day 10 part 1 done

.gitignore

@@ -0,0 +1,50 @@
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+#Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+# Swap
+[._]*.s[a-v][a-z]
+!*.svg  # comment out if you don't need vector files
+[._]*.sw[a-p]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
+[._]sw[a-p]
+
+# Session
+Session.vim
+Sessionx.vim
+
+# Temporary
+.netrwhist
+*~
+# Auto-generated tag files
+tags
+# Persistent undo
+[._]*.un~
+.vscode/settings.json
+
+input.txt

2023/Cargo.lock

@@ -2,6 +2,21 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "addr2line"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a30b2e23b9e17a9f90641c7ab1549cd9b44f296d3ccbf309d2863cfe398a0cb"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.2"
@@ -23,6 +38,42 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
+[[package]]
+name = "backtrace"
+version = "0.3.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2089b7e3f35b9dd2d0ed921ead4f6d318c27680d4a5bd167b3ee120edb105837"
+dependencies = [
+ "addr2line",
+ "cc",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bytecount"
+version = "0.6.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1e5f035d16fc623ae5f74981db80a439803888314e3a555fd6f04acd51a3205"
+
+[[package]]
+name = "cc"
+version = "1.0.83"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -40,6 +91,17 @@ dependencies = [
  "nom",
 ]
 
+[[package]]
+name = "day-10"
+version = "2023.0.0"
+dependencies = [
+ "glam",
+ "itertools",
+ "nom",
+ "nom_locate",
+ "rstest",
+]
+
 [[package]]
 name = "day-2"
 version = "2023.0.0"
@@ -87,6 +149,7 @@ dependencies = [
 name = "day-7"
 version = "2023.0.0"
 dependencies = [
+ "dhat",
  "itertools",
  "nom",
  "num",
@@ -122,6 +185,22 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "dhat"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f2aaf837aaf456f6706cb46386ba8dffd4013a757e36f4ea05c20dd46b209a3"
+dependencies = [
+ "backtrace",
+ "lazy_static",
+ "mintex",
+ "parking_lot",
+ "rustc-hash",
+ "serde",
+ "serde_json",
+ "thousands",
+]
+
 [[package]]
 name = "either"
 version = "1.9.0"
@@ -244,6 +323,18 @@ dependencies = [
  "wasi",
 ]
 
+[[package]]
+name = "gimli"
+version = "0.28.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
+
+[[package]]
+name = "glam"
+version = "0.24.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5418c17512bdf42730f9032c74e1ae39afc408745ebb2acf72fbc4691c17945"
+
 [[package]]
 name = "glob"
 version = "0.3.1"
@@ -259,12 +350,34 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itoa"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.150"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "89d92a4743f9a61002fae18374ed11e7973f530cb3a3255fb354818118b2203c"
 
+[[package]]
+name = "lock_api"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c168f8615b12bc01f9c17e2eb0cc07dcae1940121185446edc3744920e8ef45"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.20"
@@ -283,6 +396,25 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
+[[package]]
+name = "miniz_oxide"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7810e0be55b428ada41041c41f32c9f1a42817901b4ccf45fa3d4b6561e74c7"
+dependencies = [
+ "adler",
+]
+
+[[package]]
+name = "mintex"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd7c5ba1c3b5a23418d7bbf98c71c3d4946a0125002129231da8d6b723d559cb"
+dependencies = [
+ "once_cell",
+ "sys-info",
+]
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -293,6 +425,17 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "nom_locate"
+version = "4.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e3c83c053b0713da60c5b8de47fe8e494fe3ece5267b2f23090a07a053ba8f3"
+dependencies = [
+ "bytecount",
+ "memchr",
+ "nom",
+]
+
 [[package]]
 name = "num"
 version = "0.4.1"
@@ -369,6 +512,44 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "object"
+version = "0.32.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9cf5f9dd3933bd50a9e1f149ec995f39ae2c496d31fd772c1fd45ebc27e902b0"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "once_cell"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
+
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c42a9226546d68acdd9c0a280d17ce19bfe27a46bf68784e4066115788d008e"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-targets",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.13"
@@ -435,6 +616,15 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4722d768eff46b75989dd134e5c353f0d6296e5aaa3132e776cbdb56be7731aa"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "regex"
 version = "1.10.2"
@@ -511,6 +701,18 @@ dependencies = [
  "syn 2.0.39",
 ]
 
