33 lines
711 B
Plaintext
33 lines
711 B
Plaintext
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== Why is this an issue?
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Using `repr(isize/usize)` for C-like enumerations with values that don't fit into an `i32` can lead to truncated variant values on 32-bit architectures, potentially causing unexpected behavior.
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=== Code examples
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==== Noncompliant code example
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[source,rust,diff-id=1,diff-type=noncompliant]
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----
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#[repr(usize)]
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enum NonPortable {
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X = 0x1_0000_0000, // Noncompliant
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Y = 0,
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}
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----
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==== Compliant solution
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[source,rust,diff-id=1,diff-type=compliant]
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----
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#[repr(u64)]
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enum Portable {
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X = 0x1_0000_0000, // Compliant
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Y = 0,
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}
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----
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== Resources
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=== Documentation
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* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#enum_clike_unportable_variant
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