rust/examples/example.rs
2018-08-08 10:39:10 +02:00

145 lines
2.3 KiB
Rust

#![feature(no_core, unboxed_closures)]
#![no_core]
#![allow(dead_code)]
extern crate mini_core;
use mini_core::*;
fn abc(a: u8) -> u8 {
a * 2
}
fn bcd(b: bool, a: u8) -> u8 {
if b {
a * 2
} else {
a * 3
}
}
// FIXME make calls work
fn call() {
abc(42);
}
fn indirect_call() {
let f: fn() = call;
f();
}
enum BoolOption {
Some(bool),
None,
}
fn option_unwrap_or(o: BoolOption, d: bool) -> bool {
match o {
BoolOption::Some(b) => b,
BoolOption::None => d,
}
}
fn ret_42() -> u8 {
42
}
fn return_str() -> &'static str {
"hello world"
}
fn promoted_val() -> &'static u8 {
&(1 * 2)
}
fn cast_ref_to_raw_ptr(abc: &u8) -> *const u8 {
abc as *const u8
}
fn cmp_raw_ptr(a: *const u8, b: *const u8) -> bool {
a == b
}
fn int_cast(a: u16, b: i16) -> (u8, u16, u32, usize, i8, i16, i32, isize, u8, u32) {
(
a as u8, a as u16, a as u32, a as usize, a as i8, a as i16, a as i32, a as isize, b as u8,
b as u32,
)
}
fn char_cast(c: char) -> u8 {
c as u8
}
struct DebugTuple(());
fn debug_tuple() -> DebugTuple {
DebugTuple(())
}
fn size_of<T>() -> usize {
unsafe { intrinsics::size_of::<T>() }
}
fn use_size_of() -> usize {
size_of::<u64>()
}
/*unsafe fn use_copy_intrinsic(src: *const u8, dst: *mut u8) {
intrinsics::copy::<u8>(src, dst, 1);
}*/
/*unsafe fn use_copy_intrinsic_ref(src: *const u8, dst: *mut u8) {
let copy2 = &copy::<u8>;
copy2(src, dst, 1);
}*/
const Abc: u8 = 6 * 7;
fn use_const() -> u8 {
Abc
}
fn call_closure_3arg() {
(|_, _, _| {})(0u8, 42u16, 0u8)
}
fn call_closure_2arg() {
(|_, _| {})(0u8, 42u16)
}
struct IsNotEmpty;
impl<'a, 'b> FnOnce<(&'a &'b [u16],)> for IsNotEmpty {
type Output = bool;
#[inline]
extern "rust-call" fn call_once(mut self, arg: (&'a &'b [u16],)) -> bool {
self.call_mut(arg)
}
}
impl<'a, 'b> FnMut<(&'a &'b [u16],)> for IsNotEmpty {
#[inline]
extern "rust-call" fn call_mut(&mut self, arg: (&'a &'b [u16],)) -> bool {
true
}
}
fn eq_char(a: char, b: char) -> bool {
a == b
}
unsafe fn transmute(c: char) -> u32 {
intrinsics::transmute(c)
}
unsafe fn call_uninit() -> u8 {
intrinsics::uninit()
}
// TODO: enable when fat pointers are supported
/*unsafe fn deref_str_ptr(s: *const str) -> &'static str {
&*s
}*/