
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match self.0 {
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DynamicWriteLockInner::Reference(ref mut reference) => *reference,
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#[cfg(not(feature = "no_closure"))]
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DynamicWriteLockInner::Guard(ref mut guard) => guard.downcast_mut().expect(
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"never fails because the write guard was created after checking the data type",
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),
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}
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}
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}
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impl Dynamic {
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/// Get the arbitrary data attached to this [`Dynamic`].
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#[must_use]
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pub const fn tag(&self) -> Tag {
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match self.0 {
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Union::Unit(_, tag, _)
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| Union::Bool(_, tag, _)
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| Union::Str(_, tag, _)
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| Union::Char(_, tag, _)
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| Union::Int(_, tag, _)
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| Union::FnPtr(_, tag, _)
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| Union::Variant(_, tag, _) => tag,
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#[cfg(not(feature = "no_float"))]
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Union::Float(_, tag, _) => tag,
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#[cfg(feature = "decimal")]
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Union::Decimal(_, tag, _) => tag,
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#[cfg(not(feature = "no_index"))]
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Union::Array(_, tag, _) => tag,
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#[cfg(not(feature = "no_object"))]
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Union::Map(_, tag, _) => tag,
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#[cfg(not(feature = "no_std"))]
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Union::TimeStamp(_, tag, _) => tag,
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#[cfg(not(feature = "no_closure"))]
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Union::Shared(_, tag, _) => tag,
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}
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}
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/// Attach arbitrary data to this [`Dynamic`].
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pub fn set_tag(&mut self, value: Tag) -> &mut Self {
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match self.0 {
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Union::Unit(_, ref mut tag, _)
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| Union::Bool(_, ref mut tag, _)
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| Union::Str(_, ref mut tag, _)
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| Union::Char(_, ref mut tag, _)
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| Union::Int(_, ref mut tag, _)
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| Union::FnPtr(_, ref mut tag, _)
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| Union::Variant(_, ref mut tag, _) => *tag = value,
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#[cfg(not(feature = "no_float"))]
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Union::Float(_, ref mut tag, _) => *tag = value,
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#[cfg(feature = "decimal")]
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Union::Decimal(_, ref mut tag, _) => *tag = value,
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#[cfg(not(feature = "no_index"))]
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Union::Array(_, ref mut tag, _) => *tag = value,
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#[cfg(not(feature = "no_object"))]
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Union::Map(_, ref mut tag, _) => *tag = value,
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#[cfg(not(feature = "no_std"))]
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Union::TimeStamp(_, ref mut tag, _) => *tag = value,
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#[cfg(not(feature = "no_closure"))]
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Union::Shared(_, ref mut tag, _) => *tag = value,
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}
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self
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}
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/// Does this [`Dynamic`] hold a variant data type
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/// instead of one of the supported system primitive types?
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#[inline(always)]
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#[must_use]
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pub const fn is_variant(&self) -> bool {
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matches!(self.0, Union::Variant(_, _, _))
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}
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/// Is the value held by this [`Dynamic`] shared?
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///
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/// Not available under `no_closure`.
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#[cfg(not(feature = "no_closure"))]
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#[inline(always)]
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#[must_use]
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pub const fn is_shared(&self) -> bool {
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match self.0 {
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#[cfg(not(feature = "no_closure"))]
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Union::Shared(_, _, _) => true,
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_ => false,
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}
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}
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/// Is the value held by this [`Dynamic`] a particular type?
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///
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/// If the [`Dynamic`] is a shared variant checking is performed on
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/// top of its internal value.
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#[inline(always)]
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#[must_use]
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pub fn is<T: Any + Clone>(&self) -> bool {
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if TypeId::of::<T>() == TypeId::of::<String>() {
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self.type_id() == TypeId::of::<ImmutableString>()
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} else {
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self.type_id() == TypeId::of::<T>()
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}
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}
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/// Get the [`TypeId`] of the value held by this [`Dynamic`].
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///
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/// # Panics or Deadlocks When Value is Shared
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///
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/// Under the `sync` feature, this call may deadlock, or [panic](https://doc.rust-lang.org/std/sync/struct.RwLock.html#panics-1).
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/// Otherwise, this call panics if the data is currently borrowed for write.
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#[must_use]
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pub fn type_id(&self) -> TypeId {
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match self.0 {
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Union::Unit(_, _, _) => TypeId::of::<()>(),
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Union::Bool(_, _, _) => TypeId::of::<bool>(),
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Union::Str(_, _, _) => TypeId::of::<ImmutableString>(),
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Union::Char(_, _, _) => TypeId::of::<char>(),
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Union::Int(_, _, _) => TypeId::of::<INT>(),
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#[cfg(not(feature = "no_float"))]
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Union::Float(_, _, _) => TypeId::of::<FLOAT>(),
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#[cfg(feature = "decimal")]
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Union::Decimal(_, _, _) => TypeId::of::<Decimal>(),
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#[cfg(not(feature = "no_index"))]
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Union::Array(_, _, _) => TypeId::of::<Array>(),
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#[cfg(not(feature = "no_object"))]
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Union::Map(_, _, _) => TypeId::of::<Map>(),
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Union::FnPtr(_, _, _) => TypeId::of::<FnPtr>(),
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#[cfg(not(feature = "no_std"))]
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Union::TimeStamp(_, _, _) => TypeId::of::<Instant>(),
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Union::Variant(ref value, _, _) => (***value).type_id(),
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#[cfg(not(feature = "no_closure"))]
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#[cfg(not(feature = "sync"))]
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Union::Shared(ref cell, _, _) => (*cell.borrow()).type_id(),
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#[cfg(not(feature = "no_closure"))]
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#[cfg(feature = "sync")]
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Union::Shared(ref cell, _, _) => (*cell.read().unwrap()).type_id(),
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}
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}
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/// Get the name of the type of the value held by this [`Dynamic`].
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///
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/// # Panics or Deadlocks When Value is Shared
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///
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/// Under the `sync` feature, this call may deadlock, or [panic](https://doc.rust-lang.org/std/sync/struct.RwLock.html#panics-1).
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/// Otherwise, this call panics if the data is currently borrowed for write.
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#[must_use]
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pub fn type_name(&self) -> &'static str {
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match self.0 {
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Union::Unit(_, _, _) => "()",
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Union::Bool(_, _, _) => "bool",
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Union::Str(_, _, _) => "string",
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Union::Char(_, _, _) => "char",
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Union::Int(_, _, _) => type_name::<INT>(),
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#[cfg(not(feature = "no_float"))]
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Union::Float(_, _, _) => type_name::<FLOAT>(),
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#[cfg(feature = "decimal")]
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Union::Decimal(_, _, _) => "decimal",
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#[cfg(not(feature = "no_index"))]
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Union::Array(_, _, _) => "array",
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#[cfg(not(feature = "no_object"))]
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Union::Map(_, _, _) => "map",
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Union::FnPtr(_, _, _) => "Fn",
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#[cfg(not(feature = "no_std"))]
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Union::TimeStamp(_, _, _) => "timestamp",
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Union::Variant(ref value, _, _) => (***value).type_name(),
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#[cfg(not(feature = "no_closure"))]
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#[cfg(not(feature = "sync"))]
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Union::Shared(ref cell, _, _) => cell
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.try_borrow()
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.map(|v| (*v).type_name())
|
|
.unwrap_or("<shared>"),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(feature = "sync")]
|
|
Union::Shared(ref cell, _, _) => (*cell.read().unwrap()).type_name(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Hash for Dynamic {
|
|
/// Hash the [`Dynamic`] value.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the [`Dynamic`] value contains an unrecognized trait object.
