Crate async_std

[−] Expand description

Async version of the Rust standard library.

Modules in this crate are organized in the same way as in the standard library, except blocking functions have been replaced with async functions and threads have been replaced with lightweight tasks.

More information, reading materials, and other resources:

• 🌐 The async-std website
• 📖 The async-std book
• 🐙 GitHub repository
• 📒 List of code examples
• 💬 Discord chat

Examples

Spawn a task and block the current thread on its result:

use async_std::task;

fn main() {
    task::block_on(async {
        println!("Hello, world!");
    })
}

Features

Items marked with unstable are available only when the unstable Cargo feature is enabled:

[dependencies.async-std]
version = "0.99"
features = ["unstable"]

Modules

fs	Filesystem manipulation operations.
future	Asynchronous values.
io	Traits, helpers, and type definitions for core I/O functionality.
net	Networking primitives for TCP/UDP communication.
os	OS-specific extensions.
path	Cross-platform path manipulation.
pin	unstable Types that pin data to its location in memory.
prelude	The async prelude.
process	unstable A module for working with processes.
stream	Composable asynchronous iteration.
sync	Synchronization primitives.
task	Types and traits for working with asynchronous tasks.

Macros

eprint	unstable Prints to the standard error.
eprintln	unstable Prints to the standard error, with a newline.
print	unstable Prints to the standard output.
println	unstable Prints to the standard output, with a newline.
task_local	Declares task-local values.
write	unstable Writes formatted data into a buffer.
writeln	unstable Write formatted data into a buffer, with a newline appended.