Proposal: Use a dedicated data type for stock symbols instead of String

[vultix]

Proposal: Use a stack-allocated dedicated Symbol type such as stock-symbol.

Benefits:

• A dedicated type is more self-explanatory than passing around strings
• Should be much faster than doing many tiny heap allocated String symbols
• This will allow us to implement Copy, making many operations much simpler
• Can provide additional validation of the underlying strings

[vultix]

I'd be willing to make a pull request if this is the way we want to go

[d-e-s-o]

Thanks for bringing this up. Yeah, it probably makes sense to introduce such a type. But I'd suggest we define it ourselves instead of relying on a third-party crate such as stock-symbol. Could probably be as simple as a wrapper around [7; c_char] or something like that. Feel free to propose an implementation or prototype something.