X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/83e8dbfff2a6fdce785af58dbb13f007c4234cf2..ab7f9b241429bd675b437d2437799de75d2f409b:/workspace/src/part05.rs

diff --git a/workspace/src/part05.rs b/workspace/src/part05.rs
deleted file mode 100644
index 65f6f7d..0000000
--- a/workspace/src/part05.rs
+++ /dev/null
@@ -1,80 +0,0 @@
-// Rust-101, Part 05: Clone
-// ========================
-
-// ## Big Numbers
-
-pub struct BigInt {
-    pub data: Vec<u64>, // least significant digit first, no trailing zeros
-}
-
-// Now that we fixed the data representation, we can start implementing methods on it.
-impl BigInt {
-    pub fn new(x: u64) -> Self {
-        if x == 0 {
-            unimplemented!()
-        } else {
-            unimplemented!()
-        }
-    }
-
-    pub fn test_invariant(&self) -> bool {
-        if self.data.len() == 0 {
-            true
-        } else {
-            unimplemented!()
-        }
-    }
-
-    // We can convert any vector of digits into a number, by removing trailing zeros. The `mut`
-    // declaration for `v` here is just like the one in `let mut ...`: We completely own `v`, but Rust
-    // still asks us to make our intention of modifying it explicit. This `mut` is *not* part of the
-    // type of `from_vec` - the caller has to give up ownership of `v` anyway, so they don't care anymore
-    // what you do to it.
-    // 
-    // **Exercise 05.1**: Implement this function.
-    // 
-    // *Hint*: You can use `pop` to remove the last element of a vector.
-    pub fn from_vec(mut v: Vec<u64>) -> Self {
-        unimplemented!()
-    }
-}
-
-// ## Cloning
-fn clone_demo() {
-    let v = vec![0,1 << 16];
-    let b1 = BigInt::from_vec((&v).clone());
-    let b2 = BigInt::from_vec(v);
-}
-
-impl Clone for BigInt {
-    fn clone(&self) -> Self {
-        unimplemented!()
-    }
-}
-
-// We can also make the type `SomethingOrNothing<T>` implement `Clone`. 
-use part02::{SomethingOrNothing,Something,Nothing};
-impl<T: Clone> Clone for SomethingOrNothing<T> {
-    fn clone(&self) -> Self {
-        unimplemented!()
-    }
-}
-
-// **Exercise 05.2**: Write some more functions on `BigInt`. What about a function that returns the number of
-// digits? The number of non-zero digits? The smallest/largest digit? Of course, these should all just borrow `self`.
-
-// ## Mutation + aliasing considered harmful (part 2)
-enum Variant {
-    Number(i32),
-    Text(String),
-}
-fn work_on_variant(mut var: Variant, text: String) {
-    let mut ptr: &mut i32;
-    match var {
-        Variant::Number(ref mut n) => ptr = n,
-        Variant::Text(_) => return,
-    }
-    /* var = Variant::Text(text); */                                /* BAD! */
-    *ptr = 1337;
-}
-