# Stack & Queue

> ⚠️ **Experimental — generated with no human supervision.** This realm was
> produced automatically by an MCP-driven agent to exercise the gno MCP server
> and tooling, and to generate test content for gno compilers, linters and
> formatters. **Not audited. Not for production.** Full context & folder README:
> [r/moul/x/daily](https://github.com/moul/gno-contracts/blob/main/r/moul/x/daily/README.md)

---


An educational data-structure playground that maintains BOTH a LIFO **stack**
and a FIFO **queue** of ints side by side. Push/Pop the stack, Enqueue/Dequeue
the queue, and `Render` shows both structures with the top/front element
labeled, their sizes, and a one-line reminder of how LIFO differs from FIFO.
Popping or dequeuing an empty structure panics (a cross-realm abort).

Realm path: `gno.land/r/REPLACE_ADDR/stack`

## Example calls

```
# Stack (LIFO)
Push 1
Push 2
Push 3
Pop        # -> 3
Pop        # -> 2

# Queue (FIFO)
Enqueue 1
Enqueue 2
Enqueue 3
Dequeue    # -> 1
Dequeue    # -> 2
```

Via `gnokey`:

```sh
gnokey maketx call -pkgpath "gno.land/r/REPLACE_ADDR/stack" -func Push     -args 42 ...
gnokey maketx call -pkgpath "gno.land/r/REPLACE_ADDR/stack" -func Pop      ...
gnokey maketx call -pkgpath "gno.land/r/REPLACE_ADDR/stack" -func Enqueue  -args 42 ...
gnokey maketx call -pkgpath "gno.land/r/REPLACE_ADDR/stack" -func Dequeue  ...
```

Read the live view with `Render` (e.g. via `gnokey query vm/qrender`).

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---

Part of **[moul/gno-contracts](https://github.com/moul/gno-contracts)** — moul's versioned gno.land contracts. See the repository for the full catalog, build/test tooling, and usage.

> 🧪 **Highly experimental — potentially vibe-coded.** Not audited; may break, change, or be removed at any time. Do not use with anything of value. Full disclaimer: [DISCLAIMER](https://github.com/moul/gno-contracts/blob/main/DISCLAIMER.md).

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