Raw `Engine`
===========

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`Engine::new` creates a scripting [`Engine`] with common functionalities (e.g. printing to the console via `print`).

In many controlled embedded environments, however, these may not be needed and unnecessarily occupy
application code storage space.

Use `Engine::new_raw` to create a _raw_ `Engine`, in which only a minimal set of
basic arithmetic and logical operators are supported (see below).

To add more functionalities to a _raw_ `Engine`, load [packages] into it.


Built-in Operators
------------------

| Operators                 | Assignment operators         | Supported for types (see [standard types])                                    |
| ------------------------- | ---------------------------- | ----------------------------------------------------------------------------- |
| `+`,                      | `+=`                         | `INT`, `FLOAT` (if not [`no_float`]), `char`, `ImmutableString`               |
| `-`, `*`, `/`, `%`, `~`,  | `-=`, `*=`, `/=`, `%=`, `~=` | `INT`, `FLOAT` (if not [`no_float`])                                          |
| `<<`, `>>`                | `<<=`, `>>=`                 | `INT`                                                                         |
| `&`, <code>\|</code>, `^` | `&=`, <code>\|=</code>, `^=` | `INT`, `bool`                                                                 |
| `&&`, <code>\|\|</code>   |                              | `bool`                                                                        |
| `==`, `!=`                |                              | `INT`, `FLOAT` (if not [`no_float`]), `bool`, `char`, `()`, `ImmutableString` |
| `>`, `>=`, `<`, `<=`      |                              | `INT`, `FLOAT` (if not [`no_float`]), `char`, `()`, `ImmutableString`         |