Remaining flow control in RBE

rustbyexample/.gitignore

@@ -1,11 +1,6 @@
-/custom_types/*
+*.d/out
-/hello/*
+*.d/**/out
-/primitives/*
+expression
-/variable_bindings/*
+hello
-/types/*
+primitives
-
+variable_bindings
-!/custom_types/*.rs
-!/hello/*.rs
-!/primitives/*.rs
-!/variable_bindings/*.rs
-!/types/*.rs

rustbyexample/conversion.d/from_into.rs

@@ -0,0 +1,18 @@
+use std::convert::From;
+
+#[allow(dead_code)]
+#[derive(Debug)]
+struct Number {
+    value: i32,
+}
+
+impl From<i32> for Number {
+    fn from(item: i32) -> Self {
+        Number { value: item }
+    }
+}
+
+fn main() {
+    let num = Number::from(30);
+    println!("My number is {:?}", num);
+}

rustbyexample/conversion.d/from_into2.rs

@@ -0,0 +1,19 @@
+use std::convert::Into;
+
+#[allow(dead_code)]
+#[derive(Debug)]
+struct Number {
+    value: i32,
+}
+
+impl Into<Number> for i32 {
+    fn into(self) -> Number {
+        Number { value: self }
+    }
+}
+
+fn main() {
+    let int = 5;
+    let num: Number = int.into();
+    println!("My number is {:?}", num);
+}

rustbyexample/conversion.d/string.rs

@@ -0,0 +1,16 @@
+use std::fmt;
+
+struct Circle {
+    radius: i32,
+}
+
+impl fmt::Display for Circle {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Circle of radius {}", self.radius)
+    }
+}
+
+fn main() {
+    let circle = Circle { radius: 6 };
+    println!("{}", circle.to_string());
+}

rustbyexample/conversion.d/string2.rs

@@ -0,0 +1,7 @@
+fn main() {
+    let parsed: i32 = "5".parse().unwrap();
+    let turbo_parsed = "10".parse::<i32>().unwrap();
+
+    let sum = parsed + turbo_parsed;
+    println!("Sum: {:?}", sum);
+}

rustbyexample/conversion.d/try_from_try_into.rs

@@ -0,0 +1,28 @@
+use std::convert::TryFrom;
+use std::convert::TryInto;
+
+#[derive(Debug, PartialEq)]
+struct EvenNumber(i32);
+
+impl TryFrom<i32> for EvenNumber {
+    type Error = ();
+
+    fn try_from(value: i32) -> Result<Self, Self::Error> {
+        if value % 2 == 0 {
+            Ok(EvenNumber(value))
+        } else {
+            Err(())
+        }
+    }
+}
+
+fn main() {
+    assert_eq!(EvenNumber::try_from(8), Ok(EvenNumber(8)));
+    assert_eq!(EvenNumber::try_from(5), Err(()));
+
+    let result: Result<EvenNumber, ()> = 8i32.try_into();
+    assert_eq!(result, Ok(EvenNumber(8)));
+
+    let result: Result<EvenNumber, ()> = 5i32.try_into();
+    assert_eq!(result, Err(()));
+}

rustbyexample/custom_types.d/structs.rs

@@ -1,3 +1,4 @@
+#[allow(dead_code)]
 #[derive(Debug)]
 struct Person {
     name: String,

rustbyexample/expression.rs

@@ -0,0 +1,25 @@
+#[allow(path_statements)]
+#[allow(unused_must_use)]
+fn main() {
+    let x = 5;
+    x;
+    x + 1;
+    15;
+
+    let x = 5u32;
+
+    let y = {
+        let x_squared = x * x;
+        let x_cube = x_squared * x;
+
+        x_cube + x_squared + x
+    };
+
+    let z = {
+        2 * x;
+    };
+
+    println!("x is {:?}", x);
+    println!("y is {:?}", y);
+    println!("z is {:?}", z);
+}

rustbyexample/flow_control.d/for.rs

@@ -0,0 +1,13 @@
+fn main() {
+    for n in 1..101 {
+        if n % 15 == 0 {
+            println!("fizzbuzz");
+        } else if n % 3 == 0 {
+            println!("fizz");
+        } else if n % 5 == 0 {
+            println!("buzz");
+        } else {
+            println!("{}", n);
+        }
+    }
+}

