mirror of https://github.com/rust-lang/rust
39 lines
957 B
Rust
39 lines
957 B
Rust
#[repr(u8)]
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enum Eu8 {
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Au8 = 23,
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Bu8 = 223,
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Cu8 = -23,
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//~^ ERROR cannot apply unary operator `-` to type `u8`
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}
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#[repr(u16)]
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enum Eu16 {
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Au16 = 23,
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Bu16 = 55555,
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Cu16 = -22333,
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//~^ ERROR cannot apply unary operator `-` to type `u16`
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}
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#[repr(u32)]
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enum Eu32 {
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Au32 = 23,
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Bu32 = 3_000_000_000,
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Cu32 = -2_000_000_000,
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//~^ ERROR cannot apply unary operator `-` to type `u32`
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}
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#[repr(u64)]
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enum Eu64 {
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Au32 = 23,
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Bu32 = 3_000_000_000,
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Cu32 = -2_000_000_000,
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//~^ ERROR cannot apply unary operator `-` to type `u64`
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}
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// u64 currently allows negative numbers, and i64 allows numbers greater than `1<<63`. This is a
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// little counterintuitive, but since the discriminant can store all the bits, and extracting it
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// with a cast requires specifying the signedness, there is no loss of information in those cases.
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// This also applies to isize and usize on 64-bit targets.
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pub fn main() { }
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