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Dir : ~/usr/share/node_modules/semver/internal/

Edit File: re.js

const { MAX_SAFE_COMPONENT_LENGTH } = require('./constants')
const debug = require('./debug')
exports = module.exports = {}

// The actual regexps go on exports.re
const re = exports.re = []
const src = exports.src = []
const t = exports.t = {}
let R = 0

const createToken = (name, value, isGlobal) => {
  const index = R++
  debug(index, value)
  t[name] = index
  src[index] = value
  re[index] = new RegExp(value, isGlobal ? 'g' : undefined)
}

// The following Regular Expressions can be used for tokenizing,
// validating, and parsing SemVer version strings.

// ## Numeric Identifier
// A single `0`, or a non-zero digit followed by zero or more digits.

createToken('NUMERICIDENTIFIER', '0|[1-9]\\d*')
createToken('NUMERICIDENTIFIERLOOSE', '[0-9]+')

// ## Non-numeric Identifier
// Zero or more digits, followed by a letter or hyphen, and then zero or
// more letters, digits, or hyphens.

createToken('NONNUMERICIDENTIFIER', '\\d*[a-zA-Z-][a-zA-Z0-9-]*')

// ## Main Version
// Three dot-separated numeric identifiers.

createToken('MAINVERSION', `(${src[t.NUMERICIDENTIFIER]})\\.` +
                   `(${src[t.NUMERICIDENTIFIER]})\\.` +
                   `(${src[t.NUMERICIDENTIFIER]})`)

createToken('MAINVERSIONLOOSE', `(${src[t.NUMERICIDENTIFIERLOOSE]})\\.` +
                        `(${src[t.NUMERICIDENTIFIERLOOSE]})\\.` +
                        `(${src[t.NUMERICIDENTIFIERLOOSE]})`)

// ## Pre-release Version Identifier
// A numeric identifier, or a non-numeric identifier.

createToken('PRERELEASEIDENTIFIER', `(?:${src[t.NUMERICIDENTIFIER]
}|${src[t.NONNUMERICIDENTIFIER]})`)

createToken('PRERELEASEIDENTIFIERLOOSE', `(?:${src[t.NUMERICIDENTIFIERLOOSE]
}|${src[t.NONNUMERICIDENTIFIER]})`)

// ## Pre-release Version
// Hyphen, followed by one or more dot-separated pre-release version
// identifiers.

createToken('PRERELEASE', `(?:-(${src[t.PRERELEASEIDENTIFIER]
}(?:\\.${src[t.PRERELEASEIDENTIFIER]})*))`)

createToken('PRERELEASELOOSE', `(?:-?(${src[t.PRERELEASEIDENTIFIERLOOSE]
}(?:\\.${src[t.PRERELEASEIDENTIFIERLOOSE]})*))`)

// ## Build Metadata Identifier
// Any combination of digits, letters, or hyphens.

createToken('BUILDIDENTIFIER', '[0-9A-Za-z-]+')

// ## Build Metadata
// Plus sign, followed by one or more period-separated build metadata
// identifiers.

createToken('BUILD', `(?:\\+(${src[t.BUILDIDENTIFIER]
}(?:\\.${src[t.BUILDIDENTIFIER]})*))`)

// ## Full Version String
// A main version, followed optionally by a pre-release version and
// build metadata.

// Note that the only major, minor, patch, and pre-release sections of
// the version string are capturing groups.  The build metadata is not a
// capturing group, because it should not ever be used in version
// comparison.

createToken('FULLPLAIN', `v?${src[t.MAINVERSION]
}${src[t.PRERELEASE]}?${
  src[t.BUILD]}?`)

createToken('FULL', `^${src[t.FULLPLAIN]}$`)

// like full, but allows v1.2.3 and =1.2.3, which people do sometimes.
// also, 1.0.0alpha1 (prerelease without the hyphen) which is pretty
// common in the npm registry.
createToken('LOOSEPLAIN', `[v=\\s]*${src[t.MAINVERSIONLOOSE]
}${src[t.PRERELEASELOOSE]}?${
  src[t.BUILD]}?`)

createToken('LOOSE', `^${src[t.LOOSEPLAIN]}$`)

createToken('GTLT', '((?:<|>)?=?)')

