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55 lines
1.2 KiB
Rust
55 lines
1.2 KiB
Rust
// run-pass
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#![feature(core_intrinsics, repr128)]
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//~^ WARN the feature `repr128` is incomplete
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use std::intrinsics::discriminant_value;
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enum E1 {
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A,
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B,
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}
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#[repr(i8)]
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enum E2 {
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A = 7,
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B = -2,
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}
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#[repr(C)]
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enum E3 {
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A = 42,
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B = 100,
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}
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#[repr(i128)]
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enum E4 {
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A = 0x1223_3445_5667_7889,
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B = -0x1223_3445_5667_7889,
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}
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fn main() {
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let mut target: [isize; 3] = [0, 0, 0];
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target[1] = discriminant_value(&E1::A);
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assert_eq!(target, [0, 0, 0]);
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target[1] = discriminant_value(&E1::B);
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assert_eq!(target, [0, 1, 0]);
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let mut target: [i8; 3] = [0, 0, 0];
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target[1] = discriminant_value(&E2::A);
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assert_eq!(target, [0, 7, 0]);
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target[1] = discriminant_value(&E2::B);
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assert_eq!(target, [0, -2, 0]);
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let mut target: [isize; 3] = [0, 0, 0];
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target[1] = discriminant_value(&E3::A);
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assert_eq!(target, [0, 42, 0]);
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target[1] = discriminant_value(&E3::B);
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assert_eq!(target, [0, 100, 0]);
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let mut target: [i128; 3] = [0, 0, 0];
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target[1] = discriminant_value(&E4::A);
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assert_eq!(target, [0, 0x1223_3445_5667_7889, 0]);
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target[1] = discriminant_value(&E4::B);
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assert_eq!(target, [0, -0x1223_3445_5667_7889, 0]);
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}
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