Module pros_core::io

Std-like I/O macros and types for use in pros.

Implements println!, eprintln! and dbg! on top of the pros_sys crate without requiring the use of an allocator. (Modified version of libc_print crate)

Allows you to use these macros in a #![no_std] context, or in a situation where the traditional Rust streams might not be available (ie: at process shutdown time).

Usage

Exactly as you’d use println!, eprintln! and dbg!.

// Use the default ``-prefixed macros:
println!("Hello {}!", "stdout");
eprintln!("Hello {}!", "stderr");
let a = 2;
let b = dbg!(a * 2) + 1;
assert_eq!(b, 5);

Or you can import aliases to std names:

use pros::io::{println, eprintln, dbg};

println!("Hello {}!", "stdout");
eprintln!("Hello {}!", "stderr");
let a = 2;
let b = dbg!(a * 2) + 1;
assert_eq!(b, 5);

Macros

• dbg
  Prints and returns the value of a given expression for quick and dirty debugging.
• eprint
  Macro for printing to the standard error.
• eprintln
  Macro for printing to the standard error, with a newline.
• print
  Macro for printing to the standard output.
• println
  Macro for printing to the standard output, with a newline.

Structs

• Bytes
  An iterator over u8 values of a reader.
• Chain
  Adaptor to chain together two readers.
• Cursor
  A Cursor wraps an in-memory buffer and provides it with a Seek implementation.
• Error
  The error type for I/O operations of the Read, Write, Seek, and associated traits.
• Take
  Reader adaptor which limits the bytes read from an underlying reader.

Enums

• ErrorKind
  A list specifying general categories of I/O error.
• SeekFrom
  Enumeration of possible methods to seek within an I/O object.

Traits

• BufRead
  A BufRead is a type of Reader which has an internal buffer, allowing it to perform extra ways of reading.
• Read
  The Read trait allows for reading bytes from a source.
• Seek
  The Seek trait provides a cursor which can be moved within a stream of bytes.
• Write
  A trait for objects which are byte-oriented sinks.

Type Aliases

• Result
  A specialized Result type for I/O operations.