|
|
fn hash<H: Hasher>(&self, state: &mut H) {
|
|
std::mem::discriminant(&self.0).hash(state);
|
|
|
|
match self.0 {
|
|
Union::Unit(_, _, _) => ().hash(state),
|
|
Union::Bool(ref b, _, _) => b.hash(state),
|
|
Union::Str(ref s, _, _) => s.hash(state),
|
|
Union::Char(ref c, _, _) => c.hash(state),
|
|
Union::Int(ref i, _, _) => i.hash(state),
|
|
#[cfg(not(feature = "no_float"))]
|
|
Union::Float(ref f, _, _) => f.hash(state),
|
|
#[cfg(feature = "decimal")]
|
|
Union::Decimal(ref d, _, _) => d.hash(state),
|
|
#[cfg(not(feature = "no_index"))]
|
|
Union::Array(ref a, _, _) => a.as_ref().hash(state),
|
|
#[cfg(not(feature = "no_object"))]
|
|
Union::Map(ref m, _, _) => m.as_ref().hash(state),
|
|
Union::FnPtr(ref f, _, _) => f.hash(state),
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(not(feature = "sync"))]
|
|
Union::Shared(ref cell, _, _) => (*cell.borrow()).hash(state),
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(feature = "sync")]
|
|
Union::Shared(ref cell, _, _) => (*cell.read().unwrap()).hash(state),
|
|
|
|
Union::Variant(ref _value, _, _) => {
|
|
#[cfg(not(feature = "only_i32"))]
|
|
#[cfg(not(feature = "only_i64"))]
|
|
{
|
|
let value_any = (***_value).as_any();
|
|
let type_id = value_any.type_id();
|
|
|
|
if type_id == TypeId::of::<u8>() {
|
|
TypeId::of::<u8>().hash(state);
|
|
value_any.downcast_ref::<u8>().expect(CHECKED).hash(state);
|
|
} else if type_id == TypeId::of::<u16>() {
|
|
TypeId::of::<u16>().hash(state);
|
|
value_any.downcast_ref::<u16>().expect(CHECKED).hash(state);
|
|
} else if type_id == TypeId::of::<u32>() {
|
|
TypeId::of::<u32>().hash(state);
|
|
value_any.downcast_ref::<u32>().expect(CHECKED).hash(state);
|
|
} else if type_id == TypeId::of::<u64>() {
|
|
TypeId::of::<u64>().hash(state);
|
|
value_any.downcast_ref::<u64>().expect(CHECKED).hash(state);
|
|
} else if type_id == TypeId::of::<i8>() {
|
|
TypeId::of::<i8>().hash(state);
|
|
value_any.downcast_ref::<i8>().expect(CHECKED).hash(state);
|
|
} else if type_id == TypeId::of::<i16>() {
|
|
TypeId::of::<i16>().hash(state);
|
|
value_any.downcast_ref::<i16>().expect(CHECKED).hash(state);
|
|
} else if type_id == TypeId::of::<i32>() {
|
|
TypeId::of::<i32>().hash(state);
|
|
value_any.downcast_ref::<i32>().expect(CHECKED).hash(state);
|
|
} else if type_id == TypeId::of::<i64>() {
|
|
TypeId::of::<i64>().hash(state);
|
|
value_any.downcast_ref::<i64>().expect(CHECKED).hash(state);
|
|
}
|
|
|
|
#[cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))]
|
|
if type_id == TypeId::of::<u128>() {
|
|
TypeId::of::<u128>().hash(state);
|
|
value_any.downcast_ref::<u128>().expect(CHECKED).hash(state);
|
|
} else if type_id == TypeId::of::<i128>() {
|
|
TypeId::of::<i128>().hash(state);
|
|
value_any.downcast_ref::<i128>().expect(CHECKED).hash(state);
|
|
}
|
|
}
|
|
|
|
unimplemented!("a custom type cannot be hashed")
|
|
}
|
|
|
|
#[cfg(not(feature = "no_std"))]
|
|
Union::TimeStamp(_, _, _) => unimplemented!("{} cannot be hashed", self.type_name()),
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Map the name of a standard type into a friendly form.
|
|
#[inline]
|
|
#[must_use]
|
|
pub(crate) fn map_std_type_name(name: &str) -> &str {
|
|
if name == type_name::<String>() {
|
|
return "string";
|
|
}
|
|
if name == type_name::<ImmutableString>() {
|
|
return "string";
|
|
}
|
|
if name == type_name::<&str>() {
|
|
return "string";
|
|
}
|
|
if name == type_name::<FnPtr>() {
|
|
return "Fn";
|
|
}
|
|
#[cfg(feature = "decimal")]
|
|
if name == type_name::<Decimal>() {
|
|
return "decimal";
|
|
}
|
|
#[cfg(not(feature = "no_index"))]
|
|
if name == type_name::<Array>() {
|
|
return "array";
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
if name == type_name::<Map>() {
|
|
return "map";
|
|
}
|
|
#[cfg(not(feature = "no_std"))]
|
|
if name == type_name::<Instant>() {
|
|
return "timestamp";
|
|
}
|
|
|
|
name
|
|
}
|
|
|
|
impl fmt::Display for Dynamic {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
match self.0 {
|
|
Union::Unit(_, _, _) => write!(f, ""),
|
|
Union::Bool(ref value, _, _) => fmt::Display::fmt(value, f),
|
|
Union::Str(ref value, _, _) => fmt::Display::fmt(value, f),
|
|
Union::Char(ref value, _, _) => fmt::Display::fmt(value, f),
|
|
Union::Int(ref value, _, _) => fmt::Display::fmt(value, f),
|
|
#[cfg(not(feature = "no_float"))]
|
|
Union::Float(ref value, _, _) => fmt::Display::fmt(value, f),
|
|
#[cfg(feature = "decimal")]
|
|
Union::Decimal(ref value, _, _) => fmt::Display::fmt(value, f),
|
|
#[cfg(not(feature = "no_index"))]
|
|
Union::Array(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
#[cfg(not(feature = "no_object"))]
|
|
Union::Map(ref value, _, _) => {
|
|
f.write_str("#")?;
|
|
fmt::Debug::fmt(value, f)
|
|
}
|
|
Union::FnPtr(ref value, _, _) => fmt::Display::fmt(value, f),
|
|
#[cfg(not(feature = "no_std"))]
|
|
Union::TimeStamp(_, _, _) => f.write_str("<timestamp>"),
|
|
|
|
Union::Variant(ref value, _, _) => {
|
|
let _value_any = (***value).as_any();
|
|
let _type_id = _value_any.type_id();
|
|
|
|
#[cfg(not(feature = "only_i32"))]
|
|
#[cfg(not(feature = "only_i64"))]
|
|
if _type_id == TypeId::of::<u8>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<u8>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<u16>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<u16>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<u32>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<u32>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<u64>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<u64>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i8>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<i8>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i16>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<i16>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i32>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<i32>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i64>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<i64>().expect(CHECKED), f);
|
|
}
|
|
|
|
#[cfg(not(feature = "no_float"))]
|
|
if _type_id == TypeId::of::<f32>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<f32>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<f64>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<f64>().expect(CHECKED), f);
|
|
}
|
|
|
|
#[cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))]
|
|
if _type_id == TypeId::of::<u128>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<u128>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i128>() {
|
|
return fmt::Display::fmt(_value_any.downcast_ref::<i128>().expect(CHECKED), f);
|
|
}
|
|
|
|
f.write_str((***value).type_name())
|
|
}
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(not(feature = "sync"))]
|
|
Union::Shared(ref cell, _, _) => {
|
|
if let Ok(v) = cell.try_borrow() {
|
|
fmt::Display::fmt(&*v, f)
|
|
} else {
|
|
f.write_str("<shared>")
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(feature = "sync")]
|
|
Union::Shared(ref cell, _, _) => fmt::Display::fmt(&*cell.read().unwrap(), f),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for Dynamic {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
match self.0 {
|
|
Union::Unit(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
Union::Bool(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
Union::Str(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
Union::Char(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
Union::Int(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
#[cfg(not(feature = "no_float"))]
|
|
Union::Float(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
#[cfg(feature = "decimal")]
|
|
Union::Decimal(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
#[cfg(not(feature = "no_index"))]
|
|
Union::Array(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
#[cfg(not(feature = "no_object"))]
|
|
Union::Map(ref value, _, _) => {
|
|
f.write_str("#")?;
|
|
fmt::Debug::fmt(value, f)
|
|
}
|
|
Union::FnPtr(ref value, _, _) => fmt::Debug::fmt(value, f),
|
|
#[cfg(not(feature = "no_std"))]
|
|
Union::TimeStamp(_, _, _) => write!(f, "<timestamp>"),
|
|
|
|
Union::Variant(ref value, _, _) => {
|
|
let _value_any = (***value).as_any();
|
|
let _type_id = _value_any.type_id();
|
|
|
|
#[cfg(not(feature = "only_i32"))]
|
|
#[cfg(not(feature = "only_i64"))]
|
|
if _type_id == TypeId::of::<u8>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<u8>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<u16>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<u16>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<u32>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<u32>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<u64>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<u64>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i8>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<i8>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i16>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<i16>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i32>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<i32>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i64>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<i64>().expect(CHECKED), f);
|
|
}
|
|
|
|
#[cfg(not(feature = "no_float"))]
|
|
if _type_id == TypeId::of::<f32>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<f32>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<f64>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<f64>().expect(CHECKED), f);
|
|
}
|
|
|
|
#[cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))]
|
|
if _type_id == TypeId::of::<u128>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<u128>().expect(CHECKED), f);
|
|
} else if _type_id == TypeId::of::<i128>() {
|
|
return fmt::Debug::fmt(_value_any.downcast_ref::<i128>().expect(CHECKED), f);
|
|
}
|
|
|
|
f.write_str((***value).type_name())
|
|
}
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(not(feature = "sync"))]
|
|
Union::Shared(ref cell, _, _) => {
|
|
if let Ok(v) = cell.try_borrow() {
|
|
write!(f, "{:?} (shared)", *v)
|
|
} else {
|
|
f.write_str("<shared>")
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(feature = "sync")]
|
|
Union::Shared(ref cell, _, _) => fmt::Debug::fmt(&*cell.read().unwrap(), f),
|
|
}
|
|
}
|
|
}
|
|
|
|
use AccessMode::*;
|
|
|
|
impl Clone for Dynamic {
|
|
/// Clone the [`Dynamic`] value.
