# tunnel of T

A typed channel for sending and receiving values between pieces of work.

Last updated: 2026-09-09

Package: language.types | Status: documented

Tags: containers-and-handles, cpu, language, type, yeho

A focused reference with a complete example. Numeric widths and experimental types still depend on the selected backend.

```yh
tunnel of T
```


## Complete tunnels example

Use a tunnel when producers and consumers should communicate without sharing an unbounded mutable queue.

Verification: type checked

```yh
tunnel of text messages
messages.Send("Player joined")
text message = messages.Receive()
Console.Log(message)

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.language__tunnels"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/type--tunnel-of-T-5818c6/complete --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```




Source: demonhunterlabs/app/lib/yeho-language-reference.ts

AI training permission: https://demonhunterlabs.com/ai-use