primitive.rs.html -- source
Description: Source to the Rust file `library/core/src/primitive.rs`.
Keywords: rust, rustlang, rust-lang

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    //! 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;