|
|
///
|
|
/// # WARNING
|
|
///
|
|
/// The cloned copy is marked read-write even if the original is read-only.
|
|
fn clone(&self) -> Self {
|
|
match self.0 {
|
|
Union::Unit(value, tag, _) => Self(Union::Unit(value, tag, ReadWrite)),
|
|
Union::Bool(value, tag, _) => Self(Union::Bool(value, tag, ReadWrite)),
|
|
Union::Str(ref value, tag, _) => Self(Union::Str(value.clone(), tag, ReadWrite)),
|
|
Union::Char(value, tag, _) => Self(Union::Char(value, tag, ReadWrite)),
|
|
Union::Int(value, tag, _) => Self(Union::Int(value, tag, ReadWrite)),
|
|
#[cfg(not(feature = "no_float"))]
|
|
Union::Float(value, tag, _) => Self(Union::Float(value, tag, ReadWrite)),
|
|
#[cfg(feature = "decimal")]
|
|
Union::Decimal(ref value, tag, _) => {
|
|
Self(Union::Decimal(value.clone(), tag, ReadWrite))
|
|
}
|
|
#[cfg(not(feature = "no_index"))]
|
|
Union::Array(ref value, tag, _) => Self(Union::Array(value.clone(), tag, ReadWrite)),
|
|
#[cfg(not(feature = "no_object"))]
|
|
Union::Map(ref value, tag, _) => Self(Union::Map(value.clone(), tag, ReadWrite)),
|
|
Union::FnPtr(ref value, tag, _) => Self(Union::FnPtr(value.clone(), tag, ReadWrite)),
|
|
#[cfg(not(feature = "no_std"))]
|
|
Union::TimeStamp(ref value, tag, _) => {
|
|
Self(Union::TimeStamp(value.clone(), tag, ReadWrite))
|
|
}
|
|
|
|
Union::Variant(ref value, tag, _) => {
|
|
let mut x = value.as_ref().as_ref().clone_into_dynamic();
|
|
x.set_tag(tag);
|
|
x
|
|
}
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(ref cell, tag, _) => Self(Union::Shared(cell.clone(), tag, ReadWrite)),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Default for Dynamic {
|
|
#[inline(always)]
|
|
#[must_use]
|
|
fn default() -> Self {
|
|
Self::UNIT
|
|
}
|
|
}
|
|
|
|
impl Dynamic {
|
|
/// A [`Dynamic`] containing a `()`.
|
|
pub const UNIT: Dynamic = Self(Union::Unit((), DEFAULT_TAG_VALUE, ReadWrite));
|
|
/// A [`Dynamic`] containing a `true`.
|
|
pub const TRUE: Dynamic = Self(Union::Bool(true, DEFAULT_TAG_VALUE, ReadWrite));
|
|
/// A [`Dynamic`] containing a [`false`].
|
|
pub const FALSE: Dynamic = Self(Union::Bool(false, DEFAULT_TAG_VALUE, ReadWrite));
|
|
/// A [`Dynamic`] containing the integer zero.
|
|
pub const ZERO: Dynamic = Self(Union::Int(0, DEFAULT_TAG_VALUE, ReadWrite));
|
|
/// A [`Dynamic`] containing the integer one.
|
|
pub const ONE: Dynamic = Self(Union::Int(1, DEFAULT_TAG_VALUE, ReadWrite));
|
|
/// A [`Dynamic`] containing the integer two.
|
|
pub const TWO: Dynamic = Self(Union::Int(2, DEFAULT_TAG_VALUE, ReadWrite));
|
|
/// A [`Dynamic`] containing the integer ten.
|
|
pub const TEN: Dynamic = Self(Union::Int(10, DEFAULT_TAG_VALUE, ReadWrite));
|
|
/// A [`Dynamic`] containing the integer negative one.
|
|
pub const NEGATIVE_ONE: Dynamic = Self(Union::Int(-1, DEFAULT_TAG_VALUE, ReadWrite));
|
|
/// A [`Dynamic`] containing `0.0`.
|
|
///
|
|
/// Not available under `no_float`.
|
|
#[cfg(not(feature = "no_float"))]
|
|
pub const FLOAT_ZERO: Dynamic = Self(Union::Float(
|
|
FloatWrapper::new_const(0.0),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
));
|
|
/// A [`Dynamic`] containing `1.0`.
|
|
///
|
|
/// Not available under `no_float`.
|
|
#[cfg(not(feature = "no_float"))]
|
|
pub const FLOAT_ONE: Dynamic = Self(Union::Float(
|
|
FloatWrapper::new_const(1.0),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
));
|
|
/// A [`Dynamic`] containing `2.0`.
|
|
///
|
|
/// Not available under `no_float`.
|
|
#[cfg(not(feature = "no_float"))]
|
|
pub const FLOAT_TWO: Dynamic = Self(Union::Float(
|
|
FloatWrapper::new_const(2.0),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
));
|
|
/// A [`Dynamic`] containing `10.0`.
|
|
///
|
|
/// Not available under `no_float`.
|
|
#[cfg(not(feature = "no_float"))]
|
|
pub const FLOAT_TEN: Dynamic = Self(Union::Float(
|
|
FloatWrapper::new_const(10.0),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
));
|
|
/// A [`Dynamic`] containing the `-1.0`.
|
|
///
|
|
/// Not available under `no_float`.
|
|
#[cfg(not(feature = "no_float"))]
|
|
pub const FLOAT_NEGATIVE_ONE: Dynamic = Self(Union::Float(
|
|
FloatWrapper::new_const(-1.0),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
));
|
|
|
|
/// Get the [`AccessMode`] for this [`Dynamic`].
