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day1 part 2 with typo in chumsky parser fixed

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This commit is contained in:
Dominic 2023-12-01 14:13:19 +01:00
parent 9cf3b3ef76
commit 21d44796c7
Signed by: msrd0
GPG key ID: DCC8C247452E98F9
1 changed files with 1 additions and 40 deletions
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41
src/bin/day1.rs
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@ -2,8 +2,6 @@
use aoc23::read;
use chumsky::prelude::*;
use std::{io::{BufReader, BufRead}, fs::File};
use chumsky::chain::Chain;
struct Line {
first_digit: u128,
@ -20,9 +18,8 @@ impl Line {
choice((
// digit combinations (only the relevant ones)
just("oneight").map(|_| array(&[1, 8])),
just("twoone").map(|_| array(&[2, 1])),
just("twone").map(|_| array(&[2, 1])),
just("eightwo").map(|_| array(&[8, 2])),
// single digits
just("one").or(just("1")).map(|_| array(&[1])),
just("two").or(just("2")).map(|_| array(&[2])),
@ -33,7 +30,6 @@ impl Line {
just("seven").or(just("7")).map(|_| array(&[7])),
just("eight").or(just("8")).map(|_| array(&[8])),
just("nine").or(just("9")).map(|_| array(&[9])),
// garbage
none_of(['1', '2', '3', '4', '5', '6', '7', '8', '9', '\n'])
.map(|_| array(&[]))
@ -62,43 +58,8 @@ fn main() -> anyhow::Result<()> {
let sum: u128 = lines
.iter()
.map(|line| line.first_digit * 10 + line.last_digit)
// .map(|number| { eprintln!("{number}"); number })
.sum();
println!("{sum}");
let mut sum: u128 = 0;
for line in BufReader::new(File::open("inputs/day1.txt")?).lines() {
let line = line?;
let line = line.trim();
if line.is_empty() {
continue;
}
let mut digits = Vec::new();
for i in 0 .. line.len() {
let s = &line[i..];
macro_rules! check_digit {
($digit:literal, $string:literal) => {
if s.starts_with(stringify!($digit)) || line[i..].starts_with($string) {
digits.push($digit);
}
}
}
check_digit!(1, "one");
check_digit!(2, "two");
check_digit!(3, "three");
check_digit!(4, "four");
check_digit!(5, "five");
check_digit!(6, "six");
check_digit!(7, "seven");
check_digit!(8, "eight");
check_digit!(9, "nine");
}
sum += digits.first().unwrap() * 10 + digits.last().unwrap();
}
println!("{sum}");
Ok(())
}