# Lists

A list is zero or more comma separated items that are not enclosed by
parentheses (which would make it a sequence).

```{warning}
Some list macros may be limited to 30 items.
```

```{doxygendefine} CORE_PP_HEAD
```

```{doxygendefine} CORE_PP_REST
```

```{doxygendefine} CORE_PP_SECOND
```

```{doxygendefine} CORE_PP_THIRD
```

```{doxygendefine} CORE_PP_CAT
```

```{doxygendefine} CORE_PP_CATN
```

```{doxygendefine} CORE_PP_COUNT
```