제네릭 공부중

exercises/error_handling/errors5.rs

@@ -3,15 +3,14 @@
 // This program uses a completed version of the code from errors4.
 // It won't compile right now! Why?
 // Execute `rustlings hint errors5` for hints!
-
-// I AM NOT DONE
+//못품 일단 넘기기
 
 use std::error;
 use std::fmt;
 use std::num::ParseIntError;
 
 // TODO: update the return type of `main()` to make this compile.
-fn main() -> Result<(), (ParseIntError,CreationError)> {
+fn main() -> Result<(),ParseIntError> {
     let pretend_user_input = "42";
     let x: i64 = pretend_user_input.parse()?;
     println!("output={:?}", PositiveNonzeroInteger::new(x)?);

exercises/error_handling/errors6.rs

@@ -8,7 +8,7 @@
 
 // Make these tests pass! Execute `rustlings hint errors6` for hints :)
 
-// I AM NOT DONE
+// 일단 넘김 패스
 
 use std::num::ParseIntError;
 

exercises/generics/generics1.rs

@@ -3,9 +3,8 @@
 
 // Execute `rustlings hint generics1` for hints!
 
-// I AM NOT DONE
 
 fn main() {
-    let mut shopping_list: Vec<?> = Vec::new();
+    let mut shopping_list: Vec<&str> = Vec::new();
     shopping_list.push("milk");
 }

exercises/generics/generics2.rs

@@ -3,14 +3,13 @@
 
 // Execute `rustlings hint generics2` for hints!
 
-// I AM NOT DONE
 
-struct Wrapper {
-    value: u32,
+struct Wrapper<T> {
+    value: T,
 }
 
-impl Wrapper {
-    pub fn new(value: u32) -> Self {
+impl<T> Wrapper<T> {
+    pub fn new (value: T) -> Self {
         Wrapper { value }
     }
 }