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// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use core::mem::*;
use test::Bencher;
#[test]
fn size_of_basic() {
assert_eq!(size_of::<u8>(), 1);
assert_eq!(size_of::<u16>(), 2);
assert_eq!(size_of::<u32>(), 4);
assert_eq!(size_of::<u64>(), 8);
}
#[test]
#[cfg(target_pointer_width = "32")]
fn size_of_32() {
assert_eq!(size_of::<uint>(), 4);
assert_eq!(size_of::<*const uint>(), 4);
}
#[test]
#[cfg(target_pointer_width = "64")]
fn size_of_64() {
assert_eq!(size_of::<uint>(), 8);
assert_eq!(size_of::<*const uint>(), 8);
}
#[test]
fn size_of_val_basic() {
assert_eq!(size_of_val(&1u8), 1);
assert_eq!(size_of_val(&1u16), 2);
assert_eq!(size_of_val(&1u32), 4);
assert_eq!(size_of_val(&1u64), 8);
}
#[test]
fn align_of_basic() {
assert_eq!(align_of::<u8>(), 1);
assert_eq!(align_of::<u16>(), 2);
assert_eq!(align_of::<u32>(), 4);
}
#[test]
#[cfg(target_pointer_width = "32")]
fn align_of_32() {
assert_eq!(align_of::<uint>(), 4);
assert_eq!(align_of::<*const uint>(), 4);
}
#[test]
#[cfg(target_pointer_width = "64")]
fn align_of_64() {
assert_eq!(align_of::<uint>(), 8);
assert_eq!(align_of::<*const uint>(), 8);
}
#[test]
fn align_of_val_basic() {
assert_eq!(align_of_val(&1u8), 1);
assert_eq!(align_of_val(&1u16), 2);
assert_eq!(align_of_val(&1u32), 4);
}
#[test]
fn test_swap() {
let mut x = 31337;
let mut y = 42;
swap(&mut x, &mut y);
assert_eq!(x, 42);
assert_eq!(y, 31337);
}
#[test]
fn test_replace() {
let mut x = Some("test".to_string());
let y = replace(&mut x, None);
assert!(x.is_none());
assert!(y.is_some());
}
#[test]
fn test_transmute_copy() {
assert_eq!(1, unsafe { transmute_copy(&1) });
}
#[test]
fn test_transmute() {
trait Foo { fn dummy(&self) { } }
impl Foo for int {}
let a = box 100 as Box<Foo>;
unsafe {
let x: ::core::raw::TraitObject = transmute(a);
assert!(*(x.data as *const int) == 100);
let _x: Box<Foo> = transmute(x);
}
unsafe {
assert!(vec![76u8] == transmute::<_, Vec<u8>>("L".to_string()));
}
}
// FIXME #13642 (these benchmarks should be in another place)
/// Completely miscellaneous language-construct benchmarks.
// Static/dynamic method dispatch
struct Struct {
field: int
}
trait Trait {
fn method(&self) -> int;
}
impl Trait for Struct {
fn method(&self) -> int {
self.field
}
}
#[bench]
fn trait_vtable_method_call(b: &mut Bencher) {
let s = Struct { field: 10 };
let t = &s as &Trait;
b.iter(|| {
t.method()
});
}
#[bench]
fn trait_static_method_call(b: &mut Bencher) {
let s = Struct { field: 10 };
b.iter(|| {
s.method()
});
}
// Overhead of various match forms
#[bench]
fn match_option_some(b: &mut Bencher) {
let x = Some(10);
b.iter(|| {
match x {
Some(y) => y,
None => 11
}
});
}
#[bench]
fn match_vec_pattern(b: &mut Bencher) {
let x = [1,2,3,4,5,6];
b.iter(|| {
match x {
[1,2,3,..] => 10,
_ => 11,
}
});
}
|
