Bug 22152 – Block statement at beginning of statement not recognized as function literal

```d void main() { import std; {writeln("hello world");}(); } ``` Compilation attempt result: ``` app.d(3): Error: expression expected, not `)` app.d(3): Error: found `;` when expecting `)` app.d(4): Error: found `}` when expecting `;` following statement app.d(5): Error: found `End of File` when expecting `}` following compound statement ``` The compiler should recognize the block statement as a function literal that is immediately called. Note that it will compile with this change: ```d void main() { import std; return {writeln("hello world");}(); } ```

*** This issue has been marked as a duplicate of issue 21619 ***