+[[package]]
+name = "rustc-demangle"
+version = "0.1.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
+
+[[package]]
+name = "rustc-hash"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
+
 [[package]]
 name = "rustc_version"
 version = "0.4.0"
@@ -520,12 +722,55 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f98d2aa92eebf49b69786be48e4477826b256916e84a57ff2a4f21923b48eb4c"
+
+[[package]]
+name = "scopeguard"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
+
 [[package]]
 name = "semver"
 version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
 
+[[package]]
+name = "serde"
+version = "1.0.193"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25dd9975e68d0cb5aa1120c288333fc98731bd1dd12f561e468ea4728c042b89"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.193"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43576ca501357b9b071ac53cdc7da8ef0cbd9493d8df094cd821777ea6e894d3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.39",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.108"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d1c7e3eac408d115102c4c24ad393e0821bb3a5df4d506a80f85f7a742a526b"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -535,6 +780,12 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "smallvec"
+version = "1.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4dccd0940a2dcdf68d092b8cbab7dc0ad8fa938bf95787e1b916b0e3d0e8e970"
+
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -557,6 +808,22 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "sys-info"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b3a0d0aba8bf96a0e1ddfdc352fc53b3df7f39318c71854910c3c4b024ae52c"
+dependencies = [
+ "cc",
+ "libc",
+]
+
+[[package]]
+name = "thousands"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bf63baf9f5039dadc247375c29eb13706706cfde997d0330d05aa63a77d8820"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"
@@ -568,3 +835,60 @@ name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "windows-targets"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "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_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
+
+[[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_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
+
+[[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_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"

2023/Cargo.toml

@@ -14,5 +14,12 @@ error-stack = "0.4.1"
 itertools = "0.12.0"
 log = "0.4.20"
 nom = "7.1.3"
+nom_locate= "4.2.0"
 rstest = "0.18.2"
 rstest_reuse = "0.6.0"
+dhat = "0.3.2"
+
+
+[profile.dhat]
+inherits = "release"
+debug = true

2023/day-10/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "day-10"
+version.workspace = true
+edition.workspace = true
+authors.workspace = true
+repository.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nom.workspace = true
+nom_locate = {workspace = true }
+itertools.workspace = true
+glam = "0.24.2"
+
+[dev-dependencies]
+rstest = {workspace = true}

2023/day-10/src/lib.rs

@@ -0,0 +1,4 @@
+pub mod part1;
+pub use crate::part1::*;
+pub mod part2;
+pub use crate::part2::*;

2023/day-10/src/main.rs

@@ -0,0 +1,12 @@
+#![warn(clippy::all, clippy::pedantic)]
+
+use day_10::part1;
+use day_10::part2;
+
+fn main() {
+    let input = include_str!("./input.txt");
+    let part1_result = part1(input);
+    println!("part 1: {part1_result}");
+    let part2_result = part2(input);
+    println!("part 2: {part2_result}");
+}

