1 // SPDX-License-Identifier: Apache-2.0 OR MIT 2 3 #![cfg_attr(feature = "alloc", feature(allocator_api))] 4 5 use core::convert::Infallible; 6 7 #[cfg(feature = "alloc")] 8 use std::alloc::AllocError; 9 10 #[derive(Debug)] 11 pub struct Error; 12 13 impl From<Infallible> for Error { 14 #[inline] 15 fn from(e: Infallible) -> Self { 16 match e {} 17 } 18 } 19 20 #[cfg(feature = "alloc")] 21 impl From<AllocError> for Error { 22 #[inline] 23 fn from(_: AllocError) -> Self { 24 Self 25 } 26 } 27 28 #[allow(dead_code)] 29 fn main() { 30 let _ = Error; 31 } 32