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Accepted
Nicolas Cavilla
Asked: 2020-10-03 09:59:34 +0800 CST 2020-10-03 09:59:34 +0800 CST

Error: a struct with a similar name exists - Rust

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I'm just starting out with Rust and trying to program a list with pure pointers.

The code I have so far is the following:

struct Lista<T>{
    root: *mut NodoLista<T>,
    nodos: u32,
}

pub struct NodoLista<T>{
    pub value: T,
    pub child: *mut NodeLista<T>,
}

impl<T> NodoLista<T>{
    
    fn new(value:T)->NodoLista<T>{
        NodoLista::<T>{value, child:None}
    }

}

impl<T> Lista<T>{

    fn new(){
        Lista::<T>{root:None, nodos: 0};
    }

    fn len(self)->u32{
        return self.nodos;
    }
        
}

fn main(){

    let lista = Lista::new();

    println!("Tamaño de la lista {}", lista.len());

}

When compiling it returns the following error:

error[E0412]: cannot find type 'NodeLista' in this scope

help: a struct with a similar name exists: 'NodoLista'

How could I solve that problem?

rust

1 Answers

  1. Best Answer

    By changing NodeListato NodoLista, the compiler is telling you that it NodeListaDOESN'T EXIST and suggesting that you use the name of the structure that you already defined . You NodoLista are using it NodeListaas the type of the second field of the same structure. I also recommend using Option<Box<_>>you don't have to use that much unsafeand the compiler will optimize it to a pointer (even std::mem::size_of will tell you that its size is the same as a pure pointer)

    If you insist on pointers then you might be interested in NonNull .

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