Rust Search

Operator expressions

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~28 min read

Block expressions

Block expressions BlockExpression -> `{` InnerAttribute* Statements? `}` BlockExpressionNoInnerAttributes -> `{` Statements? `}` Statements -> Statement+ | Statement+ ExpressionWithoutBlock | ExpressionWithoutBlock A block expression, or bl...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~7 min read

Path expressions

Path expressions PathExpression -> PathInExpression | QualifiedPathInExpression A path used as an expression context denotes either a local variable or an item. Path expressions that resolve to local or static variables are place expression...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~1 min read

Literal expressions

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~12 min read

Expressions

Expressions Expression -> ExpressionWithoutBlock | ExpressionWithBlock ExpressionWithoutBlock -> OuterAttribute* ExpressionWithoutBlockNoAttrs ExpressionWithoutBlockNoAttrs -> LiteralExpression | PathExpression | OperatorExpression | Groupe...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~9 min read

Statements

Statements Statement -> `;` | Item | LetStatement | ExpressionStatement | OuterAttribute* MacroInvocationSemi A statement is a component of a block, which is in turn a component of an outer expression or function. Rust has two kinds of stat...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~3 min read

Statements and expressions

Statements and expressions Rust is primarily an expression language. This means that most forms of value-producing or effect-causing evaluation are directed by the uniform syntax category of expressions. Each kind of expression can typicall...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~1 min read

Debugger attributes

Debugger attributes The following attributes are used for enhancing the debugging experience when using third-party debuggers like GDB or WinDbg. The debugger_visualizer attribute The debugger_visualizer attribute can be used to embed a deb...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~3 min read

Type system attributes

Type system attributes The following attributes are used for changing how a type can be used. The non_exhaustive attribute The non_exhaustive attribute indicates that a type or variant may have more fields or variants added in the future. I...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~4 min read

Limits

Limits The following attributes affect compile-time limits. The recursion_limit attribute The recursion_limit attribute may be applied at the crate level to set the maximum depth for potentially infinitely-recursive compile-time operations...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~1 min read

Code generation attributes

Code generation attributes The following attributes are used for controlling code generation. The inline attribute The inline attribute suggests whether a copy of the attributed function's code should be placed in the caller rather than gen...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~22 min read

Diagnostic attributes

Diagnostic attributes The following attributes are used for controlling or generating diagnostic messages during compilation. Lint check attributes A lint check names a potentially undesirable coding pattern, such as unreachable code or omi...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~17 min read

Derive

Derive The derive [attribute][attributes] invokes one or more derive macros, allowing new items to be automatically generated for data structures. You can create derive macros with procedural macros. [!EXAMPLE] The [PartialEq][macro@Partial...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~1 min read

Testing attributes

Testing attributes The following attributes are used for specifying functions for performing tests. Compiling a crate in "test" mode enables building the test functions along with a test harness for executing the tests. Enabling the test mo...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~3 min read

Attributes

Attributes InnerAttribute -> `#` `!` `[` Attr `]` OuterAttribute -> `#` `[` Attr `]` Attr -> SimplePath AttrInput? | `unsafe` `(` SimplePath AttrInput? `)` AttrInput -> DelimTokenTree | `=` Expression An attribute is a general, free-form me...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~7 min read

Associated items

Associated items AssociatedItem -> OuterAttribute* ( MacroInvocationSemi | ( Visibility? ( TypeAlias | ConstantItem | Function ) ) ) Associated Items are the items declared in traits or defined in implementations. They are called this becau...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~10 min read

Generic parameters

Generic parameters GenericParams -> `<` ( GenericParam (`,` GenericParam)* `,`? )? `>` GenericParam -> OuterAttribute* ( LifetimeParam | TypeParam | ConstParam ) LifetimeParam -> Lifetime ( `:` LifetimeBounds )? TypeParam -> IDENTIFIER ( `:...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~7 min read

External blocks

External blocks ExternBlock -> `unsafe`?[^unsafe-2024] `extern` Abi? `{` InnerAttribute* ExternalItem* `}` ExternalItem -> OuterAttribute* ( MacroInvocationSemi | Visibility? StaticItem | Visibility? Function ) [^unsafe-2024]: Starting with...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~13 min read

Implementations

Implementations Implementation -> InherentImpl | TraitImpl InherentImpl -> `impl` GenericParams? Type WhereClause? `{` InnerAttribute* AssociatedItem* `}` TraitImpl -> `unsafe`? `impl` GenericParams? `!`? TypePath `for` Type WhereClause? `{...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~6 min read

Traits

Traits Trait -> `unsafe`? `trait` IDENTIFIER GenericParams? ( `:` Bounds? )? WhereClause? `{` InnerAttribute* AssociatedItem* `}` A trait describes an abstract interface that types can implement. This interface consists of associated items,...

doc.rust-lang.org The Rust Reference Book 2024-01-01 ~8 min read