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2020: switch to anyhow

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This commit is contained in:
Antoine Martin 2020-12-14 18:08:16 +01:00
parent f148347e5b
commit d91165207f
18 changed files with 161 additions and 179 deletions
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12
aoc2020/src/day03.rs
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@ -3,9 +3,11 @@ use std::iter::FromIterator;
use std::ops::Index;
use std::str::FromStr;
use anyhow::Result;
const INPUT: &str = include_str!("../input/day03.txt");
pub fn run() -> aoc::Result<String> {
pub fn run() -> Result<String> {
let mut res = String::with_capacity(128);
writeln!(res, "part 1: {}", part1(INPUT)?)?;
@ -14,13 +16,13 @@ pub fn run() -> aoc::Result<String> {
Ok(res)
}
fn part1(input: &str) -> aoc::Result<usize> {
fn part1(input: &str) -> Result<usize> {
let forest = input.parse()?;
Ok(count_trees(&forest, (3, 1)))
}
fn part2(input: &str) -> aoc::Result<usize> {
fn part2(input: &str) -> Result<usize> {
let forest = input.parse()?;
let slopes = &[(1, 1), (3, 1), (5, 1), (7, 1), (1, 2)];
@ -89,9 +91,9 @@ impl Index<usize> for Forest {
}
impl FromStr for Forest {
type Err = aoc::Error;
type Err = anyhow::Error;
fn from_str(s: &str) -> aoc::Result<Self> {
fn from_str(s: &str) -> Result<Self> {
let trees = s
.lines()
.map(|line| line.chars().map(|c| matches!(c, '#')).collect())