編譯型編程語言Rust v1.14.0 發布

Rust是一個由Mozilla主導開發的通用、編譯型編程語言。它的設計準則為“安全，并發，實用”，支持函數式，并發式，過程式以及面向對象的編程風格。Rust 的設計目標之一，是要使設計大型的互聯網客戶端和服務器的任務變得更容易。因此更加強調安全性、內存配置、以及并發處理等方面的特性。在性能上，具有額外安全保證的代碼會比 C++ 慢一些，但是如果以 C++ 也手工提供保證的情況下，則兩者性能上是相似的。

更新日志

• .. matches multiple tuple fields in enum variants, structs and tuples. RFC 1492.
• Safe fn items can be coerced to unsafe fn pointers
• use * and use ::* both glob-import from the crate root
• It's now possible to call a Vec<Box<Fn()>> without explicit dereferencing
• Mark enums with non-zero discriminant as non-zero
• Lower-case static mut names are linted like other statics and consts
• Fix ICE on some macros in const integer positions (e.g. [u8; m!()])
• Improve error message and snippet for "did you mean x"
• Add a panic-strategy field to the target specification
• Include LLVM version in --version --verbose
• Improve macro expansion performance
• Shrink Expr_::ExprInlineAsm
• Replace all uses of SHA-256 with BLAKE2b
• Reduce the number of bytes hashed by IchHasher
• Avoid more allocations when compiling html5ever
• Use SmallVector in CombineFields::instantiate
• Avoid some allocations in the macro parser
• Use a faster deflate setting
• Add ArrayVec and AccumulateVec to reduce heap allocations during interning of slices
• Optimize write_metadata
• Don't process obligation forest cycles when stalled
• Avoid many CrateConfig clones
• Optimize Substs::super_fold_with
• Optimize ObligationForest's NodeState handling
• Speed up plug_leaks
• println!(), with no arguments, prints newline. Previously, an empty string was required to achieve the same.
• Wrapping impls standard binary and unary operators, as well as the Sum and Product iterators
• Implement From<Cow<str>> for String and From<Cow<[T]>> for Vec<T>
• Improve fold performance for chain, cloned, map, and VecDeque iterators
• Improve SipHasher performance on small values
• Add Iterator trait TrustedLen to enable better FromIterator / Extend
• Expand .zip() specialization to .map() and .cloned()
• ReadDir implements Debug
• Implement RefUnwindSafe for atomic types
• Specialize Vec::extend to Vec::extend_from_slice
• Avoid allocations in Decoder::read_str
• io::Error implements From<io::ErrorKind>
• Impl Debug for raw pointers to unsized data
• Don't reuse HashMap random seeds
• The internal memory layout of HashMap is more cache-friendly, for significant improvements in some operations
• HashMap uses less memory on 32-bit architectures
• Impl Add<{str, Cow<str>}> for Cow<str>

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