1 use crate::error::OutOfMemory;
2 
3 /// Helper function to invoke `<T as TryNew>::try_new`.
4 ///
5 /// # Example
6 ///
7 /// ```
8 /// # use wasmtime_internal_core::alloc::*;
9 /// # use wasmtime_internal_core::error::Result;
10 /// # fn _foo() -> Result<()> {
11 /// let boxed = try_new::<Box<u32>>(36)?;
12 /// assert_eq!(*boxed, 36);
13 /// # Ok(())
14 /// # }
15 /// ```
16 #[inline]
17 pub fn try_new<T>(value: T::Value) -> Result<T, OutOfMemory>
18 where
19     T: TryNew,
20 {
21     TryNew::try_new(value)
22 }
23 
24 /// Extension trait providing fallible allocation for types like `Arc<T>` and
25 /// `Box<T>`.
26 pub trait TryNew {
27     /// The inner `T` type that is getting wrapped into an `Arc<T>` or `Box<T>`.
28     type Value;
29 
30     /// Allocate a new `Self`, returning `Err(OutOfMemory)` on allocation
31     /// failure.
32     fn try_new(value: Self::Value) -> Result<Self, OutOfMemory>
33     where
34         Self: Sized;
35 }
36