rustbyexample/flow_control.d/for2.rs

@@ -0,0 +1,13 @@
+fn main() {
+    for n in 1..=100 {
+        if n % 15 == 0 {
+            println!("fizzbuzz");
+        } else if n % 3 == 0 {
+            println!("fizz");
+        } else if n % 5 == 0 {
+            println!("buzz");
+        } else {
+            println!("{}", n);
+        }
+    }
+}

rustbyexample/flow_control.d/for3.rs

@@ -0,0 +1,12 @@
+fn main() {
+    let names = vec!["Bob", "Frank", "Ferris"];
+
+    for name in names.iter() {
+        match name {
+            &"Ferris" => println!("There is a rustacean among us!"),
+            _ => println!("Hello {}", name),
+        }
+    }
+
+    println!("names: {:?}", names);
+}

rustbyexample/flow_control.d/for4.rs

@@ -0,0 +1,12 @@
+fn main() {
+    let names = vec!["Bob", "Frank", "Ferris"];
+
+    for name in names.into_iter() {
+        match name {
+            "Ferris" => println!("There is a rustacean among us!"),
+            _ => println!("Hello {}", name),
+        }
+    }
+
+    //println!("names: {:?}", names);
+}

rustbyexample/flow_control.d/for5.rs

@@ -0,0 +1,12 @@
+fn main() {
+    let mut names = vec!["Bob", "Frank", "Ferris"];
+
+    for name in names.iter_mut() {
+        *name = match name {
+            &mut "Ferris" => "There is a rustacean among us!",
+            _ => "Hello",
+        }
+    }
+
+    println!("names: {:?}", names);
+}

rustbyexample/flow_control.d/if_else.rs

@@ -0,0 +1,23 @@
+fn main() {
+    let n = 5;
+
+    if n < 0 {
+        print!("{} is negative", n);
+    } else if n > 0 {
+        print!("{} is positive", n);
+    } else {
+        print!("{} is zero", n);
+    }
+
+    let big_n = if n < 10 && n > -10 {
+        println!(", and is a small number, increase net-fold");
+
+        10 * n
+    } else {
+        println!(", and is a big number, halve the number");
+
+        n / 2
+    };
+
+    println!("{} -> {}", n, big_n);
+}

rustbyexample/flow_control.d/if_let.rs

@@ -0,0 +1,25 @@
+fn main() {
+    let number = Some(7);
+    let letter: Option<i32> = None;
+    let emoticon: Option<i32> = None;
+
+    if let Some(i) = number {
+        println!("Matched {:?}!", i);
+    }
+
+    if let Some(i) = letter {
+        println!("Matched {:?}!", i);
+    } else {
+        println!("Didn't match a number. Let's go with a letter!");
+    }
+
+    let i_like_letters = false;
+
+    if let Some(i) = emoticon {
+        println!("Matched {:?}!", i);
+    } else if i_like_letters {
+        println!("Didn't match a number. Let's go with a letter!");
+    } else {
+        println!("I don't like letters. Let's go with an emoticon :)!");
+    }
+}

rustbyexample/flow_control.d/if_let2.rs

@@ -0,0 +1,27 @@
+enum Foo {
+    Bar,
+    Baz,
+    Qux(u32),
+}
+
+fn main() {
+    let a = Foo::Bar;
+    let b = Foo::Baz;
+    let c = Foo::Qux(100);
+
+    if let Foo::Bar = a {
+        println!("a is a foobar");
+    }
+
+    if let Foo::Bar = b {
+        println!("b is foobar");
+    }
+
+    if let Foo::Qux(value) = c {
+        println!("c is {}", value);
+    }
+
+    if let Foo::Qux(value @ 100) = c {
+        println!("c is one hundred (value: {:?})", value);
+    }
+}

rustbyexample/flow_control.d/if_let3.rs

@@ -0,0 +1,11 @@
+enum Foo {
+    Bar,
+}
+
+fn main() {
+    let a = Foo::Bar;
+
+    if let Foo::Bar = a {
+        println!("a is foobar");
+    }
+}

