lochana-chathura

[Improvement]: Refactor `BUnionType`'s `getMemberTypes()` usages

12

### Description $subject. We need to get rid of `getMemberTypes()` and `getOriginalMemberTypes()` usages in the current compiler, in order to do #43343. This issue depends on #43126 which is in...

[Bug]: No error when `distinct` is used for an object and error type union

2

### Description $subject. ```bal type Y error|object {}; type X distinct Y; // This should give a compilation error. public function main() { X x = error("hi"); io:println(x); } ```...

`(1|2|3)[]` type in diagnostics is printed as `'1|2|3[]'` instead of `'(1|2|3)[]'`

13

**Description:** ```bal public function main() { (1|2|3)[] ar = 3; // incompatible types: expected '1|2|3[]', found 'int' } ``` As with type precedence, `'1|2|3|[]'` means `1|2|(3[])`. Correct error msg should...