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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.import { SemVer } from "./types.ts";import { isValidNumber } from "./_shared.ts";import { isSemVer } from "./is_semver.ts";import { FULL, MAX_LENGTH, NUMERICIDENTIFIER, re, src } from "./_shared.ts";
/** * Attempt to parse a string as a semantic version, returning either a `SemVer` * object or throws a TypeError. * @param version The version string to parse * @returns A valid SemVer */export function parse(version: string | SemVer): SemVer {  if (typeof version === "object") {    if (isSemVer(version)) {      return version;    } else {      throw new TypeError(`not a valid SemVer object`);    }  }  if (typeof version !== "string") {    throw new TypeError(      `version must be a string`,    );  }
  if (version.length > MAX_LENGTH) {    throw new TypeError(      `version is longer than ${MAX_LENGTH} characters`,    );  }
  version = version.trim();
  const r = re[FULL];  const m = version.match(r);  if (!m) {    throw new TypeError(`Invalid Version: ${version}`);  }
  // these are actually numbers  const major = parseInt(m[1]);  const minor = parseInt(m[2]);  const patch = parseInt(m[3]);
  if (major > Number.MAX_SAFE_INTEGER || major < 0) {    throw new TypeError("Invalid major version");  }
  if (minor > Number.MAX_SAFE_INTEGER || minor < 0) {    throw new TypeError("Invalid minor version");  }
  if (patch > Number.MAX_SAFE_INTEGER || patch < 0) {    throw new TypeError("Invalid patch version");  }
  // number-ify any prerelease numeric ids  const numericIdentifier = new RegExp(`^${src[NUMERICIDENTIFIER]}$`);  const prerelease = (m[4] ?? "")    .split(".")    .filter((id) => id)    .map((id: string) => {      const num = parseInt(id);      if (id.match(numericIdentifier) && isValidNumber(num)) {        return num;      } else {        return id;      }    });
  const build = m[5]?.split(".")?.filter((m) => m) ?? [];  return {    major,    minor,    patch,    prerelease,    build,  };}