24 lines
803 B
Markdown
24 lines
803 B
Markdown
|
Special Support for OOP via Object Maps
|
||
|
|
======================================
|
||
|
|
|
||
|
|
{{#include ../links.md}}
|
||
|
|
|
||
|
|
[Object maps] can be used to simulate object-oriented programming ([OOP]) by storing data
|
||
|
|
as properties and methods as properties holding [function pointers].
|
||
|
|
|
||
|
|
If an [object map]'s property holding a [function pointer] is called in method-call style,
|
||
|
|
it calls the function referenced by the [function pointer].
|
||
|
|
|
||
|
|
```rust
|
||
|
|
fn do_action(x) { print(this + x); } // 'this' binds to the object when called
|
||
|
|
|
||
|
|
let obj = #{
|
||
|
|
data: 40,
|
||
|
|
action: Fn("do_action") // 'action' holds a function pointer to 'do_action'
|
||
|
|
};
|
||
|
|
|
||
|
|
obj.action(2); // prints 42
|
||
|
|
|
||
|
|
obj.action.call(2); // <- the above de-sugars to this
|
||
|
|
```
|