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Diffstat (limited to '')
-rw-r--r-- | library/core/src/primitive.rs | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/library/core/src/primitive.rs b/library/core/src/primitive.rs new file mode 100644 index 000000000..e20b2c5c9 --- /dev/null +++ b/library/core/src/primitive.rs @@ -0,0 +1,67 @@ +//! This module reexports the primitive types to allow usage that is not +//! possibly shadowed by other declared types. +//! +//! This is normally only useful in macro generated code. +//! +//! An example of this is when generating a new struct and an impl for it: +//! +//! ```rust,compile_fail +//! pub struct bool; +//! +//! impl QueryId for bool { +//! const SOME_PROPERTY: bool = true; +//! } +//! +//! # trait QueryId { const SOME_PROPERTY: core::primitive::bool; } +//! ``` +//! +//! Note that the `SOME_PROPERTY` associated constant would not compile, as its +//! type `bool` refers to the struct, rather than to the primitive bool type. +//! +//! A correct implementation could look like: +//! +//! ```rust +//! # #[allow(non_camel_case_types)] +//! pub struct bool; +//! +//! impl QueryId for bool { +//! const SOME_PROPERTY: core::primitive::bool = true; +//! } +//! +//! # trait QueryId { const SOME_PROPERTY: core::primitive::bool; } +//! ``` + +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use bool; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use char; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use f32; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use f64; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use i128; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use i16; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use i32; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use i64; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use i8; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use isize; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use str; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use u128; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use u16; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use u32; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use u64; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use u8; +#[stable(feature = "core_primitive", since = "1.43.0")] +pub use usize; |