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Parsing successfully

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This commit is contained in:
Daniel Flanagan 2023-12-12 10:43:43 -06:00
parent 397a95f2dc
commit 6f1199f3d2
Signed by: lytedev
GPG key ID: 5B2020A0F9921EF4
1 changed files with 3 additions and 4 deletions
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7
2023/rust/src/day5.rs
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@ -3,7 +3,7 @@ use std::collections::HashMap;
extern crate nom; extern crate nom;
use nom::{ use nom::{
branch::alt, branch::alt,
bytes::complete::{tag, take_while}, bytes::complete::{tag, take_until, take_while},
character::complete::{line_ending, newline, space1}, character::complete::{line_ending, newline, space1},
combinator::{map_res, value}, combinator::{map_res, value},
multi::separated_list0, multi::separated_list0,
@ -80,11 +80,10 @@ fn mapping(input: &str) -> IResult<&str, Mapping> {
} }
fn mapping_entry(input: &str) -> IResult<&str, (LayerDir, Vec<Mapping>)> { fn mapping_entry(input: &str) -> IResult<&str, (LayerDir, Vec<Mapping>)> {
// TODO: this is probably confusing my parser since the newline separator would need to lookahead?
let (input, (from, _, to, _)) = tuple((layer, tag("-to-"), layer, tag(" map:\n")))(input)?; let (input, (from, _, to, _)) = tuple((layer, tag("-to-"), layer, tag(" map:\n")))(input)?;
// take while here let (rest, input) = take_until("\n\n")(input)?;
let (input, mappings) = separated_list0(newline, mapping)(input)?; let (input, mappings) = separated_list0(newline, mapping)(input)?;
Ok((input, (LayerDir { from, to }, mappings))) Ok((rest, (LayerDir { from, to }, mappings)))
} }
fn almanac(input: &str) -> IResult<&str, Almanac> { fn almanac(input: &str) -> IResult<&str, Almanac> {