cleanup III

Chapter06/code-generation/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "custom-designators"
+version = "0.1.0"
+authors = ["Claus Matzinger <claus.matzinger+kb@gmail.com>"]
+edition = "2018"
+
+[dependencies]

Chapter06/code-generation/src/lib.rs

@@ -0,0 +1,71 @@
+#![allow(unused_macros)]
+
+macro_rules! default_enum {
+    ($name: ident, $($variant: ident => $val:expr),+) => {
+        #[derive(Eq, PartialEq, Clone, Debug)]
+        pub enum $name {
+            Invalid,
+            $($variant = $val),+
+        }
+
+        impl Default for $name {
+            fn default() -> Self { $name::Invalid }
+        }
+    };
+}
+
+// Declare a function in a macro!
+macro_rules! make_fn {
+    ($i: ident, $body: block) => {
+        fn $i () $body
+    } 
+}
+
+
+// Repeat the statement that was passed in n times
+macro_rules! n_times {
+    // `()` indicates that the macro takes no argument.
+    ($n: expr, $f: block) => {
+        for _ in 0..$n {
+            $f()
+        }
+    }
+}
+
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_n_times() {
+        let mut i = 0;
+        n_times!(5, {
+            i += 1;
+        });
+        assert_eq!(i, 5);
+    }
+
+    #[test]
+    #[should_panic]
+    fn test_failing_make_fn() {
+        make_fn!(fail, {assert!(false)});
+        fail();
+    }
+
+    #[test]
+    fn test_make_fn() {
+        make_fn!(fail, {assert!(false)});
+        // nothing happens if we don't call the function
+    }
+
+    #[test]
+    fn test_default_enum() {
+        default_enum!(Colors, Red => 0xFF0000, Blue => 0x0000FF);
+        let color: Colors = Default::default();
+        assert_eq!(color, Colors::Invalid);
+        assert_eq!(Colors::Red as i32, 0xFF0000);
+        assert_eq!(Colors::Blue as i32, 0x0000FF);
+        
+    }
+
+    
+}

Chapter06/custom-macros/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "custom-macros"
+version = "0.1.0"
+authors = ["Claus Matzinger <claus.matzinger+kb@gmail.com>"]
+edition = "2018"
+
+[dependencies]

Chapter06/custom-macros/src/main.rs

@@ -0,0 +1,39 @@
+mod macros {
+    // Exporting macros to other modules
+    #[macro_export]
+    macro_rules! two_plus_two {
+        () => { 2 + 2 };
+    }
+}
+
+// A simple macro without arguments
+macro_rules! one_plus_one {
+    () => { 1 + 1 };
+}
+
+
+// A simple pattern matching argument
+macro_rules! one_and_one {
+    (plus) => { 1 + 1 };
+    (minus) => { 1 - 1 };
+    (mult) => { 1 * 1 };
+}
+
+fn main() {
+
+    println!("Did the pattern match? '{}'", strange_patterns!(The pattern must match precisely));
+
+    make_fn!(awesome_fn, { println!("Called awesome_fn")});
+    awesome_fn();
+    
+    println!("1 + 1 = {}", one_plus_one!());
+    println!("1 + 1 = {}", one_and_one!(plus));
+    println!("1 - 1 = {}", one_and_one!(minus));
+    println!("1 * 1 = {}", one_and_one!(mult));
+
+    println!("2 + 2 = {}", two_plus_two!());
+
+    n_times!({10}, || println!("Hello World!"));
+    // n_times!(-10, || println!("negative?"));
+    // n_times!(2.2, || println!("floats?"));
+}

Chapter06/dry-macros/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "dry-macros"
+version = "0.1.0"
+authors = ["Claus Matzinger <claus.matzinger+kb@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

Chapter06/dry-macros/src/lib.rs

@@ -1,46 +1,37 @@
-//-- #########################
-//-- Task: Implement DRY
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 March 17
-//-- #########################
-
-
-// Calling standard libraries 
 use std::ops::{Add, Mul, Sub};
 
 macro_rules! assert_equal_len {
     // The `tt` (token tree) designator is used for
     // operators and tokens.
-    ($a:ident, $b: ident, $func:ident, $op:tt) => (
-        assert!($a.len() == $b.len(),
-                "{:?}: dimension mismatch: {:?} {:?} {:?}",
+    ($a:ident, $b: ident, $func:ident) => (
+        assert_eq!($a.len(), $b.len(),
+                "{:?}: dimension mismatch: {:?} {:?}",
                 stringify!($func),
                 ($a.len(),),
-                stringify!($op),
                 ($b.len(),));
     )
 }
 
 macro_rules! op {
-    ($func:ident, $bound:ident, $op:tt, $method:ident) => (
-        fn $func<T: $bound<T, Output=T> + Copy>(xs: &mut Vec<T>, ys: &Vec<T>) {
-            assert_equal_len!(xs, ys, $func, $op);
+    ($func:ident, $bound:ident, $method:ident) => (
+        pub fn $func<T: $bound<T, Output=T> + Copy>(xs: &mut Vec<T>, ys: &Vec<T>) {
+            assert_equal_len!(xs, ys, $func);
 
             for (x, y) in xs.iter_mut().zip(ys.iter()) {
                 *x = $bound::$method(*x, *y);
-                // *x = x.$method(*y);
             }
         }
     )
 }
 
