Module serde::lib::core

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Unstable module containing the unstable assert_matches macro.


Composable asynchronous iteration.


Support for capturing a stack backtrace of an OS thread


Compiler intrinsics.


Lazy values and one-time initialization of static data.


Portable SIMD module.

Memory allocation APIs.

This module implements the Any trait, which enables dynamic typing of any 'static type through runtime reflection.

SIMD and vendor intrinsics module.

Helper functions and types for fixed-length arrays.

Operations on ASCII strings and characters.

A module for working with borrowed data.

A pointer type for heap allocation.

Shareable mutable containers.

A character type.

The Clone trait for types that cannot be ‘implicitly copied’.

Functionality for ordering and comparison.

Collection types.

Traits for conversions between types.

The Default trait for types which may have meaningful default values.

Inspection and manipulation of the process’s environment.

Traits for working with Errors.

Constants specific to the f32 single-precision floating point type.

Constants specific to the f64 double-precision floating point type.

Utilities related to FFI bindings.

Utilities for formatting and printing Strings.

Filesystem manipulation operations.

Asynchronous basic functionality.

Generic hashing support.

Hints to compiler that affects how code should be emitted or optimized. Hints may be compile time or runtime.

i8Deprecation planned

Constants for the 8-bit signed integer type.

i16Deprecation planned

Constants for the 16-bit signed integer type.

i32Deprecation planned

Constants for the 32-bit signed integer type.

i64Deprecation planned

Constants for the 64-bit signed integer type.

i128Deprecation planned

Constants for the 128-bit signed integer type.

Traits, helpers, and type definitions for core I/O functionality.

isizeDeprecation planned

Constants for the pointer-sized signed integer type.

Composable external iteration.

Primitive traits and types representing basic properties of types.

Basic functions for dealing with memory.

Networking primitives for TCP/UDP communication.

Additional functionality for numerics.

Overloadable operators.

Optional values.

OS-specific functionality.

Panic support in the standard library.

Cross-platform path manipulation.

Types that pin data to its location in memory.

The Rust Prelude

This module reexports the primitive types to allow usage that is not possibly shadowed by other declared types.

A module for working with processes.

Manually manage memory through raw pointers.

Single-threaded reference-counting pointers. ‘Rc’ stands for ‘Reference Counted’.

Error handling with the Result type.

A dynamically-sized view into a contiguous sequence, [T].

Unicode string slices.

A UTF-8–encoded, growable string.

Useful synchronization primitives.

Types and Traits for working with asynchronous tasks.

Native threads.

Temporal quantification.

u8Deprecation planned

Constants for the 8-bit unsigned integer type.

u16Deprecation planned

Constants for the 16-bit unsigned integer type.

u32Deprecation planned

Constants for the 32-bit unsigned integer type.

u64Deprecation planned

Constants for the 64-bit unsigned integer type.

u128Deprecation planned

Constants for the 128-bit unsigned integer type.

usizeDeprecation planned

Constants for the pointer-sized unsigned integer type.

A contiguous growable array type with heap-allocated contents, written Vec<T>.



Concatenates literals into a byte slice.


Concatenates identifiers into one identifier.


Same as format_args, but can be used in some const contexts.


Same as format_args, but adds a newline in the end.


Prints passed tokens into the standard output.


Enables or disables tracing functionality used for debugging other macros.

Asserts that a boolean expression is true at runtime.

Asserts that two expressions are equal to each other (using PartialEq).

Asserts that two expressions are not equal to each other (using PartialEq).

Evaluates boolean combinations of configuration flags at compile-time.

Expands to the column number at which it was invoked.

Causes compilation to fail with the given error message when encountered.

Concatenates literals into a static string slice.

Prints and returns the value of a given expression for quick and dirty debugging.

Asserts that a boolean expression is true at runtime.

Asserts that two expressions are equal to each other.

Asserts that two expressions are not equal to each other.

Inspects an environment variable at compile time.

Prints to the standard error.

Prints to the standard error, with a newline.

Expands to the file name in which it was invoked.

Creates a String using interpolation of runtime expressions.

Constructs parameters for the other string-formatting macros.

Parses a file as an expression or an item according to the context.

Includes a file as a reference to a byte array.

Includes a UTF-8 encoded file as a string.

A macro to test at runtime whether a CPU feature is available on x86/x86-64 platforms.

Expands to the line number on which it was invoked.

Returns whether the given expression matches any of the given patterns.

Expands to a string that represents the current module path.

Optionally inspects an environment variable at compile time.

Panics the current thread.

Prints to the standard output.

Prints to the standard output, with a newline.

Stringifies its arguments.

Declare a new thread local storage key of type std::thread::LocalKey.

Indicates unfinished code.


Unwraps a result or propagates its error.

Indicates unimplemented code by panicking with a message of “not implemented”.

Indicates unreachable code.

Creates a Vec containing the arguments.

Writes formatted data into a buffer.

Write formatted data into a buffer, with a newline appended.