Merge pull request #28 from NanXiao/patch-1

[rust-101.git] / src / part05.rs

diff --git a/src/part05.rs b/src/part05.rs
index 71d712ab9584c01b9b8b3922b1547e6ed414966d..49e57db0704e9bfa4c2bcb537a2fd431fd5d4ec4 100644 (file)
--- a/src/part05.rs
+++ b/src/part05.rs
@@ -47,11 +47,11 @@ impl BigInt {
         }
     }
 
         }
     }
 

-    // 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.
+    // We can convert any little-endian vector of digits (i.e., least-significant digit first) 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.
     // 
     // 
     // **Exercise 05.1**: Implement this function.
     // 


@@ -124,7 +124,7 @@ enum Variant {
     Text(String),
 }
 //@ Now consider the following piece of code. Like above, `n` will be a reference to a part of `var`,
     Text(String),
 }
 //@ Now consider the following piece of code. Like above, `n` will be a reference to a part of `var`,

-//@ and since we wrote `ref mut`, the reference will be exclusive and mutable. In other words, right after the match, `ptr`
+//@ and since we wrote `ref mut`, the reference will be unique and mutable. In other words, right after the match, `ptr`

 //@ points to the number that's stored in `var`, where `var` is a `Number`. Remember that `_` means
 //@ "we don't care".
 fn work_on_variant(mut var: Variant, text: String) {
 //@ points to the number that's stored in `var`, where `var` is a `Number`. Remember that `_` means
 //@ "we don't care".
 fn work_on_variant(mut var: Variant, text: String) {


@@ -147,4 +147,4 @@ fn work_on_variant(mut var: Variant, text: String) {
 //@ I hope this example clarifies why Rust has to rule out mutation in the presence of aliasing *in general*,
 //@ not just for the specific case of a buffer being reallocated, and old pointers becoming hence invalid.
 
 //@ I hope this example clarifies why Rust has to rule out mutation in the presence of aliasing *in general*,
 //@ not just for the specific case of a buffer being reallocated, and old pointers becoming hence invalid.
 

-//@ [index](main.html) | [previous](part04.html) | [raw source](https://www.ralfj.de/git/rust-101.git/blob_plain/HEAD:/workspace/src/part05.rs) | [next](part06.html)
+//@ [index](main.html) | [previous](part04.html) | [raw source](workspace/src/part05.rs) | [next](part06.html)