|
|
#[must_use]
|
|
pub(crate) const fn access_mode(&self) -> AccessMode {
|
|
match self.0 {
|
|
Union::Unit(_, _, access)
|
|
| Union::Bool(_, _, access)
|
|
| Union::Str(_, _, access)
|
|
| Union::Char(_, _, access)
|
|
| Union::Int(_, _, access)
|
|
| Union::FnPtr(_, _, access)
|
|
| Union::Variant(_, _, access) => access,
|
|
|
|
#[cfg(not(feature = "no_float"))]
|
|
Union::Float(_, _, access) => access,
|
|
#[cfg(feature = "decimal")]
|
|
Union::Decimal(_, _, access) => access,
|
|
#[cfg(not(feature = "no_index"))]
|
|
Union::Array(_, _, access) => access,
|
|
#[cfg(not(feature = "no_object"))]
|
|
Union::Map(_, _, access) => access,
|
|
#[cfg(not(feature = "no_std"))]
|
|
Union::TimeStamp(_, _, access) => access,
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, access) => access,
|
|
}
|
|
}
|
|
/// Set the [`AccessMode`] for this [`Dynamic`].
|
|
pub(crate) fn set_access_mode(&mut self, typ: AccessMode) -> &mut Self {
|
|
match self.0 {
|
|
Union::Unit(_, _, ref mut access)
|
|
| Union::Bool(_, _, ref mut access)
|
|
| Union::Str(_, _, ref mut access)
|
|
| Union::Char(_, _, ref mut access)
|
|
| Union::Int(_, _, ref mut access)
|
|
| Union::FnPtr(_, _, ref mut access)
|
|
| Union::Variant(_, _, ref mut access) => *access = typ,
|
|
|
|
#[cfg(not(feature = "no_float"))]
|
|
Union::Float(_, _, ref mut access) => *access = typ,
|
|
#[cfg(feature = "decimal")]
|
|
Union::Decimal(_, _, ref mut access) => *access = typ,
|
|
#[cfg(not(feature = "no_index"))]
|
|
Union::Array(ref mut a, _, ref mut access) => {
|
|
*access = typ;
|
|
a.iter_mut().for_each(|v| {
|
|
v.set_access_mode(typ);
|
|
});
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
Union::Map(ref mut m, _, ref mut access) => {
|
|
*access = typ;
|
|
m.values_mut().for_each(|v| {
|
|
v.set_access_mode(typ);
|
|
});
|
|
}
|
|
#[cfg(not(feature = "no_std"))]
|
|
Union::TimeStamp(_, _, ref mut access) => *access = typ,
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, ref mut access) => *access = typ,
|
|
}
|
|
self
|
|
}
|
|
/// Is this [`Dynamic`] read-only?
|
|
///
|
|
/// Constant [`Dynamic`] values are read-only. If a [`&mut Dynamic`][Dynamic] to such a constant
|
|
/// is passed to a Rust function, the function can use this information to return an error of
|
|
/// [`ErrorAssignmentToConstant`][crate::EvalAltResult::ErrorAssignmentToConstant]
|
|
/// if its value is going to be modified. This safe-guards constant values from being modified
|
|
/// from within Rust functions.
|
|
#[must_use]
|
|
pub fn is_read_only(&self) -> bool {
|
|
#[cfg(not(feature = "no_closure"))]
|
|
match self.0 {
|
|
Union::Shared(_, _, ReadOnly) => return true,
|
|
|
|
#[cfg(not(feature = "sync"))]
|
|
Union::Shared(ref cell, _, _) => {
|
|
return match cell.borrow().access_mode() {
|
|
ReadWrite => false,
|
|
ReadOnly => true,
|
|
}
|
|
}
|
|
#[cfg(feature = "sync")]
|
|
Union::Shared(ref cell, _, _) => {
|
|
return match cell.read().unwrap().access_mode() {
|
|
ReadWrite => false,
|
|
ReadOnly => true,
|
|
}
|
|
}
|
|
|
|
_ => (),
|
|
}
|
|
|
|
match self.access_mode() {
|
|
ReadWrite => false,
|
|
ReadOnly => true,
|
|
}
|
|
}
|
|
/// Can this [`Dynamic`] be hashed?
|
|
#[must_use]
|
|
pub(crate) fn is_hashable(&self) -> bool {
|
|
match self.0 {
|
|
Union::Unit(_, _, _)
|
|
| Union::Bool(_, _, _)
|
|
| Union::Str(_, _, _)
|
|
| Union::Char(_, _, _)
|
|
| Union::Int(_, _, _) => true,
|
|
|
|
#[cfg(not(feature = "no_float"))]
|
|
Union::Float(_, _, _) => true,
|
|
#[cfg(not(feature = "no_index"))]
|
|
Union::Array(_, _, _) => true,
|
|
#[cfg(not(feature = "no_object"))]
|
|
Union::Map(_, _, _) => true,
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(not(feature = "sync"))]
|
|
Union::Shared(ref cell, _, _) => cell.borrow().is_hashable(),
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(feature = "sync")]
|
|
Union::Shared(ref cell, _, _) => cell.read().unwrap().is_hashable(),
|
|
|
|
_ => false,
|
|
}
|
|
}
|
|
/// Create a [`Dynamic`] from any type. A [`Dynamic`] value is simply returned as is.
|
|
///
|
|
/// # Safety
|
|
///
|
|
/// This type uses some unsafe code, mainly for type casting.
|
|
///
|
|
/// # Notes
|
|
///
|
|
/// Beware that you need to pass in an [`Array`] type for it to be recognized as an [`Array`].
|
|
/// A [`Vec<T>`][Vec] does not get automatically converted to an [`Array`], but will be a generic
|
|
/// restricted trait object instead, because [`Vec<T>`][Vec] is not a supported standard type.
|
|
///
|
|
/// Similarly, passing in a [`HashMap<String, T>`][std::collections::HashMap] or
|
|
/// [`BTreeMap<String, T>`][std::collections::BTreeMap] will not get a [`Map`] but a trait object.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```
|
|
/// use rhai::Dynamic;
|
|
///
|
|
/// let result = Dynamic::from(42_i64);
|
|
/// assert_eq!(result.type_name(), "i64");
|
|
/// assert_eq!(result.to_string(), "42");
|
|
///
|
|
/// let result = Dynamic::from("hello");
|
|
/// assert_eq!(result.type_name(), "string");
|
|
/// assert_eq!(result.to_string(), "hello");
|
|
///
|
|
/// let new_result = Dynamic::from(result);
|
|
/// assert_eq!(new_result.type_name(), "string");
|
|
/// assert_eq!(new_result.to_string(), "hello");
|
|
/// ```
|
|
#[inline]
|
|
#[must_use]
|
|
pub fn from<T: Variant + Clone>(mut value: T) -> Self {
|
|
// Coded this way in order to maximally leverage potentials for dead-code removal.
