src/libcore/primitive.rs

   1 //! This module reexports the primitive types to allow usage that is not
   2 //! possibly shadowed by other declared types.
   3 //!
   4 //! This is normally only useful in macro generated code.
   5 //!
   6 //! An example of this is when generating a new struct and an impl for it:
   7 //!
   8 //! ```rust,compile_fail
   9 //! pub struct bool;
  10 //!
  11 //! impl QueryId for bool {
  12 //!     const SOME_PROPERTY: bool = true;
  13 //! }
  14 //!
  15 //! # trait QueryId { const SOME_PROPERTY: core::primitive::bool; }
  16 //! ```
  17 //!
  18 //! Note that the `SOME_PROPERTY` associated constant would not compile, as its
  19 //! type `bool` refers to the struct, rather than to the primitive bool type.
  20 //!
  21 //! A correct implementation could look like:
  22 //!
  23 //! ```rust
  24 //! # #[allow(non_camel_case_types)]
  25 //! pub struct bool;
  26 //!
  27 //! impl QueryId for bool {
  28 //!     const SOME_PROPERTY: core::primitive::bool = true;
  29 //! }
  30 //!
  31 //! # trait QueryId { const SOME_PROPERTY: core::primitive::bool; }
  32 //! ```
  33
  34 #[stable(feature = "core_primitive", since = "1.43.0")]
  35 pub use bool;
  36 #[stable(feature = "core_primitive", since = "1.43.0")]
  37 pub use char;
  38 #[stable(feature = "core_primitive", since = "1.43.0")]
  39 pub use f32;
  40 #[stable(feature = "core_primitive", since = "1.43.0")]
  41 pub use f64;
  42 #[stable(feature = "core_primitive", since = "1.43.0")]
  43 pub use i128;
  44 #[stable(feature = "core_primitive", since = "1.43.0")]
  45 pub use i16;
  46 #[stable(feature = "core_primitive", since = "1.43.0")]
  47 pub use i32;
  48 #[stable(feature = "core_primitive", since = "1.43.0")]
  49 pub use i64;
  50 #[stable(feature = "core_primitive", since = "1.43.0")]
  51 pub use i8;
  52 #[stable(feature = "core_primitive", since = "1.43.0")]
  53 pub use isize;
  54 #[stable(feature = "core_primitive", since = "1.43.0")]
  55 pub use str;
  56 #[stable(feature = "core_primitive", since = "1.43.0")]
  57 pub use u128;
  58 #[stable(feature = "core_primitive", since = "1.43.0")]
  59 pub use u16;
  60 #[stable(feature = "core_primitive", since = "1.43.0")]
  61 pub use u32;
  62 #[stable(feature = "core_primitive", since = "1.43.0")]
  63 pub use u64;
  64 #[stable(feature = "core_primitive", since = "1.43.0")]
  65 pub use u8;
  66 #[stable(feature = "core_primitive", since = "1.43.0")]
  67 pub use usize;