1.6.0[][src]Crate core

The Rust Core Library

The Rust Core Library is the dependency-free1 foundation of The Rust Standard Library. It is the portable glue between the language and its libraries, defining the intrinsic and primitive building blocks of all Rust code. It links to no upstream libraries, no system libraries, and no libc.

The core library is minimal: it isn't even aware of heap allocation, nor does it provide concurrency or I/O. These things require platform integration, and this library is platform-agnostic.

How to use the core library

Please note that all of these details are currently not considered stable.

This library is built on the assumption of a few existing symbols:


  1. Strictly speaking, there are some symbols which are needed but they aren't always necessary. 

Modules

alloc

Memory allocation APIs

any

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

arch

SIMD and vendor intrinsics module.

array

Implementations of things like Eq for fixed-length arrays up to a certain length. Eventually we should able to generalize to all lengths.

ascii

Operations on ASCII strings and characters.

borrow

A module for working with borrowed data.

cell

Shareable mutable containers.

char

A character type.

clone

The Clone trait for types that cannot be 'implicitly copied'.

cmp

Functionality for ordering and comparison.

convert

Traits for conversions between types.

default

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

f32

This module provides constants which are specific to the implementation of the f32 floating point data type.

f64

This module provides constants which are specific to the implementation of the f64 floating point data type.

ffi

Utilities related to FFI bindings.

fmt

Utilities for formatting and printing strings.

hash

Generic hashing support.

hint

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

i8

The 8-bit signed integer type.

i16

The 16-bit signed integer type.

i32

The 32-bit signed integer type.

i64

The 64-bit signed integer type.

i128

The 128-bit signed integer type.

isize

The pointer-sized signed integer type.

iter

Composable external iteration.

marker

Primitive traits and types representing basic properties of types.

mem

Basic functions for dealing with memory.

num

Numeric traits and functions for the built-in numeric types.

ops

Overloadable operators.

option

Optional values.

pin

Types that pin data to its location in memory.

prelude

The libcore prelude

ptr

Manually manage memory through raw pointers.

result

Error handling with the Result type.

slice

Slice management and manipulation.

str

String manipulation.

sync

Synchronization primitives

time

Temporal quantification.

u8

The 8-bit unsigned integer type.

u16

The 16-bit unsigned integer type.

u32

The 32-bit unsigned integer type.

u64

The 64-bit unsigned integer type.

u128

The 128-bit unsigned integer type.

usize

The pointer-sized unsigned integer type.

futureExperimental

Asynchronous values.

intrinsicsExperimental

Compiler intrinsics.

panicExperimental

Panic support in the standard library.

panickingExperimental

Panic support for libcore

rawExperimental

Contains struct definitions for the layout of compiler built-in types.

taskExperimental

Types and Traits for working with asynchronous tasks.

unicodeExperimental

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 on 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.

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.

file

Expands to the file name from which it was invoked.

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 utf8-encoded file as a string.

line

Expands to the line number on which it was invoked.

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.

stringify

Stringifies its arguments.

try

Unwraps a result or propagates its error.

unimplemented

Indicates unfinished code.

unreachable

Indicates unreachable code.

write

Writes formatted data into a buffer.

writeln

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

concat_identsExperimental

Concatenates identifiers into one identifier.

todoExperimental

Indicates unfinished code.

uninitialized_arrayExperimental

Creates an array of MaybeUninit.