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<Dynamic>() {
|
|
return unsafe_try_cast::<_, Dynamic>(value).ok().expect(CHECKED);
|
|
}
|
|
|
|
let val = value.as_any();
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<INT>() {
|
|
return (*val.downcast_ref::<INT>().expect(CHECKED)).into();
|
|
}
|
|
#[cfg(not(feature = "no_float"))]
|
|
if TypeId::of::<T>() == TypeId::of::<FLOAT>() {
|
|
return (*val.downcast_ref::<FLOAT>().expect(CHECKED)).into();
|
|
}
|
|
#[cfg(feature = "decimal")]
|
|
if TypeId::of::<T>() == TypeId::of::<Decimal>() {
|
|
return (*val.downcast_ref::<Decimal>().expect(CHECKED)).into();
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<bool>() {
|
|
return (*val.downcast_ref::<bool>().expect(CHECKED)).into();
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<char>() {
|
|
return (*val.downcast_ref::<char>().expect(CHECKED)).into();
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<ImmutableString>() {
|
|
return val
|
|
.downcast_ref::<ImmutableString>()
|
|
.expect(CHECKED)
|
|
.clone()
|
|
.into();
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<&str>() {
|
|
return val.downcast_ref::<&str>().expect(CHECKED).deref().into();
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<()>() {
|
|
return ().into();
|
|
}
|
|
|
|
value = match unsafe_try_cast::<_, String>(value) {
|
|
Ok(s) => return s.into(),
|
|
Err(value) => value,
|
|
};
|
|
#[cfg(not(feature = "no_index"))]
|
|
{
|
|
value = match unsafe_try_cast::<_, Array>(value) {
|
|
Ok(array) => return array.into(),
|
|
Err(value) => value,
|
|
};
|
|
}
|
|
|
|
#[cfg(not(feature = "no_object"))]
|
|
{
|
|
value = match unsafe_try_cast::<_, Map>(value) {
|
|
Ok(map) => return map.into(),
|
|
Err(value) => value,
|
|
};
|
|
}
|
|
|
|
value = match unsafe_try_cast::<_, FnPtr>(value) {
|
|
Ok(fn_ptr) => return fn_ptr.into(),
|
|
Err(value) => value,
|
|
};
|
|
|
|
#[cfg(not(feature = "no_std"))]
|
|
{
|
|
value = match unsafe_try_cast::<_, Instant>(value) {
|
|
Ok(timestamp) => return timestamp.into(),
|
|
Err(value) => value,
|
|
};
|
|
}
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
{
|
|
value = match unsafe_try_cast::<_, crate::Shared<crate::Locked<Dynamic>>>(value) {
|
|
Ok(value) => return value.into(),
|
|
Err(value) => value,
|
|
};
|
|
}
|
|
|
|
Self(Union::Variant(
|
|
Box::new(Box::new(value)),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
))
|
|
}
|
|
/// Turn the [`Dynamic`] value into a shared [`Dynamic`] value backed by an
|
|
/// [`Rc`][std::rc::Rc]`<`[`RefCell`][std::cell::RefCell]`<`[`Dynamic`]`>>` or
|
|
/// [`Arc`][std::sync::Arc]`<`[`RwLock`][std::sync::RwLock]`<`[`Dynamic`]`>>`
|
|
/// depending on the `sync` feature.
|
|
///
|
|
/// Not available under `no_closure`.
|
|
///
|
|
/// Shared [`Dynamic`] values are relatively cheap to clone as they simply increment the
|
|
/// reference counts.
|
|
///
|
|
/// Shared [`Dynamic`] values can be converted seamlessly to and from ordinary [`Dynamic`]
|
|
/// values.
|
|
///
|
|
/// If the [`Dynamic`] value is already shared, this method returns itself.
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn into_shared(self) -> Self {
|
|
let _access = self.access_mode();
|
|
|
|
match self.0 {
|
|
Union::Shared(_, _, _) => self,
|
|
_ => Self(Union::Shared(
|
|
crate::Locked::new(self).into(),
|
|
DEFAULT_TAG_VALUE,
|
|
_access,
|
|
)),
|
|
}
|
|
}
|
|
/// Convert the [`Dynamic`] value into specific type.
|
|
///
|
|
/// Casting to a [`Dynamic`] just returns as is, but if it contains a shared value,
|
|
/// it is cloned into a [`Dynamic`] with a normal value.
|
|
///
|
|
/// Returns [`None`] if types mismatched.
|
|
///
|
|
/// # Panics or Deadlocks
|
|
///
|
|
/// Under the `sync` feature, this call may deadlock, or [panic](https://doc.rust-lang.org/std/sync/struct.RwLock.html#panics-1).
|
|
/// Otherwise, this call panics if the data is currently borrowed for write.
|
|
///
|
|
/// These normally shouldn't occur since most operations in Rhai is single-threaded.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use rhai::Dynamic;
|
|
///
|
|
/// let x = Dynamic::from(42_u32);
|
|
///
|
|
/// assert_eq!(x.try_cast::<u32>().unwrap(), 42);
|
|
/// ```
|
|
#[inline]
|
|
#[must_use]
|
|
pub fn try_cast<T: Any>(self) -> Option<T> {
|
|
// Coded this way in order to maximally leverage potentials for dead-code removal.
|
|
|
|
#[cfg(not(feature = "no_closure"))]
|
|
if let Union::Shared(_, _, _) = self.0 {
|
|
return self.flatten().try_cast::<T>();
|
|
}
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<Dynamic>() {
|
|
return unsafe_try_cast::<_, T>(self).ok();
|
|
}
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<INT>() {
|
|
return match self.0 {
|
|
Union::Int(value, _, _) => unsafe_try_cast(value).ok(),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
#[cfg(not(feature = "no_float"))]
|
|
if TypeId::of::<T>() == TypeId::of::<FLOAT>() {
|
|
return match self.0 {
|
|
Union::Float(value, _, _) => unsafe_try_cast(*value).ok(),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
#[cfg(feature = "decimal")]
|
|
if TypeId::of::<T>() == TypeId::of::<Decimal>() {
|
|
return match self.0 {
|
|
Union::Decimal(value, _, _) => unsafe_try_cast(*value).ok(),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<bool>() {
|
|
return match self.0 {
|
|
Union::Bool(value, _, _) => unsafe_try_cast(value).ok(),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<ImmutableString>() {
|
|
return match self.0 {
|
|
Union::Str(value, _, _) => unsafe_try_cast(value).ok(),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<String>() {
|
|
return match self.0 {
|
|
Union::Str(value, _, _) => unsafe_try_cast(value.into_owned()).ok(),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<char>() {
|
|
return match self.0 {
|
|
Union::Char(value, _, _) => unsafe_try_cast(value).ok(),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
#[cfg(not(feature = "no_index"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Array>() {
|
|
return match self.0 {
|
|
Union::Array(value, _, _) => unsafe_cast_box::<_, T>(value).ok().map(|v| *v),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
#[cfg(not(feature = "no_object"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Map>() {
|
|
return match self.0 {
|
|
Union::Map(value, _, _) => unsafe_cast_box::<_, T>(value).ok().map(|v| *v),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<FnPtr>() {
|
|
return match self.0 {
|
|
Union::FnPtr(value, _, _) => unsafe_cast_box::<_, T>(value).ok().map(|v| *v),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
#[cfg(not(feature = "no_std"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Instant>() {
|
|
return match self.0 {
|
|
Union::TimeStamp(value, _, _) => unsafe_cast_box::<_, T>(value).ok().map(|v| *v),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<()>() {
|
|
return match self.0 {
|
|
Union::Unit(value, _, _) => unsafe_try_cast(value).ok(),
|
|
_ => None,
|
|
};
|
|
}
|
|
|
|
match self.0 {
|
|
Union::Variant(value, _, _) => (*value).as_box_any().downcast().map(|x| *x).ok(),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => unreachable!("Union::Shared case should be already handled"),
|
|
_ => None,
|
|
}
|
|
}
|
|
/// Convert the [`Dynamic`] value into a specific type.
|
|
///
|
|
/// Casting to a [`Dynamic`] just returns as is, but if it contains a shared value,
|
|
/// it is cloned into a [`Dynamic`] with a normal value.
|
|
///
|
|
/// Returns [`None`] if types mismatched.
|
|
///
|
|
/// # Panics or Deadlocks
|
|
///
|
|
/// Panics if the cast fails (e.g. the type of the actual value is not the
|
|
/// same as the specified type).
|
|
///
|
|
/// Under the `sync` feature, this call may deadlock, or [panic](https://doc.rust-lang.org/std/sync/struct.RwLock.html#panics-1).
|
|
/// Otherwise, this call panics if the data is currently borrowed for write.
