// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.
import { isWildcardComparator } from "./_shared.ts";
function formatNumber(value) {
  if (value === Number.POSITIVE_INFINITY) {
    return "∞";
  } else if (value === Number.NEGATIVE_INFINITY) {
    return "⧞";
  } else {
    return value.toFixed(0);
  }
}
/**
 * Format a SemVer object into a string.
 *
 * If any number is NaN then NaN will be printed.
 *
 * If any number is positive or negative infinity then '∞' or '⧞' will be printed instead.
 *
 * @example Usage
 * ```ts
 * import { format } from "@std/semver/format";
 * import { assertEquals } from "@std/assert/assert-equals";
 *
 * const semver = {
 *   major: 1,
 *   minor: 2,
 *   patch: 3,
 * };
 * assertEquals(format(semver), "1.2.3");
 * ```
 *
 * @param semver The SemVer to format
 * @returns The string representation of a semantic version.
 */ export function format(semver) {
  if (isWildcardComparator(semver)) {
    return "*";
  }
  const major = formatNumber(semver.major);
  const minor = formatNumber(semver.minor);
  const patch = formatNumber(semver.patch);
  const pre = semver.prerelease?.join(".") ?? "";
  const build = semver.build?.join(".") ?? "";
  const primary = `${major}.${minor}.${patch}`;
  const release = [
    primary,
    pre
  ].filter((v)=>v).join("-");
  return [
    release,
    build
  ].filter((v)=>v).join("+");
}
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