mirror of https://github.com/rust-lang/rust
39 lines
925 B
Rust
39 lines
925 B
Rust
#![feature(rustc_attrs)]
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#![allow(dead_code)]
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// See also: repr-c-dead-variants.rs
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//@ normalize-stderr-test: "pref: Align\([1-8] bytes\)" -> "pref: $$SOME_ALIGN"
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// A simple uninhabited type.
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enum Void {}
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// Compiler must not remove dead variants of `#[repr(C, int)]` ADTs.
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#[repr(C, u8)]
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#[rustc_layout(debug)]
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enum UnivariantU8 { //~ ERROR layout_of
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Variant(Void),
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}
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// ADTs with variants that have fields must have space allocated for those fields.
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#[repr(C, u8)]
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#[rustc_layout(debug)]
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enum TwoVariantsU8 { //~ ERROR layout_of
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Variant1(Void),
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Variant2(u8),
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}
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// Some targets have 4-byte-aligned u64, make it always 8-byte-aligned.
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#[repr(C, align(8))]
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struct Align8U64(u64);
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// This one is 2 x u64: we reserve space for fields in a dead branch.
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#[repr(C, u8)]
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#[rustc_layout(debug)]
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enum DeadBranchHasOtherFieldU8 { //~ ERROR layout_of
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Variant1(Void, Align8U64),
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Variant2(u8),
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}
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fn main() {}
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