 // Implement `add_assign`, `mul_assign`, and `sub_assign` functions.
-op!(add_assign, Add, +=, add);
-op!(mul_assign, Mul, *=, mul);
-op!(sub_assign, Sub, -=, sub);
+op!(add_assign, Add, add);
+op!(mul_assign, Mul, mul);
+op!(sub_assign, Sub, sub);
 
+#[cfg(test)]
 mod test {
+
     use std::iter;
     macro_rules! test {
         ($func: ident, $x:expr, $y:expr, $z:expr) => {
@@ -63,4 +54,4 @@ mod test {
     test!(add_assign, 1u32, 2u32, 3u32);
     test!(mul_assign, 2u32, 3u32, 6u32);
     test!(sub_assign, 3u32, 2u32, 1u32);
-}
+}

Chapter06/macro-overloading/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "macro-overloading"
+version = "0.1.0"
+authors = ["Claus Matzinger <claus.matzinger+kb@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

Chapter06/macro-overloading/src/lib.rs

@@ -0,0 +1,65 @@
+#![allow(unused_macros)]
+
+
+macro_rules! print_debug {
+    (stdout, $($o:expr),*) => {
+        $(print!("{:?}", $o));*;
+        println!();
+    };
+    (error, $($o:expr),*) => {
+        $(eprint!("{:?}", $o));*;
+        eprintln!();
+    };
+    ($stream:expr, $($o:expr),*) => {
+        $(let _ = write!($stream, "{:?}", $o));*;
+        let _ = writeln!($stream);
+    }
+}
+
+
+#[cfg(test)]
+mod tests {
+    use std::io::Write;
+
+    #[test]
+    fn test_printer() {
+        print_debug!(error, "hello std err");
+        print_debug!(stdout, "hello std out");
+        let mut v = vec![];
+        print_debug!(&mut v, "a");
+        assert_eq!(v, vec![34, 97, 34, 10]);
+
+    }
+
+    macro_rules! mock {
+        ($type: ty, $name: ident, $ret_val: ty, $val: block) => {
+            pub trait $name {
+                fn $name(&self) -> $ret_val;
+            }
+
+            impl $name for $type {
+                fn $name(&self) -> $ret_val $val
+            }
+        };
+        ($name: ident, $($variant: ident => $type:ty),+) => {
+            #[derive(PartialEq, Clone, Debug)]
+            struct $name {
+                $(pub $variant: $type),+
+            }
+        };
+    }
+
+    mock!(String, hello, &'static str, { "Hi!" });
+    mock!(HelloWorld, greeting => String, when => u64);
+
+    #[test]
+    fn test_mock() {
+        let mystr = "Hello".to_owned();
+        assert_eq!(mystr.hello(), "Hi!");
+
+        let g = HelloWorld { greeting: "Hello World".to_owned(), when: 1560887098 };
+
+        assert_eq!(g.greeting, "Hello World");
+        assert_eq!(g.when, 1560887098);
+    }
+}

Chapter06/matching/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "matching"
+version = "0.1.0"
+authors = ["Claus Matzinger <claus.matzinger+kb@gmail.com>"]
+edition = "2018"
+
+[dependencies]

Chapter06/matching/src/lib.rs

@@ -0,0 +1,48 @@
+#![allow(unused_variables, unused_macros)]
+
+macro_rules! strange_patterns {
+    (The pattern must match precisely) => { "Text" };
+    (42) => { "Numeric" };
+    (;<=,<=;) => { "Alpha" };
+}
+
+macro_rules! compare {
+    ($x:literal => $y:block) => { $x == $y };
+}
+
+#[derive(Debug)]
+pub struct Response(usize);
+pub fn register_handler(method: &str, path: &str, handler: &Fn() -> Response ) {
+    // do stuff here
+}
+
+// Example of more sophisticated pattern matching
+macro_rules! web {
+    (GET $path:literal => $b:block) => { register_handler("GET", $path, &|| $b) };
+    (POST $path:literal => $b:block) => { register_handler("POST", $path, &|| $b) };
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_web() {
+        // this doesn't actually do anything, so as long as it compiles, it's fine
+        web!(GET "/" => { Response(200) });
+        web!(POST "/" => { Response(403) });
+    }
+ 
+
+    #[test]
+    fn test_strange_patterns() {
+        assert_eq!(strange_patterns!(The pattern must match precisely), "Text");
+        assert_eq!(strange_patterns!(42), "Numeric");
+        assert_eq!(strange_patterns!(;<=,<=;), "Alpha");
+    }
+
+    #[test]
+    fn test_compare() {
+        assert!(compare!(1 => { 1 }));
+    }
+}

Chapter06/parameter-ranges/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "parameter-ranges"
+version = "0.1.0"
+authors = ["Claus Matzinger <claus.matzinger+kb@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

