mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 17:24:06 +00:00
93 lines
2.4 KiB
Rust
93 lines
2.4 KiB
Rust
// compile-flags: -Zmir-opt-level=0
|
|
// known-bug: #110395
|
|
// FIXME run-pass
|
|
|
|
#![feature(const_float_bits_conv)]
|
|
#![feature(const_float_classify)]
|
|
#![feature(const_trait_impl)]
|
|
|
|
// Don't promote
|
|
const fn nop<T>(x: T) -> T { x }
|
|
|
|
// FIXME(const-hack): replace with PartialEq
|
|
#[const_trait]
|
|
trait MyEq<T> {
|
|
fn eq(self, b: T) -> bool;
|
|
}
|
|
|
|
impl const MyEq<bool> for bool {
|
|
fn eq(self, b: bool) -> bool {
|
|
self == b
|
|
}
|
|
}
|
|
|
|
impl const MyEq<NonDet> for bool {
|
|
fn eq(self, _: NonDet) -> bool {
|
|
true
|
|
}
|
|
}
|
|
|
|
const fn eq<A: ~const MyEq<B>, B>(x: A, y: B) -> bool {
|
|
x.eq(y)
|
|
}
|
|
|
|
macro_rules! const_assert {
|
|
($a:expr, $b:expr) => {
|
|
{
|
|
const _: () = assert!(eq($a, $b));
|
|
assert!(eq(nop($a), nop($b)));
|
|
}
|
|
};
|
|
}
|
|
|
|
macro_rules! suite {
|
|
( $( $tt:tt )* ) => {
|
|
fn f32() {
|
|
suite_inner!(f32 $($tt)*);
|
|
}
|
|
|
|
fn f64() {
|
|
suite_inner!(f64 $($tt)*);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
macro_rules! suite_inner {
|
|
(
|
|
$ty:ident [$( $fn:ident ),*]
|
|
$val:expr => [$($out:ident),*]
|
|
|
|
$( $tail:tt )*
|
|
) => {
|
|
$( const_assert!($ty::$fn($val), $out); )*
|
|
suite_inner!($ty [$($fn),*] $($tail)*)
|
|
};
|
|
|
|
( $ty:ident [$( $fn:ident ),*]) => {};
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
struct NonDet;
|
|
|
|
// The result of the `is_sign` methods are not checked for correctness, since LLVM does not
|
|
// guarantee anything about the signedness of NaNs. See
|
|
// https://github.com/rust-lang/rust/issues/55131.
|
|
|
|
suite! {
|
|
[is_nan, is_infinite, is_finite, is_normal, is_sign_positive, is_sign_negative]
|
|
-0.0 / 0.0 => [ true, false, false, false, NonDet, NonDet]
|
|
0.0 / 0.0 => [ true, false, false, false, NonDet, NonDet]
|
|
1.0 => [ false, false, true, true, true, false]
|
|
-1.0 => [ false, false, true, true, false, true]
|
|
0.0 => [ false, false, true, false, true, false]
|
|
-0.0 => [ false, false, true, false, false, true]
|
|
1.0 / 0.0 => [ false, true, false, false, true, false]
|
|
-1.0 / 0.0 => [ false, true, false, false, false, true]
|
|
}
|
|
|
|
fn main() {
|
|
f32();
|
|
f64();
|
|
}
|