// Something like "2.*" or "1.2.x".
// Note that "x.x" is a valid xRange identifer, meaning "any version"
// Only the first item is strictly required.
createToken('XRANGEIDENTIFIERLOOSE', `${src[t.NUMERICIDENTIFIERLOOSE]}|x|X|\\*`)
createToken('XRANGEIDENTIFIER', `${src[t.NUMERICIDENTIFIER]}|x|X|\\*`)

createToken('XRANGEPLAIN', `[v=\\s]*(${src[t.XRANGEIDENTIFIER]})` +
                   `(?:\\.(${src[t.XRANGEIDENTIFIER]})` +
                   `(?:\\.(${src[t.XRANGEIDENTIFIER]})` +
                   `(?:${src[t.PRERELEASE]})?${
                     src[t.BUILD]}?` +
                   `)?)?`)

createToken('XRANGEPLAINLOOSE', `[v=\\s]*(${src[t.XRANGEIDENTIFIERLOOSE]})` +
                        `(?:\\.(${src[t.XRANGEIDENTIFIERLOOSE]})` +
                        `(?:\\.(${src[t.XRANGEIDENTIFIERLOOSE]})` +
                        `(?:${src[t.PRERELEASELOOSE]})?${
                          src[t.BUILD]}?` +
                        `)?)?`)

createToken('XRANGE', `^${src[t.GTLT]}\\s*${src[t.XRANGEPLAIN]}$`)
createToken('XRANGELOOSE', `^${src[t.GTLT]}\\s*${src[t.XRANGEPLAINLOOSE]}$`)

// Coercion.
// Extract anything that could conceivably be a part of a valid semver
createToken('COERCE', `${'(^|[^\\d])' +
              '(\\d{1,'}${MAX_SAFE_COMPONENT_LENGTH}})` +
              `(?:\\.(\\d{1,${MAX_SAFE_COMPONENT_LENGTH}}))?` +
              `(?:\\.(\\d{1,${MAX_SAFE_COMPONENT_LENGTH}}))?` +
              `(?:$|[^\\d])`)
createToken('COERCERTL', src[t.COERCE], true)

// Tilde ranges.
// Meaning is "reasonably at or greater than"
createToken('LONETILDE', '(?:~>?)')

createToken('TILDETRIM', `(\\s*)${src[t.LONETILDE]}\\s+`, true)
exports.tildeTrimReplace = '$1~'

createToken('TILDE', `^${src[t.LONETILDE]}${src[t.XRANGEPLAIN]}$`)
createToken('TILDELOOSE', `^${src[t.LONETILDE]}${src[t.XRANGEPLAINLOOSE]}$`)

// Caret ranges.
// Meaning is "at least and backwards compatible with"
createToken('LONECARET', '(?:\\^)')

createToken('CARETTRIM', `(\\s*)${src[t.LONECARET]}\\s+`, true)
exports.caretTrimReplace = '$1^'

createToken('CARET', `^${src[t.LONECARET]}${src[t.XRANGEPLAIN]}$`)
createToken('CARETLOOSE', `^${src[t.LONECARET]}${src[t.XRANGEPLAINLOOSE]}$`)

// A simple gt/lt/eq thing, or just "" to indicate "any version"
createToken('COMPARATORLOOSE', `^${src[t.GTLT]}\\s*(${src[t.LOOSEPLAIN]})$|^$`)
createToken('COMPARATOR', `^${src[t.GTLT]}\\s*(${src[t.FULLPLAIN]})$|^$`)

// An expression to strip any whitespace between the gtlt and the thing
// it modifies, so that `> 1.2.3` ==> `>1.2.3`
createToken('COMPARATORTRIM', `(\\s*)${src[t.GTLT]
}\\s*(${src[t.LOOSEPLAIN]}|${src[t.XRANGEPLAIN]})`, true)
exports.comparatorTrimReplace = '$1$2$3'

// Something like `1.2.3 - 1.2.4`
// Note that these all use the loose form, because they'll be
// checked against either the strict or loose comparator form
// later.
createToken('HYPHENRANGE', `^\\s*(${src[t.XRANGEPLAIN]})` +
                   `\\s+-\\s+` +
                   `(${src[t.XRANGEPLAIN]})` +
                   `\\s*$`)

createToken('HYPHENRANGELOOSE', `^\\s*(${src[t.XRANGEPLAINLOOSE]})` +
                        `\\s+-\\s+` +
                        `(${src[t.XRANGEPLAINLOOSE]})` +
                        `\\s*$`)

// Star ranges basically just allow anything at all.
createToken('STAR', '(<|>)?=?\\s*\\*')
// >=0.0.0 is like a star
createToken('GTE0', '^\\s*>=\\s*0\.0\.0\\s*$')
createToken('GTE0PRE', '^\\s*>=\\s*0\.0\.0-0\\s*$')