Chapter06/parameter-ranges/src/lib.rs

@@ -0,0 +1,56 @@
+#![allow(unused_macros)]
+
+
+macro_rules! set {
+ ( $( $item:expr ),* ) => {
+        {
+            let mut s = HashSet::new();
+            $(
+                s.insert($item);
+            )*
+            s
+        }
+    };
+}
+
+macro_rules! dto {
+    ($name: ident, $($variant: ident => $type:ty),+) => {
+        #[derive(PartialEq, Clone, Debug)]
+        pub struct $name {
+            $(pub $variant: $type),+
+        }
+
+        impl $name {
+            pub fn new($($variant:$type),+) -> Self {
+                $name {
+                    $($variant: $variant),+
+                }
+             }
+        }
+    };
+}
+
+
+#[cfg(test)]
+mod tests {
+    use std::collections::HashSet;
+
+
+    #[test]
+    fn test_set() {
+        let actual = set!("a", "b", "c", "a");
+        let mut desired = HashSet::new();
+        desired.insert("a");
+        desired.insert("b");
+        desired.insert("c");
+        assert_eq!(actual, desired);    
+    }
+
+    #[test]
+    fn test_dto() {
+        dto!(Sensordata, value => f32, timestamp => u64);
+        let s = Sensordata::new(1.23f32, 123456);
+        assert_eq!(s.value, 1.23f32);    
+        assert_eq!(s.timestamp, 123456);    
+    }
+}

Chapter06/sample_aliases_result.rs

@@ -1,29 +0,0 @@
-//-- #########################
-//-- Task: Implementing mapt for Result 
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-use std::num::ParseIntError;
-
-// Define a generic alias for a `Result` with the error type `ParseIntError`.
-type AliasedResult<T> = Result<T, ParseIntError>;
-
-// Use the above alias to refer to our specific `Result` type.
-fn double_number(number_str: &str) -> AliasedResult<i32> {
-    number_str.parse::<i32>().map(|n| 2 * n)
-}
-
-// Here, the alias again allows us to save some space.
-fn print(result: AliasedResult<i32>) {
-    match result {
-        Ok(n)  => println!("n is {}", n),
-        Err(e) => println!("Error: {}", e),
-    }
-}
-
-fn main() {
-    print(double_number("10"));
-    print(double_number("t"));
-}

Chapter06/sample_and_then.rs

@@ -1,47 +0,0 @@
-//-- #########################
-//-- Task: Implementing and_then 
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-#![allow(dead_code)]
-
-#[derive(Debug)] enum Food { CordonBleu, Steak, Sushi }
-#[derive(Debug)] enum Day { Monday, Tuesday, Wednesday }
-
-// We don't have the ingredients to make Sushi.
-fn have_ingredients(food: Food) -> Option<Food> {
-    match food {
-        Food::Sushi => None,
-        _           => Some(food),
-    }
-}
-
-// We have the recipe for everything except Cordon Bleu.
-fn have_recipe(food: Food) -> Option<Food> {
-    match food {
-        Food::CordonBleu => None,
-        _                => Some(food),
-    }
-}
-
-// This can conveniently be rewritten more compactly with `and_then()`:
-fn cookable(food: Food) -> Option<Food> {
-    have_ingredients(food).and_then(have_recipe)
-}
-
-fn eat(food: Food, day: Day) {
-    match cookable(food) {
-        Some(food) => println!("Yay! On {:?} we get to eat {:?}.", day, food),
-        None       => println!("Oh no. We don't get to eat on {:?}?", day),
-    }
-}
-
-fn main() {
-    let (cordon_bleu, steak, sushi) = (Food::CordonBleu, Food::Steak, Food::Sushi);
-
-    eat(cordon_bleu, Day::Monday);
-    eat(steak, Day::Tuesday);
-    eat(sushi, Day::Wednesday);
-}

Chapter06/sample_designator.rs

@@ -1,49 +0,0 @@
-//-- #########################
-//-- Task: Implmenting designator
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 March 17
-//-- #########################
-
-macro_rules! create_function {
-    // This macro takes an argument of designator `ident` and
-    // creates a function named `$func_name`.
-    // The `ident` designator is used for variable/function names.
-    ($func_name:ident) => (
-        fn $func_name() {
-            // The `stringify!` macro converts an `ident` into a string.
-            println!("You called {:?}()",
-                     stringify!($func_name))
-        }
-    )
-}
-
-// Create functions named `foo` and `bar` with the above macro.
-create_function!(foo);
-create_function!(bar);
-
-macro_rules! print_result {
-    // This macro takes an expression of type `expr` and prints
-    // it as a string along with its result.
-    // The `expr` designator is used for expressions.
-    ($expression:expr) => (
-        // `stringify!` will convert the expression *as it is* into a string.
-        println!("{:?} = {:?}",
-                 stringify!($expression),
-                 $expression)
-    )
-}
-
-fn main() {
-    foo();
-    bar();
-
-    print_result!(1u32 + 1);
-
-    // Recall that blocks are expressions too!
-    print_result!({
-        let x = 1u32;
-
-        x * x + 2 * x - 1
-    });
-}

