[rustc.git] / src / test / ui / enum-discriminant / discriminant_value.rs

// run-pass
#![allow(stable_features)]
#![feature(arbitrary_enum_discriminant, core, core_intrinsics)]

extern crate core;
use core::intrinsics::discriminant_value;

enum CLike1 {
    A,
    B,
    C,
    D
}

enum CLike2 {
    A = 5,
    B = 2,
    C = 19,
    D
}

#[repr(i8)]
enum CLike3 {
    A = 5,
    B,
    C = -1,
    D
}

enum ADT {
    First(u32, u32),
    Second(u64)
}

enum NullablePointer {
    Something(&'static u32),
    Nothing
}

static CONST : u32 = 0xBEEF;

#[allow(dead_code)]
#[repr(isize)]
enum Mixed {
    Unit = 3,
    Tuple(u16) = 2,
    Struct {
        a: u8,
        b: u16,
    } = 1,
}

pub fn main() {
    assert_eq!(discriminant_value(&CLike1::A), 0);
    assert_eq!(discriminant_value(&CLike1::B), 1);
    assert_eq!(discriminant_value(&CLike1::C), 2);
    assert_eq!(discriminant_value(&CLike1::D), 3);

    assert_eq!(discriminant_value(&CLike2::A), 5);
    assert_eq!(discriminant_value(&CLike2::B), 2);
    assert_eq!(discriminant_value(&CLike2::C), 19);
    assert_eq!(discriminant_value(&CLike2::D), 20);

    assert_eq!(discriminant_value(&CLike3::A), 5);
    assert_eq!(discriminant_value(&CLike3::B), 6);
    assert_eq!(discriminant_value(&CLike3::C), -1_i8 as u64);
    assert_eq!(discriminant_value(&CLike3::D), 0);

    assert_eq!(discriminant_value(&ADT::First(0,0)), 0);
    assert_eq!(discriminant_value(&ADT::Second(5)), 1);

    assert_eq!(discriminant_value(&NullablePointer::Nothing), 1);
    assert_eq!(discriminant_value(&NullablePointer::Something(&CONST)), 0);

    assert_eq!(discriminant_value(&10), 0);
    assert_eq!(discriminant_value(&"test"), 0);

    assert_eq!(3, discriminant_value(&Mixed::Unit));
    assert_eq!(2, discriminant_value(&Mixed::Tuple(5)));
    assert_eq!(1, discriminant_value(&Mixed::Struct{a: 7, b: 11}));
}
Commit	Line	Data
dc9dc135	1	// run-pass
0bf4aa26	2	#![allow(stable_features)]
dc9dc135	3	#![feature(arbitrary_enum_discriminant, core, core_intrinsics)]
9346a6ac AL	4
	5	extern crate core;
	6	use core::intrinsics::discriminant_value;
	7
	8	enum CLike1 {
	9	A,
	10	B,
	11	C,
	12	D
	13	}
	14
	15	enum CLike2 {
	16	A = 5,
	17	B = 2,
	18	C = 19,
	19	D
	20	}
	21
	22	#[repr(i8)]
	23	enum CLike3 {
	24	A = 5,
	25	B,
	26	C = -1,
	27	D
	28	}
	29
	30	enum ADT {
	31	First(u32, u32),
	32	Second(u64)
	33	}
	34
	35	enum NullablePointer {
	36	Something(&'static u32),
	37	Nothing
	38	}
	39
	40	static CONST : u32 = 0xBEEF;
	41
dc9dc135 XL	42	#[allow(dead_code)]
	43	#[repr(isize)]
	44	enum Mixed {
	45	Unit = 3,
	46	Tuple(u16) = 2,
	47	Struct {
	48	a: u8,
	49	b: u16,
	50	} = 1,
	51	}
	52
9346a6ac	53	pub fn main() {
60c5eb7d XL	54	assert_eq!(discriminant_value(&CLike1::A), 0);
	55	assert_eq!(discriminant_value(&CLike1::B), 1);
	56	assert_eq!(discriminant_value(&CLike1::C), 2);
	57	assert_eq!(discriminant_value(&CLike1::D), 3);
9346a6ac	58
60c5eb7d XL	59	assert_eq!(discriminant_value(&CLike2::A), 5);
	60	assert_eq!(discriminant_value(&CLike2::B), 2);
	61	assert_eq!(discriminant_value(&CLike2::C), 19);
	62	assert_eq!(discriminant_value(&CLike2::D), 20);
9346a6ac	63
60c5eb7d XL	64	assert_eq!(discriminant_value(&CLike3::A), 5);
	65	assert_eq!(discriminant_value(&CLike3::B), 6);
	66	assert_eq!(discriminant_value(&CLike3::C), -1_i8 as u64);
	67	assert_eq!(discriminant_value(&CLike3::D), 0);
9346a6ac	68
60c5eb7d XL	69	assert_eq!(discriminant_value(&ADT::First(0,0)), 0);
60c5eb7d XL	70	assert_eq!(discriminant_value(&ADT::Second(5)), 1);
9346a6ac	71
60c5eb7d XL	72	assert_eq!(discriminant_value(&NullablePointer::Nothing), 1);
60c5eb7d XL	73	assert_eq!(discriminant_value(&NullablePointer::Something(&CONST)), 0);
9346a6ac	74
60c5eb7d XL	75	assert_eq!(discriminant_value(&10), 0);
60c5eb7d XL	76	assert_eq!(discriminant_value(&"test"), 0);
9346a6ac	77
60c5eb7d XL	78	assert_eq!(3, discriminant_value(&Mixed::Unit));
	79	assert_eq!(2, discriminant_value(&Mixed::Tuple(5)));
	80	assert_eq!(1, discriminant_value(&Mixed::Struct{a: 7, b: 11}));
9346a6ac	81	}