rustbyexample/flow_control.d/let_else.rs

@@ -0,0 +1,16 @@
+use std::str::FromStr;
+
+fn get_count_item(s: &str) -> (u64, &str) {
+    let mut it = s.split(' ');
+    let (Some(count_str), Some(item)) = (it.next(), it.next()) else {
+        panic!("Can't segment count item pair: '{s}'");
+    };
+    let Ok(count) = u64::from_str(count_str) else {
+        panic!("Can't parse integer: '{count_str}'");
+    };
+    (count, item)
+}
+
+fn main() {
+    assert_eq!(get_count_item("3 chairs"), (3, "chairs"));
+}

rustbyexample/flow_control.d/loop.d/nested.rs

@@ -0,0 +1,18 @@
+#![allow(unreachable_code)]
+#![allow(unused_labels)]
+
+fn main() {
+    'outer: loop {
+        println!("Entered the outer loop");
+
+        'inner: loop {
+            println!("Entered the inner loop");
+
+            break 'outer;
+        }
+
+        println!("This point will never be reached");
+    }
+
+    println!("Exited the outer loop");
+}

rustbyexample/flow_control.d/loop.d/return.rs

@@ -0,0 +1,13 @@
+fn main() {
+    let mut counter = 0;
+
+    let result = loop {
+        counter += 1;
+
+        if counter == 10 {
+            break counter * 2;
+        }
+    };
+
+    assert_eq!(result, 20);
+}

rustbyexample/flow_control.d/loop.rs

@@ -0,0 +1,23 @@
+fn main() {
+    let mut count = 0u32;
+
+    println!("Let's count until infinity!");
+
+    loop {
+        count += 1;
+
+        if count == 3 {
+            println!("three");
+
+            continue;
+        }
+
+        println!("{}", count);
+
+        if count == 5 {
+            println!("OK, that's enough");
+
+            break;
+        }
+    }
+}

rustbyexample/flow_control.d/match.d/binding.rs

@@ -0,0 +1,14 @@
+fn age() -> u32 {
+    15
+}
+
+fn main() {
+    println!("Tell me what type of person you are");
+
+    match age() {
+        0 => println!("I haven't celebrated my first birthday yet"),
+        n @ 1..=12 => println!("I'm a child of age {:?}", n),
+        n @ 13..=19 => println!("I'm a teen of age {:?}", n),
+        n => println!("I'm an old person of age {:?}", n),
+    }
+}

rustbyexample/flow_control.d/match.d/binding2.rs

@@ -0,0 +1,11 @@
+fn some_number() -> Option<u32> {
+    Some(42)
+}
+
+fn main() {
+    match some_number() {
+        Some(n @ 42) => println!("The Answer: {}!", n),
+        Some(n) => println!("Not interesting... {}", n),
+        _ => (),
+    }
+}

rustbyexample/flow_control.d/match.d/destructuring.d/destructure_enum.rs

@@ -0,0 +1,30 @@
+#[allow(dead_code)]
+enum Color {
+    Red,
+    Blue,
+    Green,
+    RGB(u32, u32, u32),
+    HSV(u32, u32, u32),
+    HSL(u32, u32, u32),
+    CMY(u32, u32, u32),
+    CMYK(u32, u32, u32, u32),
+}
+
+fn main() {
+    let color = Color::RGB(122, 17, 40);
+
+    println!("What color is it?");
+    match color {
+        Color::Red => println!("The color is Red!"),
+        Color::Blue => println!("The color is Blue!"),
+        Color::Green => println!("The color is Green!"),
+        Color::RGB(r, g, b) => println!("Red: {}, green: {}, and blue: {}!", r, g, b),
+        Color::HSV(h, s, v) => println!("Hue: {}, saturation: {}, value: {}!", h, s, v),
+        Color::HSL(h, s, l) => println!("Hue: {}, saturation: {}, lightness: {}!", h, s, l),
+        Color::CMY(c, m, y) => println!("Cyan: {}, magenta: {}, yellow: {}!", c, m, y),
+        Color::CMYK(c, m, y, k) => println!(
+            "Cyan: {}, magenta: {}, yellow: {}, key (black): {}!",
+            c, m, y, k
+        ),
+    }
+}