2023/day-10/src/part1.rs

@@ -0,0 +1,257 @@
+#![warn(clippy::all, clippy::pedantic)]
+
+use std::{collections::HashMap, iter::successors};
+
+use glam::IVec2;
+use itertools::Itertools;
+use nom::{
+    branch::alt,
+    bytes::complete::tag,
+    character::complete,
+    multi::{fold_many1, many1},
+    sequence::terminated,
+    IResult, Parser, combinator::eof,
+};
+use nom_locate::LocatedSpan;
+
+type Span<'a> = LocatedSpan<&'a str>;
+type SpanIVec2<'a> = LocatedSpan<&'a str, IVec2>;
+
+#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Copy, Clone)]
+enum PipeFrom {
+    Up,
+    Down,
+    Left,
+    Right,
+}
+impl PipeFrom {
+    fn from_ivecs(a: IVec2, b: IVec2) -> Option<Self> {
+        match (a-b).into() {
+            (0, 1) => Some(Self::Down),
+            (0, -1) => Some(Self::Up),
+            (1, 0)  => Some(Self::Right),
+            (-1, 0) => Some(Self::Left),
+            _ => None,
+            //value => unimplemented!("this can't be {a:?} - {b:?} = {value:?}"),
+        }
+    }
+    fn to_ivec(self) -> IVec2 {
+        match self {
+            PipeFrom::Up => (0,-1).into(),
+            PipeFrom::Down => (0,1).into(),
+            PipeFrom::Left => (-1,0).into(),
+            PipeFrom::Right => (1,0).into(),
+        }
+    }
+}
+
+#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Copy, Clone)]
+enum PipeType {
+    // 'S'
+    Start,
+    // '-'
+    Horizontal,
+    // '|'
+    Vertical,
+    // 'F'
+    DownRight,
+    // '7'
+    DownLeft,
+    // 'L'
+    UpRight,
+    // 'J'
+    UpLeft,
+    // '.' -this is so we can parse but should be discarded
+    None,
+}
+
+impl PipeType {
+    fn get_adjacents(self) -> Vec<IVec2> {
+        match self {
+            PipeType::Start => vec![(-1, 0).into(), (0, -1).into(), (0, 1).into(), (1, 0).into()],
+            PipeType::Horizontal => vec![(1, 0).into(), (-1, 0).into()],
+            PipeType::Vertical => vec![(0, 1).into(), (0, -1).into()],
+            PipeType::DownRight => vec![(0, 1).into(), (1, 0).into()],
+            PipeType::DownLeft => vec![(0, 1).into(), (-1, 0).into()],
+            PipeType::UpRight => vec![(0, -1).into(), (1, 0).into()],
+            PipeType::UpLeft => vec![(0, -1).into(), (-1, 0).into()],
+            PipeType::None => unimplemented!("this should never have been called"),
+        }
+    }
+}
+
+#[derive(Debug, Eq, PartialEq)]
+struct Pipe {
+    pub pipe_type: PipeType,
+    pub position: IVec2,
+}
+
+impl Pipe {
+    fn get_adjacent(&self ) -> Vec<(IVec2, PipeFrom)> {
+        self.pipe_type
+            .get_adjacents()
+            .into_iter()
+            .map(|x| x + self.position)
+            .filter_map(|x| PipeFrom::from_ivecs(self.position , x).map(|y| (x,y) ))
+            .collect()
+    }
+    fn next(&self, from: PipeFrom) -> IVec2 {
+        use PipeFrom::*;
+        use PipeType::*;
+        match (from, self.pipe_type) {
+            (Up, Vertical) | (Left, DownLeft) | (Right, DownRight) => Down,
+            (Up, UpLeft) | (Down, DownLeft) | (Right, Horizontal) => Left,
+            (Up, UpRight) | (Down, DownRight) | (Left, Horizontal)  => Right,
+            (Down, Vertical) | (Left, UpLeft) | (Right, UpRight) => Up,
+            _ => unimplemented!("no"),
+        }.to_ivec() + self.position
+    }
+}
+
+/// day 10 part 1 of aoc 2023
+///
+/// # Arguments
+/// - input the input for today's puzzle
+///
+/// # Panics
+/// panics whne it cannot parse the input OR when ever the number of game numbers is greater than
+/// usize
+#[must_use]
+pub fn part1(input: &str) -> String {
+    let input = Span::new(input);
+    let (_, grid) = parse_input(input).expect("aoc always parse");
+    let start_node = grid
+        .values()
+        .find(|x| x.pipe_type == PipeType::Start)
