Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
Processing...

Test String

Substitution
Processing...

Code Generator

Language

Generated Code

import Foundation let pattern = ###"^\s*@(?<param>\S+)(?<dtwhitespace>\s*)\/\*##DATATYPE\((?>lhapp_owner\.)?(?<datatype>[^)]+)[^ ,]+(?<outparam>\s*OUT)?(?<comma>,?)(?<paramwhitespace>\s*)?(?<paramdoc>--##PARAM @.*)$"### let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines) let testString = ###""" @nInventoryPackID /*##DATATYPE(inventorypack.inventorypackid)<*/INT/*>##*/, --##PARAM @nInventoryPackID The ID of the inventory pack to be reclