Method try_new

aiscript-arena/src/arena.rs:152–162

Similar to `new`, but allows for constructor that can fail.

(f: F)

    /// Similar to `new`, but allows for constructor that can fail.
    pub fn try_new<F, E>(f: F) -> Result<Arena<R>, E>
    where
        F: for<'gc> FnOnce(&'gc Mutation<'gc>) -> Result<Root<'gc, R>, E>,
    {
        unsafe {
            let context = Box::new(Context::new());
            let mc: &'static Mutation<'_> = &*(context.mutation_context() as *const _);
            let root: Root<'static, R> = f(mc)?;
            Ok(Arena { context, root })
        }
    }

    #[inline]
    pub fn map_root<R2>(