Chapter06/sample_early_ret.rs

@@ -1,40 +0,0 @@
-//-- #########################
-//-- Task: Implementing early returns
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-// Use `String` as our error type
-type Result<T> = std::result::Result<T, String>;
-
-fn double_first(vec: Vec<&str>) -> Result<i32> {
-   // Convert the `Option` to a `Result` if there is a value.
-   // Otherwise, provide an `Err` containing this `String`.
-    let first = match vec.first() {
-        Some(first) => first,
-        None => return Err("Please use a vector with at least one element.".to_owned())
-    };
-
-    // Double the number inside if `parse` works fine.
-    // Otherwise, map any errors that `parse` yields to `String`.
-    match first.parse::<i32>() {
-        Ok(i) => Ok(2 * i),
-        Err(e) => Err(e.to_string()),
-    }
-}
-
-fn print(result: Result<i32>) {
-    match result {
-        Ok(n)  => println!("The first doubled is {}", n),
-        Err(e) => println!("Error: {}", e),
-    }
-}
-
-fn main() {
-    let empty = vec![];
-    let strings = vec!["tofu", "93", "18"];
-
-    print(double_first(empty));
-    print(double_first(strings));
-}

Chapter06/sample_macro.rs

@@ -1,20 +0,0 @@
-//-- #########################
-//-- Task: Building your first macro in Rust
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 March 17
-//-- #########################
-
-// This is a simple macro named `say_hello`.
-macro_rules! Welcome_RustBook {
-    // `()` indicates that the macro takes no argument.
-    () => (
-        // The macro will expand into the contents of this block.
-        println!("Welcome to Rust Cookbook!");
-    )
-}
-
-fn main() {
-    // This call will expand into `println!("Hello");`
-    Welcome_RustBook!()
-}

Chapter06/sample_map.rs

@@ -1,68 +0,0 @@
-//-- #########################
-//-- Task: Implementing map 
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-#![allow(dead_code)]
-
-#[derive(Debug)] enum Food { Apple, Carrot, Potato }
-
-#[derive(Debug)] struct Peeled(Food);
-#[derive(Debug)] struct Chopped(Food);
-#[derive(Debug)] struct Cooked(Food);
-
-// Peeling food. If there isn't any, then return `None`.
-// Otherwise, return the peeled food.
-fn peel(food: Option<Food>) -> Option<Peeled> {
-    match food {
-        Some(food) => Some(Peeled(food)),
-        None       => None,
-    }
-}
-
-// Chopping food. If there isn't any, then return `None`.
-// Otherwise, return the chopped food.
-fn chop(peeled: Option<Peeled>) -> Option<Chopped> {
-    match peeled {
-        Some(Peeled(food)) => Some(Chopped(food)),
-        None               => None,
-    }
-}
-
-// Cooking food. Here, we showcase `map()` instead of `match` for case handling.
-fn cook(chopped: Option<Chopped>) -> Option<Cooked> {
-    chopped.map(|Chopped(food)| Cooked(food))
-}
-
-// A function to peel, chop, and cook food all in sequence.
-// We chain multiple uses of `map()` to simplify the code.
-fn process(food: Option<Food>) -> Option<Cooked> {
-    food.map(|f| Peeled(f))
-        .map(|Peeled(f)| Chopped(f))
-        .map(|Chopped(f)| Cooked(f))
-}
-
-// Check whether there's food or not before trying to eat it!
-fn eat(food: Option<Cooked>) {
-    match food {
-        Some(food) => println!("Mmm. I love {:?}", food),
-        None       => println!("Oh no! It wasn't edible."),
-    }
-}
-
-fn main() {
-    let apple = Some(Food::Apple);
-    let carrot = Some(Food::Carrot);
-    let potato = None;
-
-    let cooked_apple = cook(chop(peel(apple)));
-    let cooked_carrot = cook(chop(peel(carrot)));
-    // Let's try the simpler looking `process()` now.
-    let cooked_potato = process(potato);
-
-    eat(cooked_apple);
-    eat(cooked_carrot);
-    eat(cooked_potato);
-}

Chapter06/sample_map_result.rs

@@ -1,40 +0,0 @@
-//-- #########################
-//-- Task: Implementing mapt for Result 
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-use std::num::ParseIntError;
-
-// With the return type rewritten, we use pattern matching without `unwrap()`.
-fn double_number(number_str: &str) -> Result<i32, ParseIntError> {
-    match number_str.parse::<i32>() {
-        Ok(n)  => Ok(2 * n),
-        Err(e) => Err(e),
-    }
-}
-
-// As with `Option`, we can use combinators such as `map()`.
-// This function is otherwise identical to the one above and reads:
-// Modify n if the value is valid, otherwise pass on the error.
-fn double_number_map(number_str: &str) -> Result<i32, ParseIntError> {
-    number_str.parse::<i32>().map(|n| 2 * n)
-}
-
-fn print(result: Result<i32, ParseIntError>) {
-    match result {
-        Ok(n)  => println!("n is {}", n),
-        Err(e) => println!("Error: {}", e),
-    }
-}
-
-fn main() {
-    // This still presents a reasonable answer.
-    let twenty = double_number("10");
-    print(twenty);
-
-    // The following now provides a much more helpful error message.
-    let tt = double_number_map("t");
-    print(tt);
-}

Chapter06/sample_match.rs

@@ -1,15 +0,0 @@
-//-- #########################
-//-- Task: Implement matching
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 March 17
-//-- #########################
-
-macro_rules! foo {
-    (x => $e:expr) => (println!("mode X: {}", $e));
-    (y => $e:expr) => (println!("mode Y: {}", $e));
-}
-
-fn main() {
-    foo!(y => 3);
-}

