IoError

IoError

Classifies portable output and byte-stream failures.

Sn is under heavy development. This reference includes the intended 1.0 design; features may be incomplete in the current compiler. Read the status →

Module std.io

import std.io;

Public declaration contracts and authored examples. A page can document several related symbols. Implementation bodies are excluded.

pub enum IoError

Classifies portable output and byte-stream failures.

OutputFailed preserves the original output identity. Failure carries a portable reason and already transferred byte prefix, never host errno. Counts are relative to the current operation, not cumulative stream position.

Example

module example.io_error;
from std.io import IoError, TryPrint;
fn Main() -> i32 {
    let ResultValue = TryPrint("ready");
    switch ResultValue {
        case .Ok => return 0;
        case .Err { Error = _ } => return 1;
    }
}

Documentation snapshot: October 24, 2026 About versions ↗