import type { Backslash, ErrorMessage, Scanner } from "@ark/util";
import type { parseCharset } from "./charset.ts";
import type { parseEscape } from "./escape.ts";
import type { parseGroup } from "./group.ts";
import type { parseBuiltinQuantifier, parsePossibleRange, QuantifyingChar } from "./quantify.ts";
import type { Anchor, AnchorMarker, s, State, UnionTree } from "./state.ts";
export type parseState<s extends State> = s["unscanned"] extends ErrorMessage ? s["unscanned"] : s["unscanned"] extends "" ? s.finalize<s> : parseState<next<s>>;
export type next<s extends State> = s["unscanned"] extends Scanner.shift<infer lookahead, infer unscanned> ? lookahead extends "." ? s.shiftQuantifiable<s, string, unscanned> : lookahead extends Backslash ? parseEscape<s, unscanned> : lookahead extends "|" ? s.finalizeBranch<s, unscanned> : lookahead extends Anchor ? s.anchor<s, AnchorMarker<lookahead>, unscanned> : lookahead extends "(" ? parseGroup<s, unscanned> : lookahead extends ")" ? s.popGroup<s, unscanned> : lookahead extends QuantifyingChar ? parseBuiltinQuantifier<s, lookahead, unscanned> : lookahead extends "{" ? parsePossibleRange<s, unscanned> : lookahead extends "[" ? parseCharset<s, unscanned> : s.shiftQuantifiable<s, maybeSplitCasing<s["caseInsensitive"], lookahead>, unscanned> : never;
type maybeSplitCasing<caseInsensitive extends boolean, char extends string> = caseInsensitive extends false ? char : Lowercase<char> extends Uppercase<char> ? char : UnionTree<[Lowercase<char>, Capitalize<char>]>;
export {};