Chapter06/sample_multiple_err.rs

@@ -1,37 +0,0 @@
-//-- #########################
-//-- Task: Handling multiple error 
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-// Use `String` as our error type
-type Result<T> = std::result::Result<T, String>;
-
-fn double_first(vec: Vec<&str>) -> Result<i32> {
-    vec.first()
-       // Convert the `Option` to a `Result` if there is a value.
-       // Otherwise, provide an `Err` containing this `String`.
-       .ok_or("Please use a vector with at least one element.".to_owned())
-       .and_then(|s| s.parse::<i32>()
-                      // Map any errors that `parse` yields to `String`.
-                      .map_err(|e| e.to_string())
-                      // `Result<T, String>` is the new return type, 
-                      // and we can now double the number inside.
-                      .map(|i| 2 * i))
-}
-
-fn print(result: Result<i32>) {
-    match result {
-        Ok(n)  => println!("The first doubled is {}", n),
-        Err(e) => println!("Error: {}", e),
-    }
-}
-
-fn main() {
-    let empty = vec![];
-    let strings = vec!["tofu", "93", "18"];
-
-    print(double_first(empty));
-    print(double_first(strings));
-}

Chapter06/sample_option.rs

@@ -1,44 +0,0 @@
-//-- #########################
-//-- Task: Implementing Options 
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-// All arguments are handled explicitly using `match`.
-fn compare_stmt_match(input: Option<&str>) {
-    // Specify a course of action for each case.
-    match input {
-        Some("Rust CookBook") => println!("Rust CookBook was selected"),
-        Some(inner)   => println!("Rust CookBook not selected"),
-        None          => println!("No input provided"),
-    }
-}
-
-// All arguments are handled implicitly using `unwrap`.
-fn compare_stmt_unwrap(input: Option<&str>) {
-    // `unwrap` returns a `panic` when it receives a `None` value
-    let inside_val = input.unwrap();
-    if inside_val == "Another Book" { panic!("Rust CookBook is not selected"); }
-
-    println!("I love {}s!!!!!", inside_val);
-}
-
-// main execution starts here
-fn main() {
-    let Desired_Book  = Some("Rust CookBook");
-    let Another_Book = Some("Another Book");
-    let Empty_value  = None;
-
-    compare_stmt_match(Desired_Book);
-    compare_stmt_match(Another_Book);
-    compare_stmt_match(Empty_value);
-
-    println!("*********************");
-
-    let Rand_Book = Some("Random Book");
-    let No_val = None;
-
-    compare_stmt_unwrap(Rand_Book);
-    compare_stmt_unwrap(No_val);
-}

Chapter06/sample_overloading_macro.rs

@@ -1,31 +0,0 @@
-//-- #########################
-//-- Task: Overloading Macros
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 March 17
-//-- #########################
-
-// `test!` will compare `$left` and `$right`
-// in different ways depending on how you invoke it:
-macro_rules! test {
-    // Arguments don't need to be separated by a comma.
-    // Any template can be used!
-    ($left:expr; and $right:expr) => (
-        println!("{:?} and {:?} is {:?}",
-                 stringify!($left),
-                 stringify!($right),
-                 $left && $right)
-    );
-    // ^ each arm must end with a semicolon.
-    ($left:expr; or $right:expr) => (
-        println!("{:?} or {:?} is {:?}",
-                 stringify!($left),
-                 stringify!($right),
-                 $left || $right)
-    );
-}
-
-fn main() {
-    test!(1i32 + 1 == 2i32; and 2i32 * 2 == 4i32);
-    test!(true; or false);
-}

Chapter06/sample_panic.rs

@@ -1,22 +0,0 @@
-//-- #########################
-//-- Task: Implementing panic 
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-// function which checks if the strings are same or not
-fn compare_stmt(stmt: &str) {
-    // Check if the statements are same or not 
-    if stmt == "Another book" { 
-    	panic!("Rust Cookbook is not selected!!!!"); 
-    }
-
-    println!("Statements is {}!!!!!", stmt);
-}
-
-// Execution starts here
-fn main() {
-    compare_stmt("Rust Cookbook");
-    compare_stmt("Another book");
-}

Chapter06/sample_repeat.rs

@@ -1,23 +0,0 @@
-//-- #########################
-//-- Task: Implementing repeats
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 March 17
-//-- #########################
-
-// `min!` will calculate the minimum of any number of arguments.
-macro_rules! find_min {
-    // Base case:
-    ($x:expr) => ($x);
-    // `$x` followed by at least one `$y,`
-    ($x:expr, $($y:expr),+) => (
-        // Call `find_min!` on the tail `$y`
-        std::cmp::min($x, find_min!($($y),+))
-    )
-}
-
-fn main() {
-    println!("{}", find_min!(1u32));
-    println!("{}", find_min!(1u32 + 2 , 2u32));
-    println!("{}", find_min!(5u32, 2u32 * 3, 4u32));
-}