|
|
///
|
|
/// These normally shouldn't occur since most operations in Rhai is single-threaded.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use rhai::Dynamic;
|
|
///
|
|
/// let x = Dynamic::from(42_u32);
|
|
///
|
|
/// assert_eq!(x.cast::<u32>(), 42);
|
|
/// ```
|
|
#[inline]
|
|
#[must_use]
|
|
pub fn cast<T: Any + Clone>(self) -> T {
|
|
#[cfg(not(feature = "no_closure"))]
|
|
let self_type_name = if self.is_shared() {
|
|
// Avoid panics/deadlocks with shared values
|
|
"<shared>"
|
|
} else {
|
|
self.type_name()
|
|
};
|
|
#[cfg(feature = "no_closure")]
|
|
let self_type_name = self.type_name();
|
|
|
|
self.try_cast::<T>().unwrap_or_else(|| {
|
|
panic!(
|
|
"cannot cast {} value and to {}",
|
|
self_type_name,
|
|
type_name::<T>()
|
|
)
|
|
})
|
|
}
|
|
/// Clone the [`Dynamic`] value and convert it into a specific type.
|
|
///
|
|
/// Casting to a [`Dynamic`] just returns as is, but if it contains a shared value,
|
|
/// it is cloned into a [`Dynamic`] with a normal value.
|
|
///
|
|
/// Returns [`None`] if types mismatched.
|
|
///
|
|
/// # Panics or Deadlocks
|
|
///
|
|
/// Panics if the cast fails (e.g. the type of the actual value is not the
|
|
/// same as the specified type).
|
|
///
|
|
/// Under the `sync` feature, this call may deadlock, or [panic](https://doc.rust-lang.org/std/sync/struct.RwLock.html#panics-1).
|
|
/// Otherwise, this call panics if the data is currently borrowed for write.
|
|
///
|
|
/// These normally shouldn't occur since most operations in Rhai is single-threaded.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use rhai::Dynamic;
|
|
///
|
|
/// let x = Dynamic::from(42_u32);
|
|
/// let y = &x;
|
|
///
|
|
/// assert_eq!(y.clone_cast::<u32>(), 42);
|
|
/// ```
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn clone_cast<T: Any + Clone>(&self) -> T {
|
|
self.flatten_clone().cast::<T>()
|
|
}
|
|
/// Flatten the [`Dynamic`] and clone it.
|
|
///
|
|
/// If the [`Dynamic`] is not a shared value, it returns a cloned copy.
|
|
///
|
|
/// If the [`Dynamic`] is a shared value, it returns a cloned copy of the shared value.
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn flatten_clone(&self) -> Self {
|
|
match self.0 {
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(not(feature = "sync"))]
|
|
Union::Shared(ref cell, _, _) => cell.borrow().clone(),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[cfg(feature = "sync")]
|
|
Union::Shared(ref cell, _, _) => cell.read().unwrap().clone(),
|
|
_ => self.clone(),
|
|
}
|
|
}
|
|
/// Flatten the [`Dynamic`].
|
|
///
|
|
/// If the [`Dynamic`] is not a shared value, it returns itself.
|
|
///
|
|
/// If the [`Dynamic`] is a shared value, it returns the shared value if there are no
|
|
/// outstanding references, or a cloned copy.
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn flatten(self) -> Self {
|
|
match self.0 {
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(cell, _, _) => crate::fn_native::shared_try_take(cell).map_or_else(
|
|
#[cfg(not(feature = "sync"))]
|
|
|cell| cell.borrow().clone(),
|
|
#[cfg(feature = "sync")]
|
|
|cell| cell.read().unwrap().clone(),
|
|
#[cfg(not(feature = "sync"))]
|
|
|value| value.into_inner(),
|
|
#[cfg(feature = "sync")]
|
|
|value| value.into_inner().unwrap(),
|
|
),
|
|
_ => self,
|
|
}
|
|
}
|
|
/// Flatten the [`Dynamic`] in place.
|
|
///
|
|
/// If the [`Dynamic`] is not a shared value, it does nothing.
|
|
///
|
|
/// If the [`Dynamic`] is a shared value, it is set to the shared value if there are no
|
|
/// outstanding references, or a cloned copy otherwise.
|
|
#[inline(always)]
|
|
pub(crate) fn flatten_in_place(&mut self) -> &mut Self {
|
|
match self.0 {
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => match std::mem::take(self).0 {
|
|
Union::Shared(cell, _, _) => {
|
|
*self = crate::fn_native::shared_try_take(cell).map_or_else(
|
|
#[cfg(not(feature = "sync"))]
|
|
|cell| cell.borrow().clone(),
|
|
#[cfg(feature = "sync")]
|
|
|cell| cell.read().unwrap().clone(),
|
|
#[cfg(not(feature = "sync"))]
|
|
|value| value.into_inner(),
|
|
#[cfg(feature = "sync")]
|
|
|value| value.into_inner().unwrap(),
|
|
);
|
|
}
|
|
_ => unreachable!(),
|
|
},
|
|
_ => (),
|
|
}
|
|
self
|
|
}
|
|
/// Is the [`Dynamic`] a shared value that is locked?
|
|
///
|
|
/// Not available under `no_closure`.
|
|
///
|
|
/// ## Note
|
|
///
|
|
/// Under the `sync` feature, shared values use [`RwLock`][std::sync::RwLock] and they are never locked.
|
|
/// Access just waits until the [`RwLock`][std::sync::RwLock] is released.
|
|
/// So this method always returns [`false`] under [`Sync`].
|
|
#[cfg(not(feature = "no_closure"))]
|
|
#[inline(always)]
|
|
#[must_use]
|
|
pub fn is_locked(&self) -> bool {
|
|
#[cfg(not(feature = "no_closure"))]
|
|
match self.0 {
|
|
Union::Shared(ref _cell, _, _) => {
|
|
#[cfg(not(feature = "sync"))]
|
|
return _cell.try_borrow().is_err();
|
|
|
|
#[cfg(feature = "sync")]
|
|
return false;
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
false
|
|
}
|
|
/// Get a reference of a specific type to the [`Dynamic`].
|
|
/// Casting to [`Dynamic`] just returns a reference to it.
|
|
///
|
|
/// Returns [`None`] if the cast fails.
|
|
///
|
|
/// # Panics or Deadlocks When Value is Shared
|
|
///
|
|
/// Under the `sync` feature, this call may deadlock, or [panic](https://doc.rust-lang.org/std/sync/struct.RwLock.html#panics-1).
|
|
/// Otherwise, this call panics if the data is currently borrowed for write.
|
|
#[inline]
|
|
#[must_use]
|
|
pub fn read_lock<T: Any + Clone>(&self) -> Option<DynamicReadLock<T>> {
|
|
match self.0 {
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(ref cell, _, _) => {
|
|
#[cfg(not(feature = "sync"))]
|
|
let value = cell.borrow();
|
|
#[cfg(feature = "sync")]
|
|
let value = cell.read().unwrap();
|
|
|
|
if (*value).type_id() != TypeId::of::<T>()
|
|
&& TypeId::of::<Dynamic>() != TypeId::of::<T>()
|
|
{
|
|
return None;
|
|
} else {
|
|
return Some(DynamicReadLock(DynamicReadLockInner::Guard(value)));
|
|
}
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
self.downcast_ref()
|
|
.map(|r| DynamicReadLock(DynamicReadLockInner::Reference(r)))
|
|
}
|
|
/// Get a mutable reference of a specific type to the [`Dynamic`].
|
|
/// Casting to [`Dynamic`] just returns a mutable reference to it.
|
|
///
|
|
/// Returns [`None`] if the cast fails.
|
|
///
|
|
/// # Panics or Deadlocks When Value is Shared
|
|
///
|
|
/// Under the `sync` feature, this call may deadlock, or [panic](https://doc.rust-lang.org/std/sync/struct.RwLock.html#panics-1).
|
|
/// Otherwise, this call panics if the data is currently borrowed for write.
|
|
#[inline]
|
|
#[must_use]
|
|
pub fn write_lock<T: Any + Clone>(&mut self) -> Option<DynamicWriteLock<T>> {
|
|
match self.0 {
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(ref cell, _, _) => {
|
|
#[cfg(not(feature = "sync"))]
|
|
let value = cell.borrow_mut();
|
|
#[cfg(feature = "sync")]
|
|
let value = cell.write().unwrap();
|
|
|
|
if (*value).type_id() != TypeId::of::<T>()
|
|
&& TypeId::of::<Dynamic>() != TypeId::of::<T>()
|
|
{
|
|
return None;
|
|
} else {
|
|
return Some(DynamicWriteLock(DynamicWriteLockInner::Guard(value)));
|
|
}
|
|
}
|
|
_ => (),
|
|
}
|
|
|
|
self.downcast_mut()
|
|
.map(|r| DynamicWriteLock(DynamicWriteLockInner::Reference(r)))
|
|
}
|
|
/// Get a reference of a specific type to the [`Dynamic`].
|
|
/// Casting to [`Dynamic`] just returns a reference to it.
|
|
///
|
|
/// Returns [`None`] if the cast fails, or if the value is shared.
|
|
#[inline]
|
|
#[must_use]
|
|
pub(crate) fn downcast_ref<T: Any + Clone + ?Sized>(&self) -> Option<&T> {
|
|
// Coded this way in order to maximally leverage potentials for dead-code removal.