+        .expect("has a start");
+
+    (successors(
+        Some(
+            start_node
+                .get_adjacent()
+                .iter()
+                .filter_map(|(x, from)| grid.get(x).map(|y|(y,*from)))
+                .filter(|(x, _)| x.get_adjacent().iter().map(|(y,_)|y).contains(&start_node.position))
+                .collect::<Vec<_>>()
+        ),
+        |front_nodes| {
+            Some(front_nodes
+                .iter()
+                .filter_map(|(pipe, from)| {
+                    grid.get(&pipe.next(*from)).map(|x|(x,PipeFrom::from_ivecs(pipe.position,x.position ).unwrap()))
+                })
+                .collect::<Vec<_>>())
+        },
+    )
+        .filter(|x| !x.is_empty())
+        .position(|a| a[0].0 == a[1].0)
+        .unwrap()
+        +1)
+    .to_string()
+    //todo!()
+}
+
+fn with_xy(span: Span) -> SpanIVec2 {
+    let x = i32::try_from(span.get_column()).expect("overflow") - 1;
+    let y = i32::try_from(span.location_line()).expect("wrap around") - 1;
+    span.map_extra(|()| IVec2::new(x, y))
+}
+
+fn parse_pipe(input: Span) -> IResult<Span, Pipe> {
+    alt((
+        tag("S").map(with_xy).map(|position| Pipe {
+            pipe_type: PipeType::Start,
+            position: position.extra,
+        }),
+        tag("-").map(with_xy).map(|position| Pipe {
+            pipe_type: PipeType::Horizontal,
+            position: position.extra,
+        }),
+        tag("|").map(with_xy).map(|position| Pipe {
+            pipe_type: PipeType::Vertical,
+            position: position.extra,
+        }),
+        tag("F").map(with_xy).map(|position| Pipe {
+            pipe_type: PipeType::DownRight,
+            position: position.extra,
+        }),
+        tag("7").map(with_xy).map(|position| Pipe {
+            pipe_type: PipeType::DownLeft,
+            position: position.extra,
+        }),
+        tag("L").map(with_xy).map(|position| Pipe {
+            pipe_type: PipeType::UpRight,
+            position: position.extra,
+        }),
+        tag("J").map(with_xy).map(|position| Pipe {
+            pipe_type: PipeType::UpLeft,
+            position: position.extra,
+        }),
+        tag(".").map(with_xy).map(|position| Pipe {
+            pipe_type: PipeType::None,
+            position: position.extra,
+        }),
+    ))(input)
+}
+
+fn parse_input(input: Span) -> IResult<Span, HashMap<IVec2, Pipe>> {
+    fold_many1(
+        terminated(many1(parse_pipe), alt((complete::line_ending, eof))),
+        HashMap::new,
+        |mut acc, x| {
+            x.into_iter()
+                .filter(|x| x.pipe_type != PipeType::None)
+                .for_each(|x| {
+                    acc.insert(x.position, x);
+                });
+            acc
+        },
+    )(input)
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    use rstest::rstest;
+
+    #[rstest]
+    #[case(
+        ".....
+.S-7.
+.|.|.
+.L-J.
+.....",
+        "4"
+    )]
+    #[case(
+        "-L|F7
+7S-7|
+L|7||
+-L-J|
+L|-JF",
+        "4"
+    )]
+    #[case(
+        "..F7.
+.FJ|.
+SJ.L7
+|F--J
+LJ...",
+        "8"
+    )]
+    #[case(
+        "7-F7-
+.FJ|7
+SJLL7
+|F--J
+LJ.LJ",
+        "8"
+    )]
+
+    fn part1_works(#[case] input: &str, #[case] expected: &str) {
+        let result = part1(input);
+        assert_eq!(result, expected);
+    }
+}
+

2023/day-10/src/part2.rs

@@ -0,0 +1,20 @@
+#![warn(clippy::all, clippy::pedantic)]
+
+#[must_use]
+pub fn part2 (_input: &str) -> String {
+    "Not Finished".to_string()
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    const INPUT: &str = "";
+
+    #[test]
+    fn part2_works() {
+        let result = part2(INPUT);
+        assert_eq!(result, "Not Finished".to_string());
+    }
+}
+