Chapter06/sample_try.rs

@@ -1,34 +0,0 @@
-//-- #########################
-//-- Task: Implementing try!
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 26 March 17
-//-- #########################
-
-// Use `String` as our error type
-type Result<T> = std::result::Result<T, String>;
-
-fn double_first(vec: Vec<&str>) -> Result<i32> {
-    let first = try!(vec.first()
-        .ok_or("Please use a vector with at least one element.".to_owned()));
-
-    let value = try!(first.parse::<i32>()
-        .map_err(|e| e.to_string()));
-
-    Ok(2 * value)
-}
-
-fn print(result: Result<i32>) {
-    match result {
-        Ok(n)  => println!("The first doubled is {}", n),
-        Err(e) => println!("Error: {}", e),
-    }
-}
-
-fn main() {
-    let empty = vec![];
-    let strings = vec!["tofu", "93", "18"];
-
-    print(double_first(empty));
-    print(double_first(strings));
-}

Chapter06/std-macros/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "std-macros"
+version = "0.1.0"
+authors = ["Claus Matzinger <claus.matzinger+kb@gmail.com>"]
+edition = "2018"
+
+[dependencies]

Chapter06/std-macros/src/a.txt

@@ -0,0 +1 @@
+Hello World!

Chapter06/std-macros/src/main.rs

@@ -0,0 +1,20 @@
+
+#[derive(Debug)]
+pub struct MyStruct(usize);
+
+
+fn main() {
+    println!("Hello, world!");
+
+    println!("a vec: {:?}", vec!{1, 2, 3});
+    println!("concat: {}", concat!(0, 'x', "5ff"));
+    println!("MyStruct stringified: {}", stringify!(MyStruct(10)));
+    println!("some random word stringified: {}", stringify!(helloworld));
+
+    println!("Running on Windows? {}", cfg!(windows));
+    println!("From a file: {}", include_str!("a.txt"));
+    println!("$PATH: {:?}", option_env!("lala")); // evaluated at compile time!
+
+    eprintln!("Oh no!");
+    debug_assert!(true);
+}

Chapter07/bindgen/rust-tinyexpr/build.rs

@@ -1,5 +1,3 @@
-extern crate bindgen;
-
 use std::env;
 use std::env::var;
 
@@ -12,6 +10,11 @@ fn main() {
 
     println!("cargo:rustc-link-search={}/../tinyexpr/", project_dir);
     println!("cargo:rustc-link-lib=static=tinyexpr");
+
+    if cfg!(target_env = "msvc") {
+        println!("cargo:rustc-link-lib=static=legacy_stdio_definitions");
+    }
+    
     let bindings = bindgen::Builder::default()
         .header(HEADER_FILE_NAME)
         .generate()

Chapter10/sample_app/.gitignore

@@ -1,2 +0,0 @@
-target/
-**/*.rs.bk

Chapter10/sample_app/Cargo.lock

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Chapter10/sample_app/Cargo.toml

@@ -1,10 +0,0 @@
-[package]
-name = "sample_app"
-version = "0.1.0"
-authors = ["Vigneshwer.D <dvigneshwer@gmail.com>"]
-
-[dependencies]
-nickel = "*"
-mongodb = "*"
-bson = "*"
-rustc-serialize = "*"

Chapter10/sample_app/src/main.rs

@@ -1,139 +0,0 @@
-//-- #########################
-//-- Task: Perform DELETE action
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 April 17
-//-- ######################### 
-
-#[macro_use]
-extern crate nickel;
-extern crate rustc_serialize;
-
-#[macro_use(bson, doc)]
-extern crate bson;
-extern crate mongodb;
-
-// Nickel
-use nickel::{Nickel, JsonBody, HttpRouter, MediaType};
-use nickel::status::StatusCode::{self};
-
-// MongoDB
-use mongodb::{Client, ThreadedClient};
-use mongodb::db::ThreadedDatabase;
-use mongodb::error::Result as MongoResult;
-
-// bson
-use bson::{Bson, Document};
-use bson::oid::ObjectId;
-
-// rustc_serialize
-use rustc_serialize::json::{Json, ToJson};
-
-#[derive(RustcDecodable, RustcEncodable)]
-struct User {
-    firstname: String,
-    lastname: String,
-    email: String
-}
-
-fn main() {
-
-    let mut server = Nickel::new();
-    let mut router = Nickel::router();
-
-    router.get("/users", middleware! { |request, response|
-
-	    // Connect to the database
-	    let client = Client::connect("localhost", 27017)
-	      .ok().expect("Error establishing connection.");
-
-	    // The users collection
-	    let coll = client.db("rust-users").collection("users");
-
-	    // Create cursor that finds all documents
-	    let mut cursor = coll.find(None, None).unwrap();
-
-	    // Opening for the JSON string to be returned
-	    let mut data_result = "{\"data\":[".to_owned();
-
-	    for (i, result) in cursor.enumerate() {
-	        
-	    	if let Ok(item) = result {
-	    	        if let Some(&Bson::String(ref firstname)) = item.get("firstname") {
-	    	           
-	    	            let string_data = if i == 0 {
-    	                    format!("{},", firstname)
-    	                } else {
-    	                    format!("{},", firstname)
-    	                };
-    	                data_result.push_str(&string_data);
-	    	        }
-
-	    	        
-	    	    }
-	    }
-
-	    // Close the JSON string
-	    data_result.push_str("]}");
-
-	    // Send back the result
-	    format!("{}", data_result)
-
-	});
-
-	router.post("/users/new", middleware! { |request, response|
-
-	    // Accept a JSON string that corresponds to the User struct
-	    let user = request.json_as::<User>().unwrap();
-
-	    let firstname = user.firstname.to_string();
-	    let lastname = user.lastname.to_string();
-	    let email = user.email.to_string();
-
-	    // Connect to the database
-	    let client = Client::connect("localhost", 27017)
-	        .ok().expect("Error establishing connection.");
-
-	    // The users collection
-	    let coll = client.db("rust-users").collection("users");
-
-	    // Insert one user
-	    match coll.insert_one(doc! {
-	        "firstname" => firstname,
-	        "lastname" => lastname,
-	        "email" => email
-	    }, None) {
-	        Ok(_) => (StatusCode::Ok, "Item saved!"),
-	        Err(e) => return response.send(format!("{}", e))
-	    }
-
-	});
-	
-	router.delete("/users/:id", middleware! { |request, response|
-
-	    let client = Client::connect("localhost", 27017)
-	        .ok().expect("Failed to initialize standalone client.");
-
-	    // The users collection
-	    let coll = client.db("rust-users").collection("users");
-
-	    // Get the objectId from the request params
-	    let object_id = request.param("id").unwrap();
-
-	    // Match the user id to an bson ObjectId
-	    let id = match ObjectId::with_string(object_id) {
-	        Ok(oid) => oid,
-	        Err(e) => return response.send(format!("{}", e))
-	    };
-
-	    match coll.delete_one(doc! {"_id" => id}, None) {
-	        Ok(_) => (StatusCode::Ok, "Item deleted!"),
-	        Err(e) => return response.send(format!("{}", e))
-	    }
-
-	});
-
-    server.utilize(router);
-
-    server.listen("127.0.0.1:9000");
-}

