4e2797dd76
Negating a non-zero integer currently requires unpacking to a
primitive and re-wrapping. Since negation of non-zero signed
integers always produces a non-zero result, it is safe to
implement `Neg` for `NonZeroI{N}`.
The new `impl` is marked as stable because trait implementations
for two stable types can't be marked unstable.
13 lines
282 B
Rust
13 lines
282 B
Rust
// run-fail
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// error-pattern:thread 'main' panicked at 'attempt to negate with overflow'
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// ignore-emscripten no processes
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// compile-flags: -C debug-assertions
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#![allow(arithmetic_overflow)]
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use std::num::NonZeroI8;
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fn main() {
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let _x = -NonZeroI8::new(i8::MIN).unwrap();
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}
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