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This repository was archived by the owner on Sep 30, 2020. It is now read-only.
Rust 起步的目标是创建一个安全且合用的系统编程语言。为了追求这个目标，它探索了很多想法，其中一些（生命周期、traits）被保留，而其他则被丢弃（类型体系系统、绿色线程）。 Also, in the run up to 1.0 a lot of the standard library was rewritten as early designs were updated to best use Rust's features and provide quality, consistent cross-platform APIs. 现在的 Rust 已达到了 1.0，语言保证为“稳定”（stable）；虽然它可能继续演变，但对于目前的 Rust 来说，代码在未来的发行版本上能继续工作。
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Rust 起步的目标是创建一个安全且合用的系统编程语言。为了追求这个目标，它探索了很多想法，其中一些（生命周期、traits）被保留，而其他则被丢弃（类型体系系统、绿色线程）。 Also, in the run up to 1.0 a lot of the standard library was rewritten as early designs were updated to best use Rust's features and provide quality, consistent cross-platform APIs. 现在的 Rust 已达到了 1.0，语言保证为「稳定」（stable）；虽然它可能继续演变，但对于目前的 Rust 来说，代码在未来的发行版本上能继续工作。
“特性门控”（Feature Gates）是 Rust 用来稳定编译器、语言和标准库特性的机制。 A feature that is "gated" is accessible only on the nightly release channel, and then only when it has been explicitly enabled through `#[feature]` attributes or the `-Z unstable-options` command line argument. When a feature is stabilized it becomes available on the stable release channel, and does not need to be explicitly enabled. At that point the feature is considered "ungated". Feature gates allow developers to test experimental features while they are under development, before they are available in the stable language.
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「特性门控」（Feature Gates）是 Rust 用来稳定编译器、语言和标准库特性的机制。 A feature that is "gated" is accessible only on the nightly release channel, and then only when it has been explicitly enabled through `#[feature]` attributes or the `-Z unstable-options` command line argument. When a feature is stabilized it becomes available on the stable release channel, and does not need to be explicitly enabled. At that point the feature is considered "ungated". Feature gates allow developers to test experimental features while they are under development, before they are available in the stable language.
This error means that the value you're trying to use has been moved to a new owner. The first thing to check is whether the move in question was necessary: if it moved into a function, it may be possible to rewrite the function to use a reference, rather than moving. Otherwise if the type being moved implements [`Clone`][Clone], then calling `clone()` on it before moving will move a copy of it, leaving the original still available for further use. Note though that cloning a value should typically be the last resort since cloning can be expensive, causing further allocations.
@@ -721,7 +721,7 @@ it explicitly. The rules are as follows:
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If these rules result in compilation errors, the Rust compiler will provide an error message indicating the error caused, and suggesting a potential solution based on which step of the inference process caused the error.
The only way to construct a value of type `&Foo` or `&mut Foo` is to specify an existing value of type `Foo` that the reference points to. The reference "borrows" the original value for a given region of code (the lifetime of the reference), and the value being borrowed from cannot be moved or destroyed for the duration of the borrow.
@@ -735,7 +735,7 @@ You can do that with the [`Option`][Option] type, which can either be `Some(T)`
The Rust standard library includes libbacktrace and libunwind, which may be undesirable in some programs. Using `#![no_std]` can thus result in smaller binaries, but will also usually result in substantial changes to the sort of Rust code you're writing. Note that using Rust without the standard library is often functionally closer to the equivalent C code.
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