rust hello world

.github/workflows/readme_rust.yml

@@ -0,0 +1,26 @@
+name: readme_rust
+
+defaults:
+  run:
+    shell: bash
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  schedule:
+    - cron: '0 13 * * 4'
+
+jobs:
+  rust:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+      - uses: actions/setup-python@v1
+        with:
+          python-version: 3.9
+      - run: pip install -e .
+      - run: pip install pytest-codeblocks pytest
+      - run: python -c "import pytest_codeblocks; code=pytest_codeblocks.extract_from_file('README.md'); f=open('readme.rs', 'w'); f.writelines(block.code for block in code if block.syntax=='Rust'); f.close()"
+      - run: cargo run readme.rs

README.md

@@ -144,6 +144,14 @@ In most use cases of PyMPDATA, the first thing to do is to instantiate the
 [``Options``](https://open-atmos.github.io/PyMPDATA/PyMPDATA/options.html) class 
 with arguments suiting the problem at hand, e.g.:
 <details>
+<summary>Rust code</summary>
+```Rust
+fn main() {
+  writeln!("Hello world!");
+}
+```
+</details>
+<details>
 <summary>Julia code (click to expand)</summary>
 
 ```Julia