1 //! Re-exports either the Rust `std` library or `core` and `alloc` when `std` is
2 //! disabled.
3 //!
4 //! `crate::stdlib::...` should be used rather than `std::` when adding code that
5 //! will be available with the standard library disabled.
6 //!
7 //! Note that this module is called `stdlib` rather than `std`, as Rust 1.34.0
8 //! does not permit redefining the name `stdlib` (although this works on the
9 //! latest stable Rust).
10 #[cfg(feature = "std")]
11 pub(crate) use std::*;
12 
13 #[cfg(not(feature = "std"))]
14 pub(crate) use self::no_std::*;
15 
16 #[cfg(not(feature = "std"))]
17 mod no_std {
18     // We pre-emptively export everything from libcore/liballoc, (even modules
19     // we aren't using currently) to make adding new code easier. Therefore,
20     // some of these imports will be unused.
21     #![allow(unused_imports)]
22 
23     pub(crate) use core::{
24         any, array, ascii, cell, char, clone, cmp, convert, default, f32, f64, ffi, future, hash,
25         hint, i128, i16, i8, isize, iter, marker, mem, num, ops, option, pin, ptr, result, task,
26         time, u128, u16, u32, u8, usize,
27     };
28 
29     pub(crate) use alloc::{boxed, collections, rc, string, vec};
30 
31     pub(crate) mod borrow {
32         pub(crate) use alloc::borrow::*;
33         pub(crate) use core::borrow::*;
34     }
35 
36     pub(crate) mod fmt {
37         pub(crate) use alloc::fmt::*;
38         pub(crate) use core::fmt::*;
39     }
40 
41     pub(crate) mod slice {
42         pub(crate) use alloc::slice::*;
43         pub(crate) use core::slice::*;
44     }
45 
46     pub(crate) mod str {
47         pub(crate) use alloc::str::*;
48         pub(crate) use core::str::*;
49     }
50 
51     pub(crate) mod sync {
52         pub(crate) use alloc::sync::*;
53         pub(crate) use core::sync::*;
54     }
55 }
56