rust-lang/rust 0.11.0

Rust 0.11.0

on GitHub

~1700 changes, numerous bugfixes

Language

• ~[T] has been removed from the language. This type is superseded by the Vec type.
• ~str has been removed from the language. This type is superseded by the String type.
• ~T has been removed from the language. This type is superseded by the Box type.
• @t has been removed from the language. This type is superseded by the standard library's std::gc::Gc type.
• Struct fields are now all private by default.
• Vector indices and shift amounts are both required to be a uint instead of any integral type.
• Byte character, byte string, and raw byte string literals are now all supported by prefixing the normal literal with a b.
• Multiple ABIs are no longer allowed in an ABI string
• The syntax for lifetimes on closures/procedures has been tweaked slightly: <'a>|A, B|: 'b + K -> T
• Floating point modulus has been removed from the language; however it is still provided by a library implementation.
• Private enum variants are now disallowed.
• The priv keyword has been removed from the language.
• A closure can no longer be invoked through a &-pointer.
• The use foo, bar, baz; syntax has been removed from the language.
• The transmute intrinsic no longer works on type parameters.
• Statics now allow blocks/items in their definition.
• Trait bounds are separated from objects with + instead of : now.
• Objects can no longer be read while they are mutably borrowed.
• The address of a static is now marked as insignificant unless the #[inline(never)] attribute is placed it.
• The #[unsafe_destructor] attribute is now behind a feature gate.
• Struct literals are no longer allowed in ambiguous positions such as if, while, match, and for..in.
• Declaration of lang items and intrinsics are now feature-gated by default.
• Integral literals no longer default to int, and floating point literals no longer default to f64. Literals must be suffixed with an appropriate type if inference cannot determine the type of the literal.
• The Box type is no longer implicitly borrowed to &mut T.
• Procedures are now required to not capture borrowed references.

Libraries

• The standard library is now a "facade" over a number of underlying libraries. This means that development on the standard library should be speedier due to smaller crates, as well as a clearer line between all dependencies.
• A new library, libcore, lives under the standard library's facade which is Rust's "0-assumption" library, suitable for embedded and kernel development for example.
• A regex crate has been added to the standard distribution. This crate includes statically compiled regular expressions.
• The unwrap/unwrap_err methods on Result require a Show bound for better error messages.
• The return types of the std::comm primitives have been centralized around the Result type.
• A number of I/O primitives have gained the ability to time out their operations.
• A number of I/O primitives have gained the ability to close their reading/writing halves to cancel pending operations.
• Reverse iterator methods have been removed in favor of rev() on their forward-iteration counterparts.
• A bitflags! macro has been added to enable easy interop with C and management of bit flags.
• A debug_assert! macro is now provided which is disabled when --cfg ndebug is passed to the compiler.
• A graphviz crate has been added for creating .dot files.
• The std::cast module has been migrated into std::mem.
• The std::local_data api has been migrated from freestanding functions to being based on methods.
• The Pod trait has been renamed to Copy.
• jemalloc has been added as the default allocator for types.
• The API for allocating memory has been changed to use proper alignment and sized deallocation
• Connecting a TcpStream or binding a TcpListener is now based on a string address and a u16 port. This allows connecting to a hostname as opposed to an IP.
• The Reader trait now contains a core method, read_at_least(), which correctly handles many repeated 0-length reads.
• The process-spawning API is now centered around a builder-style Command struct.
• The :? printing qualifier has been moved from the standard library to an external libdebug crate.
• Eq/Ord have been renamed to PartialEq/PartialOrd. TotalEq/TotalOrd have been renamed to Eq/Ord.
• The select/plural methods have been removed from format!. The escapes for { and } have also changed from { and } to {{ and }}, respectively.
• The TaskBuilder API has been re-worked to be a true builder, and extension traits for spawning native/green tasks have been added.

Tooling

• All breaking changes to the language or libraries now have their commit message annotated with [breaking-change] to allow for easy discovery of breaking changes.
• The compiler will now try to suggest how to annotate lifetimes if a lifetime-related error occurs.
• Debug info continues to be improved greatly with general bug fixes and better support for situations like link time optimization (LTO).
• Usage of syntax extensions when cross-compiling has been fixed.
• Functionality equivalent to GCC & Clang's -ffunction-sections, -fdata-sections and --gc-sections has been enabled by default
• The compiler is now stricter about where it will load module files from when a module is declared via mod foo;.
• The #[phase(syntax)] attribute has been renamed to #[phase(plugin)]. Syntax extensions are now discovered via a "plugin registrar" type which will be extended in the future to other various plugins.
• Lints have been restructured to allow for dynamically loadable lints.
• A number of rustdoc improvements:
  • The HTML output has been visually redesigned.
  • Markdown is now powered by hoedown instead of sundown.
  • Searching heuristics have been greatly improved.
  • The search index has been reduced in size by a great amount.
  • Cross-crate documentation via pub use has been greatly improved.
  • Primitive types are now hyperlinked and documented.
• Documentation has been moved from static.rust-lang.org/doc to doc.rust-lang.org
• A new sandbox, play.rust-lang.org, is available for running and sharing rust code examples on-line.
• Unused attributes are now more robustly warned about.
• The dead_code lint now warns about unused struct fields.
• Cross-compiling to iOS is now supported.
• Cross-compiling to mipsel is now supported.
• Stability attributes are now inherited by default and no longer apply to intra-crate usage, only inter-crate usage.
• Error message related to non-exhaustive match expressions have been greatly improved.