```cpp
here is some cpp code
```

```lang-cpp
some lang-cpp code
```

```language-cpp
and some language-cpp code
```

```nohighlight
some code without highlighting
```

That's using the *fenced-code-blocks* and *highlightjs-lang* extra.

Here is an empty one (just to check):

```cpp
```

Here is one at the end of the file:

```cpp
    is indentation maintained?
```