Processing a value through a global helper (middleware)

In the examples a funciton that is run on a view (or model) is usually its method. Would it be possible to implement a syntax which would allow to let a model property through a global function - like a helper, say: a function to format amount as currency.

So that if we have a model:

```
{
name: Lexus,
price: 81999,
}
```

we would run the price through a helper named `amountToCurrency(amount, format)` using a syntax along `{{ ^amountToCurrency(amount, '$0.00') }}`.

Is that feasible?