14: Add solutions for section "generics".

Dependencies

• [2] H6XH45OP 0

Change contents

• replacement in exercises/generics/generics3.rs at line 13
  [2.127937]→[2.127937:127999](∅→∅)
  − // I AM NOT DONE

  −

  − pub struct ReportCard {

  − pub grade: f32,
  [2.127937]

  [2.127999]
  + pub struct ReportCard<T> {

  + pub grade: T,
• replacement in exercises/generics/generics3.rs at line 19
  [2.128057]→[2.128057:128075](∅→∅)
  − impl ReportCard {
  [2.128057]

  [2.128075]
  + impl<T: std::fmt::Display> ReportCard<T> {
• replacement in exercises/generics/generics3.rs at line 47
  [2.128793]→[2.128793:128817](∅→∅)
  − grade: 2.1,
  [2.128793]

  [2.128817]
  + grade: "A+",
• replacement in exercises/generics/generics2.rs at line 6
  [2.129279]→[2.129279:129330](∅→∅)
  − // I AM NOT DONE

  −

  − struct Wrapper {

  − value: u32,
  [2.129279]

  [2.129330]
  + struct Wrapper<T> {

  + value: T,
• replacement in exercises/generics/generics2.rs at line 10
  [2.129333]→[2.129333:129385](∅→∅)
  − impl Wrapper {

  − pub fn new(value: u32) -> Self {
  [2.129333]

  [2.129385]
  + impl<T> Wrapper<T> {

  + pub fn new(value: T) -> Self {
• edit in exercises/generics/generics1.rs at line 5
  [2.129850]→[2.129850:129868](∅→∅)
  −

  − // I AM NOT DONE
• replacement in exercises/generics/generics1.rs at line 7
  [2.129881]→[2.129881:129929](∅→∅)
  − let mut shopping_list: Vec<?> = Vec::new();
  [2.129881]

  [2.129929]
  + let mut shopping_list: Vec<_> = Vec::new();