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Make parsers more robust

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This commit is contained in:
Bert Peters
2022-12-01 11:28:59 +01:00
parent 85a51b13c1
commit 48594a75e6
2 changed files with 81 additions and 10 deletions
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10
2022/src/day01.rs
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@@ -3,23 +3,19 @@ use std::ops::Add;
use anyhow::Result;
use nom::character::complete::newline;
use nom::combinator::opt;
use nom::multi::fold_many1;
use nom::multi::separated_list0;
use nom::sequence::terminated;
use nom::IResult;
use crate::common::parse_input;
use crate::common::reduce_many1;
fn parse_elf(input: &[u8]) -> IResult<&[u8], i32> {
fold_many1(
terminated(nom::character::complete::i32, newline),
|| 0,
Add::add,
)(input)
reduce_many1(terminated(nom::character::complete::i32, newline), Add::add)(input)
}
fn parse_max(input: &[u8]) -> IResult<&[u8], i32> {
fold_many1(terminated(parse_elf, opt(newline)), || 0, Ord::max)(input)
reduce_many1(terminated(parse_elf, opt(newline)), Ord::max)(input)
}
pub fn part1(input: &[u8]) -> Result<String> {