X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/315bf91eb0b309b29c732ca7726df1f6ca9f567e..35c4d2161ea07cfbb4085d7e5242ab9939889afa:/src/main.rs?ds=sidebyside

diff --git a/src/main.rs b/src/main.rs
index e151dc1..d7dbcb0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -17,41 +17,79 @@
 // 
 // I will assume some familiarity with programming, and hence not explain the basic
 // concepts common to most languages. Instead, I will focus on what makes Rust special.
+//
+// Why Rust?
+// ---------
 // 
-// Prerequisites
-// -------------
+// When you got here, I am kind of assuming that you already decided to give Rust at
+// least a look, so that I don't have to do much convincing here ;-) . But just in
+// case, here's why I think Rust is worth learning:<br/>
+// At this time, Rust is a language with a pretty unique set of goals. Rust aims to
+// achieve C++-style control over memory and execution behavior (like, static vs. dynamic
+// dispatch), which makes it possible to construct abstractions that carry no run-time
+// cost. This is combined with the comfort of high-level functional languages and guaranteed
+// safety (as in, the program will not crash). The vast majority of existing
+// languages sacrificies one of these goals for the other. In particular, the
+// first requirement rules out a garbage collector: Rust can run "mare metal".
+// In fact, Rust rules out more classes of bugs than languages that achieve safety
+// with a GC: Besides dangling pointers and double-free, Rust also prevents issues
+// such as iterator invalidation and race conditions.
+// 
+// 
+// Getting started
+// ---------------
 // 
 // You will need to have Rust installed, of course. It is available for download on
 // [the Rust website](http://www.rust-lang.org/). At this point, I plan to restrict
 // myself to stable Rust, so "Recommended" version is just right.
 // You can find some more installation instructions in
 // [the second chapter of The Book](https://doc.rust-lang.org/stable/book/installing-rust.html).
-// When you are done, running `cargo build` in the root of Rust-101 should successfully compile
-// all the code.
-// 
-// Getting the source
-// ------------------
+
+// Next, fetch the Rust-101 source code from the [git repository](http://www.ralfj.de/git/rust-101.git)
+// (also available [on GitHub](https://github.com/RalfJung/rust-101)). Running `cargo build`
+// in the root of the repository should now succeed.
 // 
-// You are meant to play around with the source code of the course as you go on, so please
-// fetch it from the [git repository](http://www.ralfj.de/git/rust-101.git) (also available
-// [on GitHub](https://github.com/RalfJung/rust-101)).
+// I suggest you copy the folder `workspace` somewhere you like, so that you can still easily
+// `git pull` updates in the main repository. After copying, try `cargo build` in the
+// new location. It should complain about `part00::main()` not being found. Now you can start
+// by following [Part 00](part00.html), typing in `part00.rs`. If you need to add a new file, remember to also
+// add it to `main.rs` so that Rust finds it.
 // 
+// If you do not want to copy all the code yourself, and wish to start with my code and just edit
+// it, you can copy the files from `src` in this repository, to `src` in your workspace copy.
+
 // Course Content
 // --------------
 // 
-// The actual course is in the partXX.rs files. I suggest you get started with
-// [the first part](part00.html), or jump directly to where you left off:
+// The actual course is in the partXX.rs files. The part 00-03 cover some basic of the language,
+// to give you a feeling for Rust's syntax and pervasive mechanisms like pattern matching and traits.
+// Parts 04-06 introduce the heart of the language, the mechanism making it different from anything
+// else out there: Ownership, borrowing, lifetimes. In part 07-??, we continue our tour through
+// Rust. Finally, in parts ??-??, we implement our own version of `grep`, exhibiting useful Rust
+// features as we go.
+// 
+// You should start with [the first part](part00.html), or jump directly to where you left off:
 // 
-// * [Part 00](part00.html)
-// * [Part 01](part01.html)
-// * [Part 02](part02.html)
-// * [Part 03](part03.html)
+// * [Part 00: Algebraic datatypes](part00.html)
+// * [Part 01: Expressions, Inherent methods](part01.html)
+// * [Part 02: Generic types, Traits](part02.html)
+// * [Part 03: Input](part03.html)
+// * [Part 04: Ownership, Borrowing](part04.html)
+// * [Part 05: Clone](part05.html)
+// * [Part 06: Copy, Lifetimes](part06.html)
+// * [Part 07: Operator Overloading, Tests, Formating](part07.html)
 // * (to be continued)
-#![allow(dead_code, unused_imports, unused_variables)]
+#![allow(dead_code, unused_imports, unused_variables, unused_mut)]
 mod part00;
 mod part01;
 mod part02;
 mod part03;
+mod part04;
+mod part05;
+mod part06;
+mod part07;
+mod part08;
+mod part09;
 
 // To actually run the code of some part (after filling in the blanks, if necessary), simply edit the `main`
 // function.