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Sn50SnThe SnAPI programming language
Snapshot · Oct 24, 2026 · Frozen documentation

AsyncWriter

Defines a structural safe mutable byte-stream operation. Writes asynchronously while source/input loans remain live through completion. 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.

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.

AsyncWriter

pub concept AsyncWriter<Self>

Defines a structural safe mutable byte-stream operation. Writes asynchronously while source/input loans remain live through completion. 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.

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