Crate std

Modules

alloc

Memory allocation APIs.

any

Utilities for dynamic typing or type reflection.

arch

SIMD and vendor intrinsics module.

array

Utilities for the array primitive type.

ascii

Operations on ASCII strings and characters.

backtrace

Support for capturing a stack backtrace of an OS thread

borrow

A module for working with borrowed data.

boxed

The Box<T> type for heap allocation.

cell

Shareable mutable containers.

char

Utilities for the char primitive type.

clone

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

cmp

Utilities for comparing and ordering values.

collections

Collection types.

convert

Traits for conversions between types.

default

The Default trait for types with a default value.

env

Inspection and manipulation of the process’s environment.

error

Interfaces for working with Errors.

f32

Constants for the f32 single-precision floating point type.

f64

Constants for the f64 double-precision floating point type.

ffi

Utilities related to FFI bindings.

fmt

Utilities for formatting and printing Strings.

fs

Filesystem manipulation operations.

future

Asynchronous basic functionality.

hash

Generic hashing support.

hint

Hints to compiler that affects how code should be emitted or optimized.

i8Deprecation planned

Redundant constants module for the i8 primitive type.

i16Deprecation planned

Redundant constants module for the i16 primitive type.

i32Deprecation planned

Redundant constants module for the i32 primitive type.

i64Deprecation planned

Redundant constants module for the i64 primitive type.

i128Deprecation planned

Redundant constants module for the i128 primitive type.

io

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

isizeDeprecation planned

Redundant constants module for the isize primitive type.

iter

Composable external iteration.

marker

Primitive traits and types representing basic properties of types.

mem

Basic functions for dealing with memory.

net

Networking primitives for TCP/UDP communication.

num

Additional functionality for numerics.

ops

Overloadable operators.

option

Optional values.

os

OS-specific functionality.

panic

Panic support in the standard library.

path

Cross-platform path manipulation.

pin

Types that pin data to a location in memory.

prelude

The Rust Prelude

primitive

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

process

A module for working with processes.

ptr

Manually manage memory through raw pointers.

rc

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

result

Error handling with the Result type.

slice

Utilities for the slice primitive type.

str

Utilities for the str primitive type.

string

A UTF-8–encoded, growable string.

sync

Useful synchronization primitives.

task

Types and Traits for working with asynchronous tasks.

thread

Native threads.

time

Temporal quantification.

u8Deprecation planned

Redundant constants module for the u8 primitive type.

u16Deprecation planned

Redundant constants module for the u16 primitive type.

u32Deprecation planned

Redundant constants module for the u32 primitive type.

u64Deprecation planned

Redundant constants module for the u64 primitive type.

u128Deprecation planned

Redundant constants module for the u128 primitive type.

usizeDeprecation planned

Redundant constants module for the usize primitive type.

vec

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

assert_matchesExperimental

Unstable module containing the unstable assert_matches macro.

async_iterExperimental

Composable asynchronous iteration.

autodiffExperimental

This module provides support for automatic differentiation.

bstrExperimental

The ByteStr and ByteString types and trait implementations.

f16Experimental

Constants for the f16 half-precision floating point type.

f128Experimental

Constants for the f128 quadruple-precision floating point type.

intrinsicsExperimental

Compiler intrinsics.

patExperimental

Helper module for exporting the pattern_type macro

randomExperimental

Random value generation.

rangeExperimental

Experimental replacement range types

simdExperimental

Portable SIMD module.

unsafe_binderExperimental

Operators used to turn types into unsafe binders and back.

Macros

assert

Asserts that a boolean expression is true at runtime.

assert_eq

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

assert_ne

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

cfg

Evaluates boolean combinations of configuration flags at compile-time.

column

Expands to the column number at which it was invoked.

compile_error

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

concat

Concatenates literals into a static string slice.

dbg

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

debug_assert

Asserts that a boolean expression is true at runtime.

debug_assert_eq

Asserts that two expressions are equal to each other.

debug_assert_ne

Asserts that two expressions are not equal to each other.

env

Inspects an environment variable at compile time.

eprint

Prints to the standard error.

eprintln

Prints to the standard error, with a newline.

file

Expands to the file name in which it was invoked.

format

Creates a String using interpolation of runtime expressions.

format_args

Constructs parameters for the other string-formatting macros.

include

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

include_bytes

Includes a file as a reference to a byte array.

include_str

Includes a UTF-8 encoded file as a string.

is_x86_feature_detected

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

line

Expands to the line number on which it was invoked.

matches

Returns whether the given expression matches the provided pattern.

module_path

Expands to a string that represents the current module path.

option_env

Optionally inspects an environment variable at compile time.

panic

Panics the current thread.

print

Prints to the standard output.

println

Prints to the standard output, with a newline.

stringify

Stringifies its arguments.

thread_local

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

todo

Indicates unfinished code.

tryDeprecated

Unwraps a result or propagates its error.

unimplemented

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

unreachable

Indicates unreachable code.

vec

Creates a Vec containing the arguments.

write

Writes formatted data into a buffer.

writeln

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

cfg_selectExperimental

A macro for defining #[cfg] match-like statements.

concat_bytesExperimental

Concatenates literals into a byte slice.

concat_identsDeprecatedExperimental

Concatenates identifiers into one identifier.

const_format_argsExperimental

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

format_args_nlExperimental

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

log_syntaxExperimental

Prints passed tokens into the standard output.

trace_macrosExperimental

Enables or disables tracing functionality used for debugging other macros.