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//! Rust 标准库的 prelude 的第一个版本。
//!
//! 有关更多信息，请参见 [模块级文档](super)。

#![stable(feature = "rust1", since = "1.0.0")]

// 重导出核心运算符
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::marker::{Send, Sized, Sync, Unpin};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::ops::{Drop, Fn, FnMut, FnOnce};

// 重导出函数
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::mem::drop;

// 重导出的类型和 traits
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::convert::{AsMut, AsRef, From, Into};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::iter::{DoubleEndedIterator, ExactSizeIterator};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::iter::{Extend, IntoIterator, Iterator};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::option::Option::{self, None, Some};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::result::Result::{self, Err, Ok};

// 重导出内置宏
#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
#[allow(deprecated)]
#[doc(no_inline)]
pub use core::prelude::v1::{
    assert, cfg, column, compile_error, concat, concat_idents, env, file, format_args,
    format_args_nl, include, include_bytes, include_str, line, log_syntax, module_path, option_env,
    stringify, trace_macros, Clone, Copy, Debug, Default, Eq, Hash, Ord, PartialEq, PartialOrd,
};

#[unstable(
    feature = "concat_bytes",
    issue = "87555",
    reason = "`concat_bytes` is not stable enough for use and is subject to change"
)]
#[doc(no_inline)]
pub use core::prelude::v1::concat_bytes;

// 不要 `doc(inline)` 的这些 `doc(hidden)` 项。
#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
#[allow(deprecated)]
pub use core::prelude::v1::{RustcDecodable, RustcEncodable};

// 不要 `doc(no_inline)` 使它们自己成为 doc 项 (没有公共模块供它们重新导出)。
//
#[stable(feature = "builtin_macro_prelude", since = "1.38.0")]
pub use core::prelude::v1::{
    alloc_error_handler, bench, derive, global_allocator, test, test_case,
};

#[unstable(feature = "derive_const", issue = "none")]
pub use core::prelude::v1::derive_const;

// 也不要 `doc(no_inline)`。
#[unstable(
    feature = "cfg_accessible",
    issue = "64797",
    reason = "`cfg_accessible` is not fully implemented"
)]
pub use core::prelude::v1::cfg_accessible;

// 也不要 `doc(no_inline)`。
#[unstable(
    feature = "cfg_eval",
    issue = "82679",
    reason = "`cfg_eval` is a recently implemented feature"
)]
pub use core::prelude::v1::cfg_eval;

// 也不要 `doc(no_inline)`。
#[unstable(
    feature = "type_ascription",
    issue = "23416",
    reason = "placeholder syntax for type ascription"
)]
pub use core::prelude::v1::type_ascribe;

// 到目前为止的文件相当于 core/src/prelude/v1.rs。
// 它是重复的而不是 glob 导入的，因为我们希望文档将这些重新引导显示为指向 `std` 内。
//
// 下面是来自 alloc crate 的项目。

#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::borrow::ToOwned;
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::boxed::Box;
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::string::{String, ToString};
#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use crate::vec::Vec;