[Issue 24229] New: Parser accepts basic type as primary expression without dot identifier

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24229

          Issue ID: 24229
           Summary: Parser accepts basic type as primary expression
                    without dot identifier
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: accepts-invalid
          Severity: minor
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: b2.temp at gmx.com

The rule for having a type like int, char, etc. as expression is, according to
https://dlang.org/spec/expression.html#primary_expressions

```ebnf
FundamentalType "." Identifier
```

so the following code should not parse

```d
ubyte[] v()
{
    ubyte[] buffer;
    buffer ~= char; // here the rhs
    return buffer;
}

enum ubyte a = v()[0];       
```

but instead it does and ends up with a semantic-time error.

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