std.io.error

IoErrorKind enum

pub enum IoErrorKind

What went wrong, as a matchable name. Other carries everything the platform reports that has no name here — a locked file, a full disk — and the detail string still says it. Only kinds every platform can CLASSIFY reliably get a name; the carrier-plus-kind shape is what lets this list grow later without breaking anyone's match.

NotFound

PermissionDenied

InvalidPath

Other

ConnectionRefused

The peer answered "no" — nothing listens there (4.0, with std.io.net).

AddressInUse

The local address is already taken (4.0, with std.io.net).

stdlib/std/io/error.lyr:18

IoError class

pub class IoError :: [Throwable]

The reason an I/O operation failed: which kind, on which path, and what the platform said.

§9.0's answer to "why not?" — the silent forms (text, writeText, …) answer only whether.

kind: IoErrorKind

path: string

detail: string

pub fn message(): string

stdlib/std/io/error.lyr:32