🐣 making an adventure game

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "kajam_10"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "kajam_10"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/main.rs

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+use std::io::{
+	Write,
+	stdin,
+	stdout,
+};
+
+/// As a dare to myself, I won't use any error-handling crates.
+
+#[derive (Debug)]
+enum GameError {
+	IoError,
+}
+
+impl From <std::io::Error> for GameError {
+	fn from (_: std::io::Error) -> Self {
+		Self::IoError
+	}
+}
+
+type Result <T> = std::result::Result <T, GameError>;
+
+/// Prints a string, naively wrapping at 80-character boundaries
+/// This means a period might be wrapped separate from the sentence it ends
+/// , and frankly I think that's part of the charm.
+
+fn print (mut s: &str) {
+	const COLS: usize = 80;
+	
+	while s.len () > COLS {
+		println! ("{}", &s [0..80]);
+		s = &s [80..];
+	}
+	
+	println! ("{}", s);
+}
+
+fn read_input () -> Result <String> {
+	{
+		let mut stdout = stdout ();
+		stdout.write_all (b"> ")?;
+		stdout.flush ()?;
+	}
+	
+	let mut buffer = String::new ();
+	stdin ().read_line (&mut buffer)?;
+	
+	// I don't know why I need the type annotation here, but I do.
+	let x: &[_] = &['\r', '\n'];
+	let buffer = buffer.trim_end_matches (x).to_string ();
+	
+	Ok (buffer)
+}
+
+#[derive (Debug, PartialEq)]
+enum PlayerAction {
+	Nonsense,
+}
+
+fn parse_input (_s: &str) -> PlayerAction {
+	PlayerAction::Nonsense
+}
+
+fn main () -> Result <()> {
+	print ("Welcome to SEROTONIN DEPOSITORY, the only adventure game ever made.");
+	print ("");
+	print ("You have been consensually kidnapped by a diabolical ADVENTURE GAME ENTHUSIAST and encouraged to solve PUZZLES for their sick PLEASURE. The only winning move is to solve all the PUZZLES.");
+	print ("");
+	print ("Press ENTER if you dare to begin.");
+	
+	let input = read_input ()?;
+	
+	if ! input.is_empty () {
+		print ("That was more than just ENTER but OKAY, overachiever.");
+	}
+	
+	print ("");
+	print ("You are in a small room. In one corner is a TABLE. The door behind you is locked. Obvious exits are a DOOR locked by a KEYPAD, and an EMERGENCY EXIT.");
+	
+	let input = read_input ()?;
+	let _action = parse_input (&input);
+	
+	Ok (())
+}
+
+#[cfg (test)]
+mod test {
+	#[test]
+	fn parse_input () {
+		use super::PlayerAction::*;
+		
+		for (input, expected) in [
+			 ("", Nonsense),
+		].into_iter () {
+			let actual = super::parse_input (input);
+			assert_eq! (actual, expected);
+		}
+	}
+}