bf765e61b5
# Objective - Contributes to #15460 ## Solution - Added `std` feature (enabled by default) ## Testing - CI - `cargo check -p bevy_reflect --no-default-features --target "x86_64-unknown-none"` - UEFI demo application runs with this branch of `bevy_reflect`, allowing `derive(Reflect)` ## Notes - The [`spin`](https://crates.io/crates/spin) crate has been included to provide `RwLock` and `Once` (as an alternative to `OnceLock`) when the `std` feature is not enabled. Another alternative may be more desirable, please provide feedback if you have a strong opinion here! - Certain items (`Box`, `String`, `ToString`) provided by `alloc` have been added to `__macro_exports` as a way to avoid `alloc` vs `std` namespacing. I'm personally quite annoyed that we can't rely on `alloc` as a crate name in `std` environments within macros. I'd love an alternative to my approach here, but I suspect it's the least-bad option. - I would've liked to have an `alloc` feature (for allocation-free `bevy_reflect`), unfortunately, `erased_serde` unconditionally requires access to `Box`. Maybe one day we could design around this, but for now it just means `bevy_reflect` requires `alloc`. --------- Co-authored-by: Gino Valente <49806985+MrGVSV@users.noreply.github.com> Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
45 lines
1.7 KiB
Rust
45 lines
1.7 KiB
Rust
use crate::func::{args::ArgError, Return};
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use alloc::borrow::Cow;
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use derive_more::derive::{Display, Error, From};
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#[cfg(not(feature = "std"))]
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use alloc::{boxed::Box, format, vec};
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/// An error that occurs when calling a [`DynamicFunction`] or [`DynamicFunctionMut`].
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///
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/// [`DynamicFunction`]: crate::func::DynamicFunction
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/// [`DynamicFunctionMut`]: crate::func::DynamicFunctionMut
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#[derive(Debug, Error, Display, PartialEq, From)]
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pub enum FunctionError {
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/// An error occurred while converting an argument.
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ArgError(ArgError),
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/// The number of arguments provided does not match the expected number.
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#[display("expected {expected} arguments but received {received}")]
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ArgCountMismatch { expected: usize, received: usize },
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}
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/// The result of calling a [`DynamicFunction`] or [`DynamicFunctionMut`].
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///
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/// Returns `Ok(value)` if the function was called successfully,
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/// where `value` is the [`Return`] value of the function.
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///
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/// [`DynamicFunction`]: crate::func::DynamicFunction
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/// [`DynamicFunctionMut`]: crate::func::DynamicFunctionMut
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pub type FunctionResult<'a> = Result<Return<'a>, FunctionError>;
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/// An error that occurs when registering a function into a [`FunctionRegistry`].
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///
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/// [`FunctionRegistry`]: crate::func::FunctionRegistry
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#[derive(Debug, Error, Display, PartialEq)]
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pub enum FunctionRegistrationError {
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/// A function with the given name has already been registered.
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///
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/// Contains the duplicate function name.
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#[display("a function has already been registered with name {_0:?}")]
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#[error(ignore)]
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DuplicateName(Cow<'static, str>),
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/// The function is missing a name by which it can be registered.
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#[display("function name is missing")]
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MissingName,
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}
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