A struct, enum, or error type belongs to the file (or module) that declares it – so inside one file, each type name can only be used once. Here’s the mistake:
struct Point { x: int, y: int }struct Point { x: double, y: double }// ERROR: A struct named 'Point' is already declared.Different files are a different story: if a module you import also declares a struct Config, that’s fine – it’s a separate type, thatmodule::Config, and your own Config stays yours. (If you import it by name, import thatmodule::Config;, a bare Config could mean either one – that’s a different error, E085, and Turf will name both.)
Turf will also point you to exactly where the first declaration of that name lives, so you can compare the two and decide what to do.
To fix it: rename one of the two declarations to something more specific.
Run turf --explain E034 in a terminal to read this again.