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<INT>() {
|
|
return match self.0 {
|
|
Union::Int(ref value, _, _) => value.as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(not(feature = "no_float"))]
|
|
if TypeId::of::<T>() == TypeId::of::<FLOAT>() {
|
|
return match self.0 {
|
|
Union::Float(ref value, _, _) => value.as_ref().as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(feature = "decimal")]
|
|
if TypeId::of::<T>() == TypeId::of::<Decimal>() {
|
|
return match self.0 {
|
|
Union::Decimal(ref value, _, _) => value.as_ref().as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<bool>() {
|
|
return match self.0 {
|
|
Union::Bool(ref value, _, _) => value.as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<ImmutableString>() {
|
|
return match self.0 {
|
|
Union::Str(ref value, _, _) => value.as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<char>() {
|
|
return match self.0 {
|
|
Union::Char(ref value, _, _) => value.as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(not(feature = "no_index"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Array>() {
|
|
return match self.0 {
|
|
Union::Array(ref value, _, _) => value.as_ref().as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Map>() {
|
|
return match self.0 {
|
|
Union::Map(ref value, _, _) => value.as_ref().as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<FnPtr>() {
|
|
return match self.0 {
|
|
Union::FnPtr(ref value, _, _) => value.as_ref().as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(not(feature = "no_std"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Instant>() {
|
|
return match self.0 {
|
|
Union::TimeStamp(ref value, _, _) => value.as_ref().as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<()>() {
|
|
return match self.0 {
|
|
Union::Unit(ref value, _, _) => value.as_any().downcast_ref::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<Dynamic>() {
|
|
return self.as_any().downcast_ref::<T>();
|
|
}
|
|
|
|
match self.0 {
|
|
Union::Variant(ref value, _, _) => (***value).as_any().downcast_ref::<T>(),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => None,
|
|
_ => None,
|
|
}
|
|
}
|
|
/// Get a mutable reference of a specific type to the [`Dynamic`].
|
|
/// Casting to [`Dynamic`] just returns a mutable reference to it.
|
|
///
|
|
/// Returns [`None`] if the cast fails, or if the value is shared.
|
|
#[inline]
|
|
#[must_use]
|
|
pub(crate) fn downcast_mut<T: Any + Clone>(&mut self) -> Option<&mut T> {
|
|
// Coded this way in order to maximally leverage potentials for dead-code removal.
|
|
|
|
if TypeId::of::<T>() == TypeId::of::<INT>() {
|
|
return match self.0 {
|
|
Union::Int(ref mut value, _, _) => value.as_mut_any().downcast_mut::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(not(feature = "no_float"))]
|
|
if TypeId::of::<T>() == TypeId::of::<FLOAT>() {
|
|
return match self.0 {
|
|
Union::Float(ref mut value, _, _) => {
|
|
value.as_mut().as_mut_any().downcast_mut::<T>()
|
|
}
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(feature = "decimal")]
|
|
if TypeId::of::<T>() == TypeId::of::<Decimal>() {
|
|
return match self.0 {
|
|
Union::Decimal(ref mut value, _, _) => {
|
|
value.as_mut().as_mut_any().downcast_mut::<T>()
|
|
}
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<bool>() {
|
|
return match self.0 {
|
|
Union::Bool(ref mut value, _, _) => value.as_mut_any().downcast_mut::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<ImmutableString>() {
|
|
return match self.0 {
|
|
Union::Str(ref mut value, _, _) => value.as_mut_any().downcast_mut::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<char>() {
|
|
return match self.0 {
|
|
Union::Char(ref mut value, _, _) => value.as_mut_any().downcast_mut::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(not(feature = "no_index"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Array>() {
|
|
return match self.0 {
|
|
Union::Array(ref mut value, _, _) => {
|
|
value.as_mut().as_mut_any().downcast_mut::<T>()
|
|
}
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Map>() {
|
|
return match self.0 {
|
|
Union::Map(ref mut value, _, _) => value.as_mut().as_mut_any().downcast_mut::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<FnPtr>() {
|
|
return match self.0 {
|
|
Union::FnPtr(ref mut value, _, _) => {
|
|
value.as_mut().as_mut_any().downcast_mut::<T>()
|
|
}
|
|
_ => None,
|
|
};
|
|
}
|
|
#[cfg(not(feature = "no_std"))]
|
|
if TypeId::of::<T>() == TypeId::of::<Instant>() {
|
|
return match self.0 {
|
|
Union::TimeStamp(ref mut value, _, _) => {
|
|
value.as_mut().as_mut_any().downcast_mut::<T>()
|
|
}
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<()>() {
|
|
return match self.0 {
|
|
Union::Unit(ref mut value, _, _) => value.as_mut_any().downcast_mut::<T>(),
|
|
_ => None,
|
|
};
|
|
}
|
|
if TypeId::of::<T>() == TypeId::of::<Dynamic>() {
|
|
return self.as_mut_any().downcast_mut::<T>();
|
|
}
|
|
|
|
match self.0 {
|
|
Union::Variant(ref mut value, _, _) => (***value).as_mut_any().downcast_mut::<T>(),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => None,
|
|
_ => None,
|
|
}
|
|
}
|
|
/// Cast the [`Dynamic`] as a unit `()` and return it.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
#[inline]
|
|
pub fn as_unit(&self) -> Result<(), &'static str> {
|
|
match self.0 {
|
|
Union::Unit(value, _, _) => Ok(value),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => self.read_lock().map(|v| *v).ok_or_else(|| self.type_name()),
|
|
_ => Err(self.type_name()),
|
|
}
|
|
}
|
|
/// Cast the [`Dynamic`] as the system integer type [`INT`] and return it.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
#[inline]
|
|
pub fn as_int(&self) -> Result<INT, &'static str> {
|
|
match self.0 {
|
|
Union::Int(n, _, _) => Ok(n),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => self.read_lock().map(|v| *v).ok_or_else(|| self.type_name()),
|
|
_ => Err(self.type_name()),
|
|
}
|
|
}
|
|
/// Cast the [`Dynamic`] as the system floating-point type [`FLOAT`] and return it.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
///
|
|
/// Not available under `no_float`.
|
|
#[cfg(not(feature = "no_float"))]
|
|
#[inline]
|
|
pub fn as_float(&self) -> Result<FLOAT, &'static str> {
|
|
match self.0 {
|
|
Union::Float(n, _, _) => Ok(*n),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => self.read_lock().map(|v| *v).ok_or_else(|| self.type_name()),
|
|
_ => Err(self.type_name()),
|
|
}
|
|
}
|
|
/// _(decimal)_ Cast the [`Dynamic`] as a [`Decimal`](https://docs.rs/rust_decimal) and return it.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
///
|
|
/// Exported under the `decimal` feature only.
