54 lines
1.4 KiB
Rust
54 lines
1.4 KiB
Rust
//! Regression test for an LLVM assertion that used to be hit when:
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//!
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//! - There's a generic enum contained within a tuple struct
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//! - When the tuple struct is parameterized by some lifetime `'a`
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//! - The enum is concretized with its type argument being a reference to a trait object (of
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//! lifetime `'a`)
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//!
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//! Issue: <https://github.com/rust-lang/rust/issues/9719>
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//@ build-pass
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// Dummy trait implemented for `isize` to use in the test cases
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pub trait MyTrait {
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fn dummy(&self) {}
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}
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impl MyTrait for isize {}
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// `&dyn MyTrait` contained in enum variant
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pub struct EnumRefDynTrait<'a>(Enum<&'a (dyn MyTrait + 'a)>);
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pub enum Enum<T> {
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Variant(T),
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}
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fn enum_dyn_trait() {
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let x: isize = 42;
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let y = EnumRefDynTrait(Enum::Variant(&x as &dyn MyTrait));
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let _ = y;
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}
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// `&dyn MyTrait` contained behind `Option` in named field of struct
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struct RefDynTraitNamed<'a> {
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x: Option<&'a (dyn MyTrait + 'a)>,
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}
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fn named_option_dyn_trait() {
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let x: isize = 42;
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let y = RefDynTraitNamed { x: Some(&x as &dyn MyTrait) };
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let _ = y;
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}
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// `&dyn MyTrait` contained behind `Option` in unnamed field of struct
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pub struct RefDynTraitUnnamed<'a>(Option<&'a (dyn MyTrait + 'a)>);
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fn unnamed_option_dyn_trait() {
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let x: isize = 42;
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let y = RefDynTraitUnnamed(Some(&x as &dyn MyTrait));
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let _ = y;
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}
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pub fn main() {
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enum_dyn_trait();
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named_option_dyn_trait();
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unnamed_option_dyn_trait();
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}
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