Chapter10/sample_get/.gitignore

@@ -1,2 +0,0 @@
-target/
-**/*.rs.bk

Chapter10/sample_get/Cargo.lock

@@ -1,652 +0,0 @@
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- "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
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-name = "advapi32-sys"
-version = "0.1.2"
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Chapter10/sample_get/Cargo.toml

@@ -1,12 +0,0 @@
-[package]
-name = "sample_get"
-version = "0.1.0"
-authors = ["Vigneshwer.D <dvigneshwer@gmail.com>"]
-
-[dependencies]
-nickel = "*"
-mongodb = "*"
-bson = "*"
-rustc-serialize = "*"
-
-

Chapter10/sample_get/src/main.rs

@@ -1,123 +0,0 @@
-//-- #########################
-//-- Task: Perform GET action
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 April 17
-//-- ######################### 
-
-#[macro_use]
-extern crate nickel;
-
-extern crate rustc_serialize;
-
-#[macro_use(bson, doc)]
-extern crate bson;
-extern crate mongodb;
-
-// Nickel
-use nickel::{Nickel, JsonBody, HttpRouter};
-use nickel::status::StatusCode::{self};
-
-// MongoDB
-use mongodb::{Client, ThreadedClient};
-use mongodb::db::ThreadedDatabase;
-use mongodb::error::Result as MongoResult;
-
-// bson
-use bson::{Bson, Document};
-use bson::oid::ObjectId;
-
-// rustc_serialize
-use rustc_serialize::json::{Json, ToJson};
-
-#[derive(RustcDecodable, RustcEncodable)]
-struct User {
-    firstname: String,
-    lastname: String,
-    email: String
-}
-
-
-fn main() {
-
-    let mut server = Nickel::new();
-    let mut router = Nickel::router();
-
-    router.get("/users", middleware! { |request, response|
-
-	    // Connect to the database
-	    let client = Client::connect("localhost", 27017)
-	      .ok().expect("Error establishing connection.");
-
-	    // The users collection
-	    let coll = client.db("rust-cookbook").collection("users");
-
-	    // Create cursor that finds all documents
-	    let mut cursor = coll.find(None, None).unwrap();
-
-	    // Opening for the JSON string to be returned
-	    let mut data_result = "{\"data\":[".to_owned();
-
-	    for (i, result) in cursor.enumerate() {
-	        
-	    	if let Ok(item) = result {
-	    	        if let Some(&Bson::String(ref firstname)) = item.get("firstname") {
-	    	           
-	    	            let string_data = if i == 0 {
-    	                    format!("{},", firstname)
-    	                } else {
-    	                    format!("{},", firstname)
-    	                };
-    	                data_result.push_str(&string_data);
-	    	        }
-
-	    	        
-	    	    }
-	    }
-
-	    // Close the JSON string
-	    data_result.push_str("]}");
-
-	    // Send back the result
-	    format!("{}", data_result)
-
-	});
-
-	router.post("/users/new", middleware! { |request, response|
-
-	    // Accept a JSON string that corresponds to the User struct
-	    let user = request.json_as::<User>().unwrap();
-
-	    let firstname = user.firstname.to_string();
-	    let lastname = user.lastname.to_string();
-	    let email = user.email.to_string();
-
-	    // Connect to the database
-	    let client = Client::connect("localhost", 27017)
-	        .ok().expect("Error establishing connection.");
-
-	    // The users collection
-	    let coll = client.db("rust-cookbook").collection("users");
-
-	    // Insert one user
-	    match coll.insert_one(doc! {
-	        "firstname" => firstname,
-	        "lastname" => lastname,
-	        "email" => email
-	    }, None) {
-	        Ok(_) => (StatusCode::Ok, "Item saved!"),
-	        Err(e) => return response.send(format!("{}", e))
-	    }
-
-	});
-
-	    router.delete("/users/:id", middleware! { |request, response|
-
-        format!("Hello from DELETE /users/:id")
-
-    });
-
-    server.utilize(router);
-
-    server.listen("127.0.0.1:9000");
-}

