Merge e59c65cf45 into 2a725fb137

Cargo.lock

@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "anstream"
-version = "0.6.15"
+version = "0.6.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64e15c1ab1f89faffbf04a634d5e1962e9074f2741eef6d97f3c4e322426d526"
+checksum = "23a1e53f0f5d86382dafe1cf314783b2044280f406e7e1506368220ad11b1338"
 dependencies = [
  "anstyle",
  "anstyle-parse",
@@ -19,43 +19,43 @@ dependencies = [
 
 [[package]]
 name = "anstyle"
-version = "1.0.8"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bec1de6f59aedf83baf9ff929c98f2ad654b97c9510f4e70cf6f661d49fd5b1"
+checksum = "8365de52b16c035ff4fcafe0092ba9390540e3e352870ac09933bebcaa2c8c56"
 
 [[package]]
 name = "anstyle-parse"
-version = "0.2.5"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb47de1e80c2b463c735db5b217a0ddc39d612e7ac9e2e96a5aed1f57616c1cb"
+checksum = "3b2d16507662817a6a20a9ea92df6652ee4f94f914589377d69f3b21bc5798a9"
 dependencies = [
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle-query"
-version = "1.1.1"
+version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6d36fc52c7f6c869915e99412912f22093507da8d9e942ceaf66fe4b7c14422a"
+checksum = "79947af37f4177cfead1110013d678905c37501914fba0efea834c3fe9a8d60c"
 dependencies = [
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
 name = "anstyle-wincon"
-version = "3.0.4"
+version = "3.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5bf74e1b6e971609db8ca7a9ce79fd5768ab6ae46441c572e46cf596f59e57f8"
+checksum = "2109dbce0e72be3ec00bed26e6a7479ca384ad226efdd66db8fa2e3a38c83125"
 dependencies = [
  "anstyle",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
 name = "anyhow"
-version = "1.0.89"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86fdf8605db99b54d3cd748a44c6d04df638eb5dafb219b135d0149bd0db01f6"
+checksum = "c042108f3ed77fd83760a5fd79b53be043192bb3b9dba91d8c574c0ada7850c8"
 
 [[package]]
 name = "autocfg"
@@ -123,9 +123,9 @@ checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
 
 [[package]]
 name = "colorchoice"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3fd119d74b830634cea2a0f58bbd0d54540518a14397557951e79340abc28c0"
+checksum = "5b63caa9aa9397e2d9480a9b13673856c78d8ac123288526c37d7839f2a86990"
 
 [[package]]
 name = "crossterm"
@@ -135,7 +135,7 @@ checksum = "829d955a0bb380ef178a640b91779e3987da38c9aea133b20614cfed8cdea9c6"
 dependencies = [
  "bitflags 2.6.0",
  "crossterm_winapi",
- "mio 1.0.2",
+ "mio",
  "parking_lot",
  "rustix",
  "signal-hook",
@@ -225,9 +225,9 @@ dependencies = [
 
 [[package]]
 name = "inotify"
-version = "0.9.6"
+version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8069d3ec154eb856955c1c0fbffefbf5f3c40a104ec912d4797314c1801abff"
+checksum = "fdd168d97690d0b8c412d6b6c10360277f4d7ee495c5d0d5d5fe0854923255cc"
 dependencies = [
  "bitflags 1.3.2",
  "inotify-sys",
@@ -243,6 +243,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0242819d153cba4b4b05a5a8f2a7e9bbf97b6055b2a002b395c96b5ff3c0222"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.1"
@@ -277,9 +286,9 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.160"
+version = "0.2.161"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0b21006cd1874ae9e650973c565615676dc4a274c965bb0a73796dac838ce4f"
+checksum = "8e9489c2807c139ffd9c1794f4af0ebe86a828db53ecdc7fea2111d0fed085d1"
 
 [[package]]
 name = "libredox"
@@ -320,18 +329,6 @@ version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
-[[package]]
-name = "mio"
-version = "0.8.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4a650543ca06a924e8b371db273b2756685faae30f8487da1b56505a8f78b0c"
-dependencies = [
- "libc",
- "log",
- "wasi",
- "windows-sys 0.48.0",
-]
-
 [[package]]
 name = "mio"
 version = "1.0.2"
@@ -347,9 +344,9 @@ dependencies = [
 
 [[package]]
 name = "notify"
-version = "6.1.1"
+version = "7.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6205bd8bb1e454ad2e27422015fb5e4f2bcc7e08fa8f27058670d208324a4d2d"
+checksum = "c533b4c39709f9ba5005d8002048266593c1cfaf3c5f0739d5b8ab0c6c504009"
 dependencies = [
  "bitflags 2.6.0",
  "filetime",
@@ -358,9 +355,19 @@ dependencies = [
  "kqueue",
  "libc",
  "log",
- "mio 0.8.11",
+ "mio",
+ "notify-types",
  "walkdir",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "notify-types"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7393c226621f817964ffb3dc5704f9509e107a8b024b489cc2c1b217378785df"
+dependencies = [
+ "instant",
 ]
 
