E0277E0277 — Type Does Not Implement Iterator
A type is used in a for loop or iterator context but does not implement Iterator.
E0424The self keyword is used outside of a method or associated function context.
You are using self in a function that is not a method (does not take &self, &mut self, or self as a parameter). Only impl block methods can use self.
Add self as a parameter if the function should be a method. Remove self usage if the function is a standalone function. Make the function an associated function within an impl block.
E0277A type is used in a for loop or iterator context but does not implement Iterator.
E0015A non-const function is called in a constant expression context.
E0405A trait name is used but not defined or imported in the current scope.
E0614The dereference operator (*) is used on a type that does not implement Deref.
E0515A function tries to return a reference to a value that is created inside the function.
E0308The function returns a Result with the wrong Ok or Err type.