Writer
Defines a structural safe mutable byte-stream operation. Accepts caller-owned bytes; flush propagates accepted bytes downstream. Successful/failed transfer counts may not exceed the supplied byte view. Implementations document blocking, retention and cancellation; the concept introduces no box, allocation, global stream or implicit event loop.
Module std.io
import std.io;Public declaration contracts and authored examples. A page can document several related symbols. Implementation bodies are excluded.
Writer
pub concept Writer<Self>Defines a structural safe mutable byte-stream operation. Accepts caller-owned bytes; flush propagates accepted bytes downstream. Successful/failed transfer counts may not exceed the supplied byte view. Implementations document blocking, retention and cancellation; the concept introduces no box, allocation, global stream or implicit event loop. Self: Concrete mutable stream state.
Writer.Write
requires fn Write(Input: readonly byte[]) -> Result<usize, IoError>;Starts a safe bounded byte transfer. Input: Borrowed readonly input slice; backing must remain valid through completion. Return: accepted/transferred byte count or portable failure with partial prefix.
Writer.Flush
requires fn Flush() -> Result<void, IoError>;Propagates accepted bytes through downstream layers without durability promise. Return: complete propagation or portable failure.