aoc-2023/day_19/parser.ts
2024-12-09 22:41:02 +09:00

40 lines
806 B
TypeScript

import nearly from "npm:nearley";
import "./grammar.js";
// deno-lint-ignore no-explicit-any
const grammar = (globalThis as unknown as any)["grammar"];
const compiled_grammar = nearly.Grammar.fromCompiled(grammar);
export type Quality = "x" | "m" | "a" | "s";
export interface Condition {
quality: Quality;
cond: "<" | ">";
value: number;
}
export interface Rule {
condition: Condition;
dest: string;
}
export interface Workflow {
name: string;
rules: Rule[];
always: string;
}
export type Material = {
[key in Quality]: number;
};
interface Input {
rules: Workflow[];
materials: Material[];
}
export function parseInput(input: string): Input {
const parser = new nearly.Parser(compiled_grammar);
parser.feed(input);
return parser.results[0];
}