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import { assertEquals } from "./deps.ts";
export function vimoption2ts(option: string): string {  let hasDash = false;  const patterns: string[] = [];  for (let pattern of option.split(",")) {    if (pattern.match(/\d+/)) {      pattern = pattern.replaceAll(/\d+/g, (s: string) => {        return String.fromCharCode(parseInt(s, 10));      });    }
    if (pattern == "") {      // ,      if (patterns.indexOf(",") < 0) {        patterns.push(",");      }    } else if (pattern == "@") {      patterns.push("a-zA-Z");    } else if (pattern == "\\") {      patterns.push("\\\\");    } else if (pattern == "-") {      hasDash = true;    } else {      patterns.push(pattern);    }  }
  // Dash must be last.  if (hasDash) {    patterns.push("-");  }
  return patterns.join("");}
Deno.test("vimoption2ts", () => {  assertEquals(vimoption2ts("@,48-57,_,\\"), "a-zA-Z0-9_\\\\");  assertEquals(vimoption2ts("@,-,48-57,_"), "a-zA-Z0-9_-");  assertEquals(vimoption2ts("@,,,48-57,_"), "a-zA-Z,0-9_");  assertEquals(vimoption2ts("@,48-57,_,-,+,\\,!~"), "a-zA-Z0-9_+\\\\!~-");});