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// Compiler:
//
// Run-time:
// stdout: 2
// 7 8
// 10
#![allow(unused_attributes)]
#![feature(auto_traits, lang_items, no_core, start, intrinsics, track_caller)]
#![no_std]
#![no_core]
/*
* Core
*/
// Because we don't have core yet.
#[lang = "sized"]
pub trait Sized {}
#[lang = "copy"]
trait Copy {
}
impl Copy for isize {}
impl Copy for *mut i32 {}
impl Copy for usize {}
impl Copy for u8 {}
impl Copy for i8 {}
impl Copy for i32 {}
#[lang = "receiver"]
trait Receiver {
}
#[lang = "freeze"]
pub(crate) unsafe auto trait Freeze {}
#[lang = "panic_location"]
struct PanicLocation {
file: &'static str,
line: u32,
column: u32,
}
mod libc {
#[link(name = "c")]
extern "C" {
pub fn puts(s: *const u8) -> i32;
pub fn fflush(stream: *mut i32) -> i32;
pub fn printf(format: *const i8, ...) -> i32;
pub static stdout: *mut i32;
}
}
mod intrinsics {
extern "rust-intrinsic" {
pub fn abort() -> !;
}
}
#[lang = "panic"]
#[track_caller]
#[no_mangle]
pub fn panic(_msg: &str) -> ! {
unsafe {
libc::puts("Panicking\0" as *const str as *const u8);
libc::fflush(libc::stdout);
intrinsics::abort();
}
}
#[lang = "add"]
trait Add<RHS = Self> {
type Output;
fn add(self, rhs: RHS) -> Self::Output;
}
impl Add for u8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i8 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for i32 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for usize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
impl Add for isize {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self + rhs
}
}
/*
* Code
*/
fn inc_ref(num: &mut isize) -> isize {
*num = *num + 5;
*num + 1
}
fn inc(num: isize) -> isize {
num + 1
}
#[start]
fn main(mut argc: isize, _argv: *const *const u8) -> isize {
argc = inc(argc);
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, argc);
}
let b = inc_ref(&mut argc);
unsafe {
libc::printf(b"%ld %ld\n\0" as *const u8 as *const i8, argc, b);
}
argc = 10;
unsafe {
libc::printf(b"%ld\n\0" as *const u8 as *const i8, argc);
}
0
}
|
