You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: field_reassign_with_default.rs
    path of file: ./repos/rust-clippy/tests/ui
    
    the code of the file until where you have to start completion: //@aux-build:proc_macro_derive.rs
//@aux-build:proc_macros.rs

#![warn(clippy::field_reassign_with_default)]
#![allow(clippy::assigning_clones)]

#[macro_use]
extern crate proc_macro_derive;
extern crate proc_macros;
use proc_macros::{external, inline_macros};

// Don't lint on derives that derive `Default`
// See https://github.com/rust-lang/rust-clippy/issues/6545
#[derive(FieldReassignWithDefault)]
struct DerivedStruct;

#[derive(Default)]
struct A {
    i: i32,
    j: i64,
}

struct B {
    i: i32,
    j: i64,
}

#[derive(Default)]
struct C {
    i: Vec<i32>,
    j: i64,
}

#[derive(Default)]
struct D {
    a: Option<i32>,
    b: Option<i32>,
}

/// Implements .next() that returns a different number each time.
struct SideEffect(i32);

impl SideEffect {
    fn new() -> SideEffect {
        SideEffect(0)
    }
    fn next(&mut self) -> i32 {
        self.0 += 1;
        self.0
    }
}

#[inline_macros]
fn main() {
    // wrong, produces first error in stderr
    let mut a: A = Default::default();
    a.i = 42;

    // right
    let mut a: A = Default::default();

    // right
    let a = A {
        i: 42,
        ..Default::default()
    };

    // right
    let mut a: A = Default::default();
    if a.i == 0 {
        a.j = 12;
    }

    // right
    let mut a: A = Default::default();
    let b = 5;

    // right
    let mut b = 32;
    let mut a: A = Default::default();
    b = 2;

    // right
    let b: B = B { i: 42, j: 24 };

    // right
    let mut b: B = B { i: 42, j: 24 };
    b.i = 52;

    // right
    let mut b = B { i: 15, j: 16 };
    let mut a: A = Default::default();
    b.i = 2;

    // wrong, produces second error in stderr
    let mut a: A = Default::default();
    a.j = 43;
    a.i = 42;

    // wrong, produces third error in stderr
    let mut a: A = Default::default();
    a.i = 42;
    a.j = 43;
    a.j = 44;

    // wrong, produces fourth error in stderr
    let mut a = A::default();
    a.i = 42;

    // wrong, but does not produce an error in stderr, because we can't produce a correct kind of
    // suggestion with current implementation
    let mut c: (i32, i32) = Default::default();
    c.0 = 42;
    c.1 = 21;

    // wrong, produces the fifth error in stderr
    let mut a: A = Default::default();
    a.i = Default::default();

    // wrong, produces the sixth error in stderr
    l
    
fn main() {
    // wrong, produces first error in stderr
    let mut a: A = Default::default();
    a.i = 42;

    // right
    let mut a: A = Default::default();

    // right
    let a = A {
        i: 42,
        ..Default::default()
    };

    // right
    let mut a: A = Default::default();
    if a.i == 0 {
        a.j = 12;
    }

    // right
    let mut a: A = Default::default();
    let b = 5;

    // right
    let mut b = 32;
    let mut a: A = Default::default();
    b = 2;

    // right
    let b: B = B { i: 42, j: 24 };

    // right
    let mut b: B = B { i: 42, j: 24 };
    b.i = 52;

    // right
    let mut b = B { i: 15, j: 16 };
    let mut a: A = Default::default();
    b.i = 2;

    // wrong, produces second error in stderr
    let mut a: A = Default::default();
    a.j = 43;
    a.i = 42;

    // wrong, produces third error in stderr
    let mut a: A = Default::default();
    a.i = 42;
    a.j = 43;
    a.j = 44;

    // wrong, produces fourth error in stderr
    let mut a = A::default();
    a.i = 42;

    // wrong, but does not produce an error in stderr, because we can't produce a correct kind of
    // suggestion with current implementation
    let mut c: (i32, i32) = Default::default();
    c.0 = 42;
    c.1 = 21;

    // wrong, produces the fifth error in stderr
    let mut a: A = Default::default();
    a.i = Default::default();

    // wrong, produces the sixth error in stderr
    let mut a: A = Default::default();
    a.i = Default::default();
    a.j = 45;

    // right, because an assignment refers to another field
    let mut x = A::default();
    x.i = 42;
    x.j = 21 + x.i as i64;

    // right, we bail out if there's a reassignment to the same variable, since there is a risk of
    // side-effects affecting the outcome
    let mut x = A::default();
    let mut side_effect = SideEffect::new();
    x.i = side_effect.next();
    x.j = 2;
    x.i = side_effect.next();

    // don't lint - some private fields
    let mut x = m::F::default();
    x.a = 1;

    // don't expand macros in the suggestion (#6522)
    let mut a: C = C::default();
    a.i = vec![1];

    // Don't lint in external macros
    external! {
        #[derive(Default)]
        struct A {
            pub i: i32,
            pub j: i64,
        }
        fn lint() {
            let mut a: A = Default::default();
            a.i = 42;
            a;
        }
    }

    // be sure suggestion is correct with generics
    let mut a: Wrapper<bool> = Default::default();
    a.i = true;

    let mut a: WrapperMulti<i32, i64> = Default::default();
    a.i = 42;

    // Don't lint in macros
    inline!(
        let mut data = $crate::D::default();
        data.$a = Some($42);
        data
    );
}