146 lines
2.4 KiB
Rust
146 lines
2.4 KiB
Rust
//@ run-pass
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// Issue 23030: Workaround overflowing discriminant
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// with explicit assignments.
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// See also ui/discrim/discrim-overflow.rs, which shows what
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// happens if you leave the OhNo explicit cases out here.
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fn f_i8() {
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#[repr(i8)]
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enum A {
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Ok = i8::MAX - 1,
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Ok2,
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OhNo = i8::MIN,
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NotTheEnd = -1,
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Zero,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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let z = (A::NotTheEnd, A::Zero).1 as i8;
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assert_eq!(z, 0);
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}
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fn f_u8() {
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#[repr(u8)]
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enum A {
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Ok = u8::MAX - 1,
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Ok2,
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OhNo = u8::MIN,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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}
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fn f_i16() {
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#[repr(i16)]
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enum A {
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Ok = i16::MAX - 1,
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Ok2,
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OhNo = i16::MIN,
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NotTheEnd = -1,
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Zero,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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let z = (A::NotTheEnd, A::Zero).1 as i16;
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assert_eq!(z, 0);
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}
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fn f_u16() {
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#[repr(u16)]
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enum A {
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Ok = u16::MAX - 1,
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Ok2,
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OhNo = u16::MIN,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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}
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fn f_i32() {
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#[repr(i32)]
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enum A {
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Ok = i32::MAX - 1,
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Ok2,
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OhNo = i32::MIN,
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NotTheEnd = -1,
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Zero,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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let z = (A::NotTheEnd, A::Zero).1 as i32;
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assert_eq!(z, 0);
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}
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fn f_u32() {
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#[repr(u32)]
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enum A {
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Ok = u32::MAX - 1,
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Ok2,
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OhNo = u32::MIN,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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}
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fn f_i64() {
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#[repr(i64)]
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enum A {
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Ok = i64::MAX - 1,
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Ok2,
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OhNo = i64::MIN,
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NotTheEnd = -1,
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Zero,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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let z = (A::NotTheEnd, A::Zero).1 as i64;
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assert_eq!(z, 0);
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}
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fn f_u64() {
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#[repr(u64)]
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enum A {
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Ok = u64::MAX - 1,
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Ok2,
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OhNo = u64::MIN,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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}
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fn f_isize() {
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#[repr(isize)]
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enum A {
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Ok = isize::MAX - 1,
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Ok2,
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OhNo = isize::MIN,
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NotTheEnd = -1,
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Zero,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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let z = (A::NotTheEnd, A::Zero).1 as isize;
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assert_eq!(z, 0);
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}
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fn f_usize() {
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#[repr(usize)]
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enum A {
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Ok = usize::MAX - 1,
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Ok2,
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OhNo = usize::MIN,
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}
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let _x = (A::Ok, A::Ok2, A::OhNo);
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}
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fn main() {
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f_i8(); f_u8();
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f_i16(); f_u16();
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f_i32(); f_u32();
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f_i64(); f_u64();
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f_isize(); f_usize();
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}
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