Stub for 2023-01

Author: Matthew Judy

Sources/2023/01/Trebuchet.swift

@@ -0,0 +1,89 @@
+//
+//  Trebuchet.swift
+//
+//  Created by Matthew Judy on 2023-12-04.
+//
+
+
+import ArgumentParser
+import Foundation
+import Shared
+
+
+/**
+ Day 1 : Trebuchet?!
+
+ # Part One
+
+ Something is wrong with global snow production, and you've been selected to
+ take a look. The Elves have even given you a map; on it, they've used stars
+ to mark the top fifty locations that are likely to be having problems.
+
+ You've been doing this long enough to know that to restore snow operations,
+ you need to check all **fifty stars** by December 25th.
+
+ Collect stars by solving puzzles. Two puzzles will be made available on each
+ day in the Advent calendar; the second puzzle is unlocked when you complete
+ the first. Each puzzle grants **one star**. Good luck!
+
+ You try to ask why they can't just use a weather machine ("not powerful
+ enough") and where they're even sending you ("the sky") and why your map looks
+ mostly blank ("you sure ask a lot of questions") and hang on did you just say
+ the sky ("of course, where do you think snow comes from") when you realize
+ that the Elves are already loading you into a trebuchet ("please hold still,
+ we need to strap you in").
+
+ As they're making the final adjustments, they discover that their calibration
+ document (your puzzle input) has been **amended** by a very young Elf who was
+ apparently just excited to show off her art skills. Consequently, the Elves
+ are having trouble reading the values on the document.
+
+ The newly-improved calibration document consists of lines of text; each line
+ originally contained a specific **calibration value** that the Elves now need
+ to recover. On each line, the calibration value can be found by combining
+ the **first digit** and the **last digit** (in that order) to form a single
+ **two-digit number**.
+
+ For example:
+
+ ```
+ 1abc2
+ pqr3stu8vwx
+ a1b2c3d4e5f
+ treb7uchet
+ ```
+
+ In this example, the calibration values of these four lines are `12`, `38`,
+ `15`, and `77`. Adding these together produces `142`.
+
+ Consider your entire calibration document. **What is the sum of all of the
+ calibration values?**
+ */
+@main
+struct Trebuchet: AsyncParsableCommand
+{
+    /// Enumeration for argument which activates "Part Two" behavior
+    enum Mode: String, ExpressibleByArgument, CaseIterable
+    {
+        case modeA
+        case modeB
+    }
+
+    @Option(help: "<#Argument used to activate “Part Two” behavior.#>")
+    var mode: Mode
+}
+
+
+// MARK: - Command Execution
+
+extension Trebuchet
+{
+    mutating func run() async throws
+    {
+        while let inputLine = readLine()
+        {
+            print("\(inputLine)")
+        }
+    }
+}
+