rustbyexample/flow_control.d/match.d/destructuring.d/destructure_pointers.rs

@@ -0,0 +1,29 @@
+fn main() {
+    let reference = &4;
+
+    match reference {
+        &val => println!("Got a value via destructuring: {:?}", val),
+    }
+
+    match *reference {
+        val => println!("Got a value via dereferencing: {:?}", val),
+    }
+
+    let _not_a_reference = 3;
+
+    let ref _is_a_reference = 3;
+
+    let value = 5;
+    let mut mut_value = 6;
+
+    match value {
+        ref r => println!("Got a reference to a value: {:?}", r),
+    }
+
+    match mut_value {
+        ref mut m => {
+            *m += 10;
+            println!("We added 10. `mut_value`: {:?}", m);
+        }
+    }
+}

rustbyexample/flow_control.d/match.d/destructuring.d/destructure_slice.rs

@@ -0,0 +1,27 @@
+fn main() {
+    let array = [1, -2, 6];
+
+    match array {
+        [0, second, third] => println!("array[0] = 0, array[1] = {}, array[2] = {}", second, third),
+
+        [1, _, third] => println!(
+            "array[0] = 1, array[2] = {} and array[1] was ignored",
+            third
+        ),
+
+        [-1, second, ..] => println!(
+            "array[0] = -1, array[1] = {} and all the other ones were ignored",
+            second
+        ),
+
+        [3, second, tail @ ..] => println!(
+            "array[0] = 3, array[1] = {} and the other elements were {:?}",
+            second, tail
+        ),
+
+        [first, middle @ .., last] => println!(
+            "array[0] = {}, middle = {:?}, array[2] = {}",
+            first, middle, last
+        ),
+    }
+}

rustbyexample/flow_control.d/match.d/destructuring.d/destructure_structures.rs

@@ -0,0 +1,19 @@
+fn main() {
+    struct Foo {
+        x: (u32, u32),
+        y: u32,
+    }
+
+    let foo = Foo { x: (1, 2), y: 3 };
+
+    match foo {
+        Foo { x: (1, b), y } => println!("First of x is 1, b = {}, y = {}", b, y),
+        Foo { y: 2, x: i } => println!("y is 2, i = {:?}", i),
+        Foo { y, .. } => println!("y = {}, we don't care about x", y),
+    }
+
+    let faa = Foo { x: (1, 2), y: 3 };
+
+    let Foo { x: x0, y: y0 } = faa;
+    println!("Outside: x0 = {x0:?}, y0 = {y0}");
+}

rustbyexample/flow_control.d/match.d/destructuring.d/destructure_tuple.rs

@@ -0,0 +1,12 @@
+fn main() {
+    let triple = (0, -2, 3);
+
+    println!("Tell me about {:?}", triple);
+    match triple {
+        (0, y, z) => println!("First is `0`, `y` is {:?}, and `z` is {:?}", y, z),
+        (1, ..) => println!("First is `1` and the rest doesn't matter"),
+        (.., 2) => println!("last is `2` and the rest doesn't matter"),
+        (3, .., 4) => println!("First is `3`, last is `4`, and the rest doesn't matter"),
+        _ => println!("It doesn't matter what they are"),
+    }
+}

rustbyexample/flow_control.d/match.d/guard.rs

@@ -0,0 +1,16 @@
+#[allow(dead_code)]
+enum Temperature {
+    Celsius(i32),
+    Fahrenheit(i32),
+}
+
+fn main() {
+    let temperature = Temperature::Celsius(35);
+
+    match temperature {
+        Temperature::Celsius(t) if t > 30 => println!("{}C is above 30 Celsius", t),
+        Temperature::Celsius(t) => println!("{}C is below 30 Celsius", t),
+        Temperature::Fahrenheit(t) if t > 86 => println!("{}F is above 86 Fahrenheit", t),
+        Temperature::Fahrenheit(t) => println!("{}F is below 86 Fahrenheit", t),
+    }
+}

rustbyexample/flow_control.d/match.d/guard2.rs

@@ -0,0 +1,9 @@
+fn main() {
+    let number: u8 = 4;
+
+    match number {
+        i if i == 0 => println!("Zero"),
+        i if i > 0 => println!("Greater than zero"),
+        _ => unreachable!("Should never happen."),
+    }
+}

rustbyexample/flow_control.d/match.rs

@@ -0,0 +1,19 @@
+fn main() {
+    let number = 13;
+
+    println!("Tell me about {}", number);
+    match number {
+        1 => println!("One!"),
+        2 | 3 | 5 | 7 | 11 => println!("This is a prime"),
+        13..=19 => println!("A teen"),
+        _ => println!("Ain't special"),
+    }
+
+    let boolean = true;
+    let binary = match boolean {
+        false => 0,
+        true => 1,
+    };
+
+    println!("{} -> {}", boolean, binary);
+}

