Resource

outgoing-value

A data is the data stored in a data blob. The value can be of any type that can be represented in a byte array. It provides a way to write the value to the output-stream defined in the wasi-io interface. Soon: switch to resource value { ... }

resource outgoing-value;

F outgoing-value-write-body

outgoing-value-write-body: func() -> result<output-stream, _>;

Returns a stream for writing the value contents.

The returned output-stream is a child resource: it must be dropped before the parent outgoing-value resource is dropped (or finished), otherwise the outgoing-value drop or finish will trap.

Returns success on the first call: the output-stream resource for this outgoing-value may be retrieved at most once. Subsequent calls will return error.

F new-outgoing-value

new-outgoing-value: func() -> outgoing-value;

F finish

finish: func(this: outgoing-value) -> result<_, error>;

Finalize an outgoing value. This must be called to signal that the outgoing value is complete. If the outgoing-value is dropped without calling outgoing-value.finalize, the implementation should treat the value as corrupted.