mirror of https://github.com/rust-lang/rust
46 lines
1.3 KiB
Rust
46 lines
1.3 KiB
Rust
//@ run-pass
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// Test a ZST enum whose dicriminant is ~0i128. This caused an ICE when casting to an i32.
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use std::hint::black_box;
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#[derive(Copy, Clone)]
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enum Nums {
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NegOne = -1,
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}
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const NEG_ONE_I8: i8 = Nums::NegOne as i8;
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const NEG_ONE_I16: i16 = Nums::NegOne as i16;
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const NEG_ONE_I32: i32 = Nums::NegOne as i32;
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const NEG_ONE_I64: i64 = Nums::NegOne as i64;
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const NEG_ONE_I128: i128 = Nums::NegOne as i128;
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fn test_as_arg(n: Nums) {
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assert_eq!(-1i8, n as i8);
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assert_eq!(-1i16, n as i16);
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assert_eq!(-1i32, n as i32);
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assert_eq!(-1i64, n as i64);
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assert_eq!(-1i128, n as i128);
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}
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fn main() {
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let kind = Nums::NegOne;
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assert_eq!(-1i8, kind as i8);
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assert_eq!(-1i16, kind as i16);
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assert_eq!(-1i32, kind as i32);
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assert_eq!(-1i64, kind as i64);
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assert_eq!(-1i128, kind as i128);
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assert_eq!(-1i8, black_box(kind) as i8);
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assert_eq!(-1i16, black_box(kind) as i16);
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assert_eq!(-1i32, black_box(kind) as i32);
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assert_eq!(-1i64, black_box(kind) as i64);
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assert_eq!(-1i128, black_box(kind) as i128);
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test_as_arg(Nums::NegOne);
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assert_eq!(-1i8, NEG_ONE_I8);
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assert_eq!(-1i16, NEG_ONE_I16);
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assert_eq!(-1i32, NEG_ONE_I32);
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assert_eq!(-1i64, NEG_ONE_I64);
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assert_eq!(-1i128, NEG_ONE_I128);
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}
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