Chapter10/sample_post/.gitignore

@@ -1,2 +0,0 @@
-target/
-**/*.rs.bk

Chapter10/sample_post/Cargo.lock

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Chapter10/sample_post/Cargo.toml

@@ -1,12 +0,0 @@
-[package]
-name = "sample_post"
-version = "0.1.0"
-authors = ["Vigneshwer.D <dvigneshwer@gmail.com>"]
-
-[dependencies]
-
-nickel = "*"
-mongodb = "*"
-bson = "*"
-rustc-serialize = "*"
-

Chapter10/sample_post/src/main.rs

@@ -1,89 +0,0 @@
-//-- #########################
-//-- Task: Perform POST action
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 April 17
-//-- ######################### 
-
-#[macro_use]
-extern crate nickel;
-
-extern crate rustc_serialize;
-
-#[macro_use(bson, doc)]
-extern crate bson;
-extern crate mongodb;
-
-// Nickel
-use nickel::{Nickel, JsonBody, HttpRouter};
-use nickel::status::StatusCode::{self};
-
-// MongoDB
-use mongodb::{Client, ThreadedClient};
-use mongodb::db::ThreadedDatabase;
-use mongodb::error::Result as MongoResult;
-
-// bson
-use bson::{Bson, Document};
-use bson::oid::ObjectId;
-
-// rustc_serialize
-use rustc_serialize::json::{Json, ToJson};
-
-#[derive(RustcDecodable, RustcEncodable)]
-struct User {
-    firstname: String,
-    lastname: String,
-    email: String
-}
-
-
-fn main() {
-
-    let mut server = Nickel::new();
-    let mut router = Nickel::router();
-
-    router.get("/users", middleware! { |request, response|
-
-        format!("Hello from GET /users")
-
-    });
-
-	router.post("/users/new", middleware! { |request, response|
-
-	    // Accept a JSON string that corresponds to the User struct
-	    let user = request.json_as::<User>().unwrap();
-
-	    let firstname = user.firstname.to_string();
-	    let lastname = user.lastname.to_string();
-	    let email = user.email.to_string();
-
-	    // Connect to the database
-	    let client = Client::connect("localhost", 27017)
-	        .ok().expect("Error establishing connection.");
-
-	    // The users collection
-	    let coll = client.db("rust-cookbook").collection("users");
-
-	    // Insert one user
-	    match coll.insert_one(doc! {
-	        "firstname" => firstname,
-	        "lastname" => lastname,
-	        "email" => email
-	    }, None) {
-	        Ok(_) => (StatusCode::Ok, "Item saved!"),
-	        Err(e) => return response.send(format!("{}", e))
-	    }
-
-	});
-
-	    router.delete("/users/:id", middleware! { |request, response|
-
-        format!("Hello from DELETE /users/:id")
-
-    });
-
-    server.utilize(router);
-
-    server.listen("127.0.0.1:9000");
-}

Chapter10/sample_rest_api/.gitignore

@@ -1,2 +0,0 @@
-target/
-**/*.rs.bk

Chapter10/sample_rest_api/Cargo.lock

@@ -1,652 +0,0 @@
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- "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
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- "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
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Chapter10/sample_rest_api/Cargo.toml

@@ -1,10 +0,0 @@
-[package]
-name = "sample_rest_api"
-version = "0.1.0"
-authors = ["Vigneshwer.D <dvigneshwer@gmail.com>"]
-
-[dependencies]
-nickel = "*"
-mongodb = "*"
-bson = "*"
-rustc-serialize = "*"

Chapter10/sample_rest_api/src/main.rs

@@ -1,39 +0,0 @@
-//-- #########################
-//-- Task: Creating a simple REST API
-//-- Author: Vigneshwer.D
-//-- Version: 1.0.0
-//-- Date: 28 April 17
-//-- ######################### 
-
-#[macro_use]
-extern crate nickel;
-
-use nickel::{Nickel, JsonBody, HttpRouter, Request, Response, MiddlewareResult, MediaType};
-
-fn main() {
-
-    let mut server = Nickel::new();
-    let mut router = Nickel::router();
-
-    router.get("/users", middleware! { |request, response|
-
-        format!("Hello from GET /users")
-
-    });
-
-    router.post("/users/new", middleware! { |request, response|
-
-        format!("Hello from POST /users/new")
-
-    });
-
-    router.delete("/users/:id", middleware! { |request, response|
-
-        format!("Hello from DELETE /users/:id")
-
-    });
-
-    server.utilize(router);
-
-    server.listen("127.0.0.1:9000");
-}