third_party/serde-rs/serde/test_suite/no_std/src/main.rs

#![feature(lang_items, start)]
#![no_std]

#[start]
fn start(_argc: isize, _argv: *const *const u8) -> isize {
    0
}

#[lang = "eh_personality"]
#[no_mangle]
pub extern "C" fn rust_eh_personality() {}

#[panic_handler]
fn panic(_info: &core::panic::PanicInfo) -> ! {
    unsafe {
        libc::abort();
    }
}

//////////////////////////////////////////////////////////////////////////////

use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize)]
struct Unit;

#[derive(Serialize, Deserialize)]
struct Newtype(u8);

#[derive(Serialize, Deserialize)]
struct Tuple(u8, u8);

#[derive(Serialize, Deserialize)]
struct Struct {
    f: u8,
}

#[derive(Serialize, Deserialize)]
enum Enum {
    Unit,
    Newtype(u8),
    Tuple(u8, u8),
    Struct { f: u8 },
}