**Describe the issue**
```
SELECT x[1]::UInt64

Syntax error: failed at position 12 ('::')
```

Pos & pos, ASTPtr & expr, IntervalKind & interval_kind, Expected & expected)
{
    auto begin = pos;
    auto init_expected = expected;
    ASTPtr string_literal;
    
    
    
    if (ParserStringLiteral{}.parse(pos, string_literal, expected))