 [[package]]
@@ -399,14 +406,14 @@ dependencies = [
  "libc",
  "redox_syscall",
  "smallvec",
- "windows-targets 0.52.6",
+ "windows-targets",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.88"
+version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c3a7fc5db1e57d5a779a352c8cdb57b29aa4c40cc69c3a68a7fedc815fbf2f9"
+checksum = "f139b0662de085916d1fb67d2b4169d1addddda1919e696f3252b740b629986e"
 dependencies = [
  "unicode-ident",
 ]
@@ -431,9 +438,9 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.38.37"
+version = "0.38.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8acb788b847c24f28525660c4d7758620a7210875711f79e7f663cc152726811"
+checksum = "aa260229e6538e52293eeb577aabd09945a09d6d9cc0fc550ed7529056c2e32a"
 dependencies = [
  "bitflags 2.6.0",
  "errno",
@@ -491,18 +498,18 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "serde"
-version = "1.0.210"
+version = "1.0.214"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8e3592472072e6e22e0a54d5904d9febf8508f65fb8552499a1abc7d1078c3a"
+checksum = "f55c3193aca71c12ad7890f1785d2b73e1b9f63a0bbc353c08ef26fe03fc56b5"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.210"
+version = "1.0.214"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "243902eda00fad750862fc144cea25caca5e20d615af0a81bee94ca738f1df1f"
+checksum = "de523f781f095e28fa605cdce0f8307e451cc0fd14e2eb4cd2e98a355b147766"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -511,9 +518,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.128"
+version = "1.0.132"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ff5456707a1de34e7e37f2a6fd3d3f808c318259cbd01ab6377795054b483d8"
+checksum = "d726bfaff4b320266d395898905d0eba0345aae23b54aee3a737e260fd46db03"
 dependencies = [
  "itoa",
  "memchr",
@@ -547,7 +554,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34db1a06d485c9142248b7a054f034b349b212551f3dfd19c94d45a754a217cd"
 dependencies = [
  "libc",
- "mio 1.0.2",
+ "mio",
  "signal-hook",
 ]
 
@@ -574,9 +581,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "syn"
-version = "2.0.79"
+version = "2.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89132cd0bf050864e1d38dc3bbc07a0eb8e7530af26344d3d2bbbef83499f590"
+checksum = "5023162dfcd14ef8f32034d8bcd4cc5ddc61ef7a247c024a33e24e1f24d21b56"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -677,22 +684,13 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows-sys"
-version = "0.48.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
-dependencies = [
- "windows-targets 0.48.5",
-]
-
 [[package]]
 name = "windows-sys"
 version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
 dependencies = [
- "windows-targets 0.52.6",
+ "windows-targets",
 ]
 
 [[package]]
@@ -701,22 +699,7 @@ version = "0.59.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
 dependencies = [
- "windows-targets 0.52.6",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
-dependencies = [
- "windows_aarch64_gnullvm 0.48.5",
- "windows_aarch64_msvc 0.48.5",
- "windows_i686_gnu 0.48.5",
- "windows_i686_msvc 0.48.5",
- "windows_x86_64_gnu 0.48.5",
- "windows_x86_64_gnullvm 0.48.5",
- "windows_x86_64_msvc 0.48.5",
+ "windows-targets",
 ]
 
 [[package]]
@@ -725,46 +708,28 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
- "windows_aarch64_gnullvm 0.52.6",
- "windows_aarch64_msvc 0.52.6",
- "windows_i686_gnu 0.52.6",
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
  "windows_i686_gnullvm",
- "windows_i686_msvc 0.52.6",
- "windows_x86_64_gnu 0.52.6",
- "windows_x86_64_gnullvm 0.52.6",
- "windows_x86_64_msvc 0.52.6",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
 ]
 
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
-
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
-
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
-[[package]]
-name = "windows_i686_gnu"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
-
 [[package]]
 name = "windows_i686_gnu"
 version = "0.52.6"
@@ -777,48 +742,24 @@ version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
-[[package]]
-name = "windows_i686_msvc"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
-
 [[package]]
 name = "windows_i686_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
-[[package]]
-name = "windows_x86_64_gnu"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
-
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
-[[package]]
-name = "windows_x86_64_gnullvm"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
-
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
-[[package]]
-name = "windows_x86_64_msvc"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
-
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.52.6"

