src/tools/clippy/tests/ui/extend_with_drain.fixed

   1 #![warn(clippy::extend_with_drain)]
   2 #![allow(clippy::iter_with_drain)]
   3 use std::collections::BinaryHeap;
   4 fn main() {
   5     //gets linted
   6     let mut vec1 = vec![0u8; 1024];
   7     let mut vec2: std::vec::Vec<u8> = Vec::new();
   8     vec2.append(&mut vec1);
   9
  10     let mut vec3 = vec![0u8; 1024];
  11     let mut vec4: std::vec::Vec<u8> = Vec::new();
  12
  13     vec4.append(&mut vec3);
  14
  15     let mut vec11: std::vec::Vec<u8> = Vec::new();
  16
  17     vec11.append(&mut return_vector());
  18
  19     //won't get linted it doesn't move the entire content of a vec into another
  20     let mut test1 = vec![0u8, 10];
  21     let mut test2: std::vec::Vec<u8> = Vec::new();
  22
  23     test2.extend(test1.drain(4..10));
  24
  25     let mut vec3 = vec![0u8; 104];
  26     let mut vec7: std::vec::Vec<u8> = Vec::new();
  27
  28     vec3.append(&mut vec7);
  29
  30     let mut vec5 = vec![0u8; 1024];
  31     let mut vec6: std::vec::Vec<u8> = Vec::new();
  32
  33     vec5.extend(vec6.drain(..4));
  34
  35     let mut vec9: std::vec::Vec<u8> = Vec::new();
  36
  37     return_vector().append(&mut vec9);
  38
  39     //won't get linted because it is not a vec
  40
  41     let mut heap = BinaryHeap::from(vec![1, 3]);
  42     let mut heap2 = BinaryHeap::from(vec![]);
  43     heap2.extend(heap.drain());
  44
  45     let mut x = vec![0, 1, 2, 3, 5];
  46     let ref_x = &mut x;
  47     let mut y = Vec::new();
  48     y.append(ref_x);
  49 }
  50
  51 fn return_vector() -> Vec<u8> {
  52     let mut new_vector = vec![];
  53
  54     for i in 1..10 {
  55         new_vector.push(i)
  56     }
  57
  58     new_vector
  59 }