Should a parser type be a struct or class?

[Stefan Koch]

On Wednesday, 17 June 2020 at 11:50:27 UTC, Per Nordlöw wrote:
> Should a range-compliant aggregate type realizing a parser be 
> encoded as a struct or class? In dmd `Lexer` and `Parser` are 
> both classes.
>
> In general how should I reason about whether an aggregate type 
> should be encoded as a struct or class?

I would say a struct.

Parser in dmd does even inherit from Lexer.
It seems to be a quirky design.

Especially for multi-threaded parsing you might want to have more 
control over memory layout than classes usually give you.