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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.import type { Comparator, Range } from "./types.ts";import { OPERATORS } from "./_constants.ts";import { ALL, NONE } from "./constants.ts";import { isSemVer } from "./is_semver.ts";
function isComparator(value: unknown): value is Comparator {  if (    value === null || value === undefined || Array.isArray(value) ||    typeof value !== "object"  ) return false;  if (value === NONE || value === ALL) return true;  const { operator } = value as Comparator;  return (    (operator === undefined ||      OPERATORS.includes(operator)) &&    isSemVer(value)  );}
/** * Does a deep check on the object to determine if its a valid range. * * Objects with extra fields are still considered valid if they have at * least the correct fields. * * Adds a type assertion if true. * @param value The value to check if its a valid Range * @returns True if its a valid Range otherwise false. */export function isRange(value: unknown): value is Range {  return Array.isArray(value) &&    value.every((r) => Array.isArray(r) && r.every((c) => isComparator(c)));}