|
|
#[cfg(feature = "decimal")]
|
|
#[inline]
|
|
pub fn as_decimal(&self) -> Result<Decimal, &'static str> {
|
|
match self.0 {
|
|
Union::Decimal(ref n, _, _) => Ok(**n),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => self.read_lock().map(|v| *v).ok_or_else(|| self.type_name()),
|
|
_ => Err(self.type_name()),
|
|
}
|
|
}
|
|
/// Cast the [`Dynamic`] as a [`bool`] and return it.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
#[inline]
|
|
pub fn as_bool(&self) -> Result<bool, &'static str> {
|
|
match self.0 {
|
|
Union::Bool(b, _, _) => Ok(b),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => self.read_lock().map(|v| *v).ok_or_else(|| self.type_name()),
|
|
_ => Err(self.type_name()),
|
|
}
|
|
}
|
|
/// Cast the [`Dynamic`] as a [`char`] and return it.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
#[inline]
|
|
pub fn as_char(&self) -> Result<char, &'static str> {
|
|
match self.0 {
|
|
Union::Char(n, _, _) => Ok(n),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => self.read_lock().map(|v| *v).ok_or_else(|| self.type_name()),
|
|
_ => Err(self.type_name()),
|
|
}
|
|
}
|
|
/// Cast the [`Dynamic`] as an [`ImmutableString`] and return it.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// Panics if the value is shared.
|
|
#[inline]
|
|
pub(crate) fn as_str_ref(&self) -> Result<&str, &'static str> {
|
|
match self.0 {
|
|
Union::Str(ref s, _, _) => Ok(s),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(_, _, _) => panic!("as_str() cannot be called on shared values"),
|
|
_ => Err(self.type_name()),
|
|
}
|
|
}
|
|
/// Convert the [`Dynamic`] into a [`String`] and return it.
|
|
/// If there are other references to the same string, a cloned copy is returned.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
#[inline]
|
|
pub fn as_string(self) -> Result<String, &'static str> {
|
|
self.as_immutable_string().map(ImmutableString::into_owned)
|
|
}
|
|
/// Convert the [`Dynamic`] into an [`ImmutableString`] and return it.
|
|
/// Returns the name of the actual type if the cast fails.
|
|
#[inline]
|
|
pub fn as_immutable_string(self) -> Result<ImmutableString, &'static str> {
|
|
match self.0 {
|
|
Union::Str(s, _, _) => Ok(s),
|
|
#[cfg(not(feature = "no_closure"))]
|
|
Union::Shared(cell, _, _) => {
|
|
#[cfg(not(feature = "sync"))]
|
|
let value = cell.borrow();
|
|
#[cfg(feature = "sync")]
|
|
let value = cell.read().unwrap();
|
|
|
|
match value.0 {
|
|
Union::Str(ref s, _, _) => Ok(s.clone()),
|
|
_ => Err((*value).type_name()),
|
|
}
|
|
}
|
|
_ => Err(self.type_name()),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl From<()> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: ()) -> Self {
|
|
Self(Union::Unit(value, DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
impl From<bool> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: bool) -> Self {
|
|
Self(Union::Bool(value, DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
impl From<INT> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: INT) -> Self {
|
|
Self(Union::Int(value, DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_float"))]
|
|
impl From<FLOAT> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: FLOAT) -> Self {
|
|
Self(Union::Float(value.into(), DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_float"))]
|
|
impl From<FloatWrapper<FLOAT>> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: FloatWrapper<FLOAT>) -> Self {
|
|
Self(Union::Float(value, DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
#[cfg(feature = "decimal")]
|
|
impl From<Decimal> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: Decimal) -> Self {
|
|
Self(Union::Decimal(value.into(), DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
impl From<char> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: char) -> Self {
|
|
Self(Union::Char(value, DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
impl<S: Into<ImmutableString>> From<S> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: S) -> Self {
|
|
Self(Union::Str(value.into(), DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
impl From<&ImmutableString> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: &ImmutableString) -> Self {
|
|
value.clone().into()
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_index"))]
|
|
impl Dynamic {
|
|
/// Create a [`Dynamic`] from an [`Array`].
|
|
#[inline(always)]
|
|
pub(crate) fn from_array(array: Array) -> Self {
|
|
Self(Union::Array(array.into(), DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_index"))]
|
|
impl<T: Variant + Clone> From<Vec<T>> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: Vec<T>) -> Self {
|
|
Self(Union::Array(
|
|
Box::new(value.into_iter().map(Dynamic::from).collect()),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_index"))]
|
|
impl<T: Variant + Clone> From<&[T]> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: &[T]) -> Self {
|
|
Self(Union::Array(
|
|
Box::new(value.iter().cloned().map(Dynamic::from).collect()),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_index"))]
|
|
impl<T: Variant + Clone> std::iter::FromIterator<T> for Dynamic {
|
|
#[inline(always)]
|
|
fn from_iter<X: IntoIterator<Item = T>>(iter: X) -> Self {
|
|
Self(Union::Array(
|
|
Box::new(iter.into_iter().map(Dynamic::from).collect()),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
impl Dynamic {
|
|
/// Create a [`Dynamic`] from a [`Map`].
|
|
#[inline(always)]
|
|
pub(crate) fn from_map(map: Map) -> Self {
|
|
Self(Union::Map(map.into(), DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
#[cfg(not(feature = "no_std"))]
|
|
impl<K: Into<crate::Identifier>, T: Variant + Clone> From<std::collections::HashMap<K, T>>
|
|
for Dynamic
|
|
{
|
|
#[inline]
|
|
fn from(value: std::collections::HashMap<K, T>) -> Self {
|
|
Self(Union::Map(
|
|
Box::new(
|
|
value
|
|
.into_iter()
|
|
.map(|(k, v)| (k.into(), Dynamic::from(v)))
|
|
.collect(),
|
|
),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
#[cfg(not(feature = "no_std"))]
|
|
impl<K: Into<crate::Identifier>> From<std::collections::HashSet<K>> for Dynamic {
|
|
#[inline]
|
|
fn from(value: std::collections::HashSet<K>) -> Self {
|
|
Self(Union::Map(
|
|
Box::new(
|
|
value
|
|
.into_iter()
|
|
.map(|k| (k.into(), Dynamic::UNIT))
|
|
.collect(),
|
|
),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
impl<K: Into<crate::Identifier>, T: Variant + Clone> From<std::collections::BTreeMap<K, T>>
|
|
for Dynamic
|
|
{
|
|
#[inline]
|
|
fn from(value: std::collections::BTreeMap<K, T>) -> Self {
|
|
Self(Union::Map(
|
|
Box::new(
|
|
value
|
|
.into_iter()
|
|
.map(|(k, v)| (k.into(), Dynamic::from(v)))
|
|
.collect(),
|
|
),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_object"))]
|
|
impl<K: Into<crate::Identifier>> From<std::collections::BTreeSet<K>> for Dynamic {
|
|
#[inline]
|
|
fn from(value: std::collections::BTreeSet<K>) -> Self {
|
|
Self(Union::Map(
|
|
Box::new(
|
|
value
|
|
.into_iter()
|
|
.map(|k| (k.into(), Dynamic::UNIT))
|
|
.collect(),
|
|
),
|
|
DEFAULT_TAG_VALUE,
|
|
ReadWrite,
|
|
))
|
|
}
|
|
}
|
|
impl From<FnPtr> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: FnPtr) -> Self {
|
|
Self(Union::FnPtr(value.into(), DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
impl From<Box<FnPtr>> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: Box<FnPtr>) -> Self {
|
|
Self(Union::FnPtr(value, DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_std"))]
|
|
impl From<Instant> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: Instant) -> Self {
|
|
Self(Union::TimeStamp(value.into(), DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|
|
#[cfg(not(feature = "no_closure"))]
|
|
impl From<crate::Shared<crate::Locked<Dynamic>>> for Dynamic {
|
|
#[inline(always)]
|
|
fn from(value: crate::Shared<crate::Locked<Self>>) -> Self {
|
|
Self(Union::Shared(value, DEFAULT_TAG_VALUE, ReadWrite))
|
|
}
|
|
}
|