rustbyexample/flow_control.d/while.rs

@@ -0,0 +1,17 @@
+fn main() {
+    let mut n = 1;
+
+    while n < 101 {
+        if n % 15 == 0 {
+            println!("fizzbuzz");
+        } else if n % 3 == 0 {
+            println!("fizz");
+        } else if n % 5 == 0 {
+            println!("buzz");
+        } else {
+            println!("{}", n);
+        }
+
+        n += 1;
+    }
+}

rustbyexample/flow_control.d/while_let.rs

@@ -0,0 +1,13 @@
+fn main() {
+    let mut optional = Some(0);
+
+    while let Some(i) = optional {
+        if i > 9 {
+            println!("Greater than 9, quit!");
+            optional = None;
+        } else {
+            println!("`i` is `{:?}`. Try again.", i);
+            optional = Some(i + 1);
+        }
+    }
+}

rustbyexample/hello.d/print.d/print_debug2.rs

@@ -1,3 +1,4 @@
+#[allow(dead_code)]
 #[derive(Debug)]
 struct Person<'a> {
     name: &'a str,

rustbyexample/hello.d/print.d/print_display.d/testcase_list.rs

@@ -20,6 +20,6 @@ impl fmt::Display for List {
 }
 
 fn main() {
-    let v = List(vec![1, 2, 3]);
+    let v = List(vec![6, 0, 6, 8, 0, 8, 9, 1, 1, 1, 3, 1, 2]);
     println!("{}", v);
 }

rustbyexample/primitives.d/array.rs

@@ -22,5 +22,14 @@ fn main() {
     println!("borrow a section of the array as a slice");
     analyze_slice(&ys[1..4]);
 
-    // println!("{}", xs[5]);
+    let empty_array: [u32; 0] = [];
+    assert_eq!(&empty_array, &[]);
+    assert_eq!(&empty_array, &[][..]);
+
+    for i in 0..xs.len() + 1 {
+        match xs.get(i) {
+            Some(xval) => println!("{}: {}", i, xval),
+            None => println!("Slow down! {} is too far!", i),
+        }
+    }
 }

rustbyexample/primitives.d/literals.rs

@@ -3,6 +3,8 @@ fn main() {
 
     println!("1 - 2 = {}", 1i32 - 2);
 
+    println!("1e4 is {}, -2.5e-3 is {}", 1e4, -2.5e-3);
+
     println!("true AND false is {}", true && false);
     println!("true OR false is {}", true || false);
     println!("NOT true is {}", !true);

rustbyexample/primitives.rs

@@ -1,3 +1,5 @@
+#[allow(unused_variables)]
+#[allow(unused_assignments)]
 fn main() {
     let logical: bool = true;
 

rustbyexample/types.d/alias.rs

@@ -0,0 +1,15 @@
+type NanoSecond = u64;
+type Inch = u64;
+type U64 = u64;
+
+fn main() {
+    let nanoseconds: NanoSecond = 5 as U64;
+    let inches: Inch = 2 as U64;
+
+    println!(
+        "{} nanoseconds + {} inches = {} unit?",
+        nanoseconds,
+        inches,
+        nanoseconds + inches
+    );
+}

rustbyexample/types/alias.rs

@@ -1,15 +0,0 @@
-type NanoSecond = u64;
-type Inch = u64;
-
-#[allow(non_camel_case_types)]
-type u64_t = u64;
-
-fn main() {
-    let nanoseconds: NanoSecond = 5 as u64_t;
-    let inches: Inch = 2 as u64_t;
-
-    println!("{} nanoseconds + {} inches = {} unit?",
-        nanoseconds,
-        inches,
-        nanoseconds + inches);
-}

rustbyexample/variable_bindings.d/scope2.rs

@@ -13,4 +13,3 @@ fn main() {
     let shadowed_binding = 2;
     println!("shadowed in outer block: {}", shadowed_binding);
 }
-

rustbyexample/variable_bindings.rs

@@ -11,5 +11,5 @@ fn main() {
 
     let _unused_variable = 3u32;
 
-    let noisy_unused_variable = 2u32;
+    let _noisy_unused_variable = 2u32;
 }