mirror of https://github.com/rust-lang/rust.git
65 lines
2.0 KiB
Rust
65 lines
2.0 KiB
Rust
#![feature(core_intrinsics)]
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use std::io::Write;
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use std::intrinsics;
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fn main() {
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let _ = ::std::iter::repeat('a' as u8).take(10).collect::<Vec<_>>();
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let stderr = ::std::io::stderr();
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let mut stderr = stderr.lock();
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writeln!(stderr, "some {} text", "<unknown>").unwrap();
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let _ = std::process::Command::new("true").env("c", "d").spawn();
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println!("cargo:rustc-link-lib=z");
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static ONCE: std::sync::Once = std::sync::ONCE_INIT;
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ONCE.call_once(|| {});
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LoopState::Continue(()) == LoopState::Break(());
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// Make sure ByValPair values with differently sized components are correctly passed
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map(None::<(u8, Box<Instruction>)>);
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println!("{}", 2.3f32.exp());
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println!("{}", 2.3f32.exp2());
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println!("{}", 2.3f32.abs());
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println!("{}", 2.3f32.sqrt());
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println!("{}", 2.3f32.floor());
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println!("{}", 2.3f32.ceil());
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println!("{}", 2.3f32.min(1.0));
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println!("{}", 2.3f32.max(1.0));
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println!("{}", 2.3f32.powi(2));
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assert_eq!(0b0000000000000000000000000010000010000000000000000000000000000000_0000000000100000000000000000000000001000000000000100000000000000u128.leading_zeros(), 26);
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assert_eq!(0b0000000000000000000000000010000000000000000000000000000000000000_0000000000000000000000000000000000001000000000000000000010000000u128.trailing_zeros(), 7);
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0i128.checked_div(2i128);
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0u128.checked_div(2u128);
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assert_eq!(1u128 + 2, 3);
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assert_eq!(0b100010000000000000000000000000000u128 >> 10, 0b10001000000000000000000u128);
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assert_eq!(0xFEDCBA987654321123456789ABCDEFu128 >> 64, 0xFEDCBA98765432u128);
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assert_eq!(0xFEDCBA987654321123456789ABCDEFu128 as i128 >> 64, 0xFEDCBA98765432i128);
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assert_eq!(353985398u128 * 932490u128, 330087843781020u128);
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}
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#[derive(PartialEq)]
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enum LoopState {
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Continue(()),
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Break(())
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}
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pub enum Instruction {
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Increment,
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Loop,
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}
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fn map(a: Option<(u8, Box<Instruction>)>) -> Option<Box<Instruction>> {
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match a {
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None => None,
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Some((_, instr)) => Some(instr),
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}
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}
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