Crate anstream

Auto-adapting stdout / stderr streams

A portmanteau of “ansi stream”

AutoStream always accepts ANSI escape codes, adapting to the user’s terminal’s capabilities.

Benefits

• Allows the caller to not be concerned with the terminal’s capabilities
• Semver safe way of passing styled text between crates as ANSI escape codes offer more compatibility than most crate APIs.

Available styling crates:

• anstyle for minimal runtime styling, designed to go in public APIs (once it hits 1.0)
• owo-colors for feature-rich runtime styling
• color-print for feature-rich compile-time styling

Example

use anstream::println;
use owo_colors::OwoColorize as _;

// Foreground colors
println!("My number is {:#x}!", 10.green());
// Background colors
println!("My number is not {}!", 4.on_red());

And this will correctly handle piping to a file, etc

Modules

• adapter
  Gracefully degrade styled output

Macros

• eprint
  Prints to stderr.
• eprintln
  Prints to stderr, with a newline.
• panic
  Panics the current thread.
• print
  Prints to stdout.
• println
  Prints to stdout, with a newline.

Structs

• AutoStream
  std::io::Write that adapts ANSI escape codes to the underlying Writes capabilities
• Buffer
  In-memory RawStream
• StripStream
  Only pass printable data to the inner Write

Enums

• ColorChoice
  Selection for overriding color output Selection for overriding color output

Traits

• Lockable
  Explicitly lock a std::io::Writeable
• RawStream
  Required functionality for underlying std::io::Write for adaptation

Functions

• stderr
  Create an ANSI escape code compatible stderr
• stdout
  Create an ANSI escape code compatible stdout