Can we expect 'switch' operator rework?

I hope Dart devs will add range of values and range checking in switch/case operators - check if value is in range, check array elements, check multiple variables with same switch operator.

For example:

```
int i=27;
switch (i) {
case 1..30:
break;
default:
}

List a=[1,5,7,14,25,30];
switch (a) {
case a.contains(5):
break;
case a[1..4]>0:
break;
}

switch ([a,i] /*(or just a,i)*/ ) {
case i==5:
case a[1..4]>0:
break;
case a[i] !=0:
break;
}
```

Start by reviewing the proposed switch examples and the requested capabilities: value ranges, range checks, collection checks, and matching multiple variables. The issue names no files or tests, so research would need to identify the relevant Dart language specification area and establish which syntax and semantics are acceptable before implementation; done means a decided, specified language change.

Written by the indexing model from the issue text.