| // This file tests repr(transparent)-related errors reported during typeck. Other errors |
| // that are reported earlier and therefore preempt these are tested in: |
| // - repr-transparent-other-reprs.rs |
| // - repr-transparent-other-items.rs |
| |
| #![feature(transparent_unions)] |
| |
| use std::marker::PhantomData; |
| |
| #[repr(transparent)] |
| struct NoFields; //~ ERROR needs exactly one non-zero-sized field |
| |
| #[repr(transparent)] |
| struct ContainsOnlyZst(()); //~ ERROR needs exactly one non-zero-sized field |
| |
| #[repr(transparent)] |
| struct ContainsOnlyZstArray([bool; 0]); //~ ERROR needs exactly one non-zero-sized field |
| |
| #[repr(transparent)] |
| struct ContainsMultipleZst(PhantomData<*const i32>, NoFields); |
| //~^ ERROR needs exactly one non-zero-sized field |
| |
| #[repr(transparent)] |
| struct MultipleNonZst(u8, u8); //~ ERROR needs exactly one non-zero-sized field |
| |
| trait Mirror { type It: ?Sized; } |
| impl<T: ?Sized> Mirror for T { type It = Self; } |
| |
| #[repr(transparent)] |
| pub struct StructWithProjection(f32, <f32 as Mirror>::It); |
| //~^ ERROR needs exactly one non-zero-sized field |
| |
| #[repr(transparent)] |
| struct NontrivialAlignZst(u32, [u16; 0]); //~ ERROR alignment larger than 1 |
| |
| #[repr(align(32))] |
| struct ZstAlign32<T>(PhantomData<T>); |
| |
| #[repr(transparent)] |
| struct GenericAlign<T>(ZstAlign32<T>, u32); //~ ERROR alignment larger than 1 |
| |
| #[repr(transparent)] //~ ERROR unsupported representation for zero-variant enum |
| enum Void {} |
| //~^ ERROR transparent enum needs exactly one variant, but has 0 |
| |
| #[repr(transparent)] |
| enum FieldlessEnum { //~ ERROR transparent enum needs exactly one non-zero-sized field, but has 0 |
| Foo, |
| } |
| |
| #[repr(transparent)] |
| enum TooManyFieldsEnum { |
| Foo(u32, String), |
| } |
| //~^^^ ERROR transparent enum needs exactly one non-zero-sized field, but has 2 |
| |
| #[repr(transparent)] |
| enum TooManyVariants { //~ ERROR transparent enum needs exactly one variant, but has 2 |
| Foo(String), |
| Bar, |
| } |
| |
| #[repr(transparent)] |
| enum NontrivialAlignZstEnum { |
| Foo(u32, [u16; 0]), //~ ERROR alignment larger than 1 |
| } |
| |
| #[repr(transparent)] |
| enum GenericAlignEnum<T> { |
| Foo { bar: ZstAlign32<T>, baz: u32 } //~ ERROR alignment larger than 1 |
| } |
| |
| #[repr(transparent)] |
| union UnitUnion { //~ ERROR transparent union needs exactly one non-zero-sized field, but has 0 |
| u: (), |
| } |
| |
| #[repr(transparent)] |
| union TooManyFields { //~ ERROR transparent union needs exactly one non-zero-sized field, but has 2 |
| u: u32, |
| s: i32 |
| } |
| |
| fn main() {} |