Cargo.toml

@@ -19,7 +19,7 @@ edition = "2021" # On Update: Update the edition of the `rustfmt` command that c
 rust-version = "1.80"
 
 [workspace.dependencies]
-serde = { version = "1.0.210", features = ["derive"] }
+serde = { version = "1.0.214", features = ["derive"] }
 toml_edit = { version = "0.22.22", default-features = false, features = ["parse", "serde"] }
 
 [package]
@@ -46,18 +46,18 @@ include = [
 ]
 
 [dependencies]
-anyhow = "1.0.89"
+anyhow = "1.0.91"
 clap = { version = "4.5.20", features = ["derive"] }
 crossterm = { version = "0.28.1", default-features = false, features = ["windows", "events"] }
-notify = { version = "6.1.1", default-features = false, features = ["macos_fsevent"] }
+notify = "7.0.0"
 os_pipe = "1.2.1"
 rustlings-macros = { path = "rustlings-macros", version = "=6.3.0" }
-serde_json = "1.0.128"
+serde_json = "1.0.132"
 serde.workspace = true
 toml_edit.workspace = true
 
 [target.'cfg(not(windows))'.dependencies]
-rustix = { version = "0.38.37", default-features = false, features = ["std", "stdio", "termios"] }
+rustix = { version = "0.38.38", default-features = false, features = ["std", "stdio", "termios"] }
 
 [dev-dependencies]
 tempfile = "3.13.0"

dev/Cargo.toml

@@ -26,6 +26,8 @@ bin = [
   { name = "functions4_sol", path = "../solutions/02_functions/functions4.rs" },
   { name = "functions5", path = "../exercises/02_functions/functions5.rs" },
   { name = "functions5_sol", path = "../solutions/02_functions/functions5.rs" },
+  { name = "functions6", path = "../exercises/02_functions/functions6.rs" },
+  { name = "functions6_sol", path = "../solutions/02_functions/functions6.rs" },
   { name = "if1", path = "../exercises/03_if/if1.rs" },
   { name = "if1_sol", path = "../solutions/03_if/if1.rs" },
   { name = "if2", path = "../exercises/03_if/if2.rs" },
@@ -60,6 +62,8 @@ bin = [
   { name = "move_semantics4_sol", path = "../solutions/06_move_semantics/move_semantics4.rs" },
   { name = "move_semantics5", path = "../exercises/06_move_semantics/move_semantics5.rs" },
   { name = "move_semantics5_sol", path = "../solutions/06_move_semantics/move_semantics5.rs" },
+  { name = "move_semantics6", path = "../exercises/06_move_semantics/move_semantics6.rs" },
+  { name = "move_semantics6_sol", path = "../solutions/06_move_semantics/move_semantics6.rs" },
   { name = "structs1", path = "../exercises/07_structs/structs1.rs" },
   { name = "structs1_sol", path = "../solutions/07_structs/structs1.rs" },
   { name = "structs2", path = "../exercises/07_structs/structs2.rs" },

exercises/02_functions/README.md

@@ -1,8 +1,9 @@
 # Functions
 
 Here, you'll learn how to write functions and how the Rust compiler can help you debug errors even
-in more complex code.
+in more complex code. You will also learn what is the difference with closures.
 
 ## Further information
 
 - [How Functions Work](https://doc.rust-lang.org/book/ch03-03-how-functions-work.html)
+- [Closures](https://doc.rust-lang.org/book/ch13-01-closures.html)

exercises/02_functions/functions6.rs

@@ -0,0 +1,19 @@
+// functions6.rs
+//
+// Here you can practice special functions called `closures`, that can capture
+// variables of their parent context.
+// Fix the code below to make it compile, without changing the two closure
+// definitions.
+//
+// Execute `rustlings hint functions6` or use the `hint` watch subcommand for
+// some hints.
+
+fn main() {
+  // TODO: ensure the definition of captured variable
+  let closure_1 = |input_var: u32| -> u32 {input_var + outer_var};
+  println!("Closure#1 returns {}", closure_1(5));
+
+  let closure_2 = |input_var| println!("Closure#2 (input_var {})", input_var);
+  closure_2(2);
+  closure_2("5"); // TODO: look at the captured variable type here
+}

exercises/06_move_semantics/move_semantics6.rs

@@ -0,0 +1,25 @@
+// move_semantics6.rs
+//
+// Here you will practice how mutable/immutable borrowing works in the context
+// of a closure.
+//
+// Try to fix this code to make it compile and not panic.
+// You can't change anything except removing 1 line.
+//
+// Execute `rustlings hint move_semantics7` or use the `hint` watch subcommand
+// for a hint.
+
+fn main() {
+  let mut counter = 0;
+
+  let mut increment = || {
+    counter += 1;
+    println!("counter equals {}", counter);
+  };
+
+  increment();
+  let _reborrowed_counter = &counter; // TODO: figure out where to put this borrowing instruction
+  increment();
+
+  assert_eq!(counter, 2);
+}

exercises/README.md

@@ -3,7 +3,7 @@
 | Exercise               | Book Chapter        |
 | ---------------------- | ------------------- |
 | variables              | §3.1                |
-| functions              | §3.3                |
+| functions              | §3.3, §13.1         |
 | if                     | §3.5                |
 | primitive_types        | §3.2, §4.3          |
 | vecs                   | §8.1                |

rustlings-macros/info.toml

@@ -187,6 +187,20 @@ There are two solutions:
 1. Add the `return` keyword before `num * num;`
 2. Remove the semicolon `;` after `num * num`"""
 
+[[exercises]]
+name = "functions6"
+dir = "02_functions"
+test = false
+hint = """
+Hint FIX #1: Closures can capture variables defined in the outer context.
+
+Hint FIX #2: Closures can infer both input and returned types, when they are not
+specified in the signature. But the closure cannot be reused with different
+input types.
+
+Read more about closures in the rust book dedicated section:
+https://doc.rust-lang.org/book/ch13-01-closures.html"""
+
 # IF
 
 [[exercises]]
@@ -391,6 +405,18 @@ The first problem is that `get_char` is taking ownership of the string. So
 Once you've fixed that, `string_uppercase`'s function signature will also need
 to be adjusted."""
 
+[[exercises]]
+name = "move_semantics6"
+dir = "06_move_semantics"
+test = false
+hint = """
+When a closure captures a variable to modify it, it actually borrows that variable
+as a mutable reference. In this exercise, the closure mutably borrows the `counter`
+variable, thus, any attempt to borrow `counter` between closure calls leads to an error.
+
+You cannot immutably borrow a variable if a mutable closure is
+called later in the scope."""
+
 # STRUCTS
 
 [[exercises]]

solutions/02_functions/functions6.rs

@@ -0,0 +1,9 @@
+fn main() {
+    let outer_var = 1;
+    let closure_1 = |input_var: u32| -> u32 { input_var + outer_var };
+    println!("Closure#1 returns {}", closure_1(5));
+
+    let closure_2 = |input_var| println!("Closure#2 (input_var {})", input_var);
+    closure_2(2);
+    closure_2(5);
+}

solutions/06_move_semantics/move_semantics6.rs

@@ -0,0 +1,14 @@
+fn main() {
+    let mut counter = 0;
+
+    let mut increment = || {
+        counter += 1;
+        println!("counter equals {}", counter);
+    };
+
+    increment();
+    increment();
+    let _reborrowed_counter = &counter;
+
+    assert_eq!(counter, 2);
+}

src/watch/state.rs

@@ -177,39 +177,25 @@ impl<'a> WatchState<'a> {
             stdout.write_all(b" / ")?;
         }
 
-        if self.manual_run {
+        let mut show_key = |key, postfix| {
             stdout.queue(SetAttribute(Attribute::Bold))?;
-            stdout.write_all(b"r")?;
+            stdout.write_all(&[key])?;
             stdout.queue(ResetColor)?;
-            stdout.write_all(b":run / ")?;
+            stdout.write_all(postfix)
+        };
+
+        if self.manual_run {
+            show_key(b'r', b":run / ")?;
         }
 
         if !self.show_hint {
-            stdout.queue(SetAttribute(Attribute::Bold))?;
-            stdout.write_all(b"h")?;
-            stdout.queue(ResetColor)?;
-            stdout.write_all(b":hint / ")?;
+            show_key(b'h', b":hint / ")?;
         }
 
-        stdout.queue(SetAttribute(Attribute::Bold))?;
-        stdout.write_all(b"l")?;
-        stdout.queue(ResetColor)?;
-        stdout.write_all(b":list / ")?;
-
-        stdout.queue(SetAttribute(Attribute::Bold))?;
-        stdout.write_all(b"c")?;
-        stdout.queue(ResetColor)?;
-        stdout.write_all(b":check all / ")?;
-
-        stdout.queue(SetAttribute(Attribute::Bold))?;
-        stdout.write_all(b"x")?;
-        stdout.queue(ResetColor)?;
-        stdout.write_all(b":reset / ")?;
-
-        stdout.queue(SetAttribute(Attribute::Bold))?;
-        stdout.write_all(b"q")?;
-        stdout.queue(ResetColor)?;
-        stdout.write_all(b":quit ? ")?;
+        show_key(b'l', b":list / ")?;
+        show_key(b'c', b":check all / ")?;
+        show_key(b'x', b":reset / ")?;
+        show_key(b'q', b":quit ? ")?;
 
         stdout.flush()
     }