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|
// Test that signed and unsigned integer patterns work with `#[loop_match]`.
//@ run-pass
#![allow(incomplete_features)]
#![feature(loop_match)]
fn main() {
assert_eq!(integer(0), 2);
assert_eq!(integer(-1), 2);
assert_eq!(integer(2), 2);
assert_eq!(boolean(true), false);
assert_eq!(boolean(false), false);
assert_eq!(character('a'), 'b');
assert_eq!(character('b'), 'b');
assert_eq!(character('c'), 'd');
assert_eq!(character('d'), 'd');
assert_eq!(test_f32(1.0), core::f32::consts::PI);
assert_eq!(test_f32(2.5), core::f32::consts::PI);
assert_eq!(test_f32(4.0), 4.0);
assert_eq!(test_f64(1.0), core::f64::consts::PI);
assert_eq!(test_f64(2.5), core::f64::consts::PI);
assert_eq!(test_f64(4.0), 4.0);
}
fn integer(mut state: i32) -> i32 {
#[loop_match]
'a: loop {
state = 'blk: {
match state {
-1 => {
#[const_continue]
break 'blk 2;
}
0 => {
#[const_continue]
break 'blk -1;
}
2 => break 'a,
_ => unreachable!("weird value {:?}", state),
}
}
}
state
}
fn boolean(mut state: bool) -> bool {
#[loop_match]
loop {
state = 'blk: {
match state {
true => {
#[const_continue]
break 'blk false;
}
false => return state,
}
}
}
}
fn character(mut state: char) -> char {
#[loop_match]
loop {
state = 'blk: {
match state {
'a' => {
#[const_continue]
break 'blk 'b';
}
'b' => return state,
'c' => {
#[const_continue]
break 'blk 'd';
}
_ => return state,
}
}
}
}
fn test_f32(mut state: f32) -> f32 {
#[loop_match]
loop {
state = 'blk: {
match state {
1.0 => {
#[const_continue]
break 'blk 2.5;
}
2.0..3.0 => return core::f32::consts::PI,
_ => return state,
}
}
}
}
fn test_f64(mut state: f64) -> f64 {
#[loop_match]
loop {
state = 'blk: {
match state {
1.0 => {
#[const_continue]
break 'blk 2.5;
}
2.0..3.0 => return core::f64::consts::PI,
_ => return state,
}
}
}
}
|
