Rust

5953 readers

13 users here now

Welcome to the Rust community! This is a place to discuss about the Rust programming language.

Wormhole

[email protected]

Credits

The icon is a modified version of the official rust logo (changing the colors to a gradient and black background)

founded 1 year ago

MODERATORS

[email protected]

Questions about how to organize custom types / structs (programming.dev)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

14 comments fedilink hide all child comments

I'm wondering with my game project how best to handle types. I'm basically fetching all the rows in a particular table and creating a struct to represent that data. I then have like 5 or 6 sequential steps I'm trying to go through where I need to modify those initial values from the db.

My first thought was to have a base type called 'BaseArmy', then I needed to add new temporary properties that are not in the db and not represented in the original struct, so I decided to create a new struct 'Army'. The problem is I keep running into errors when passing converting from BaseArmy to Army. I tried writing a From impl, but it wasn't working (and I'm not even sure if it's the approach I should be taking).

So should I:

Have multiple different types to handle these kinds of cases
Have just one type somehow where I add properties to it? If so, how? I recently tried using Options for the fields that are not initially available, and that seems to be working but it feels weird.

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 2 points 1 year ago

Yeah, you can't pass one type when the function expects another type. You have either use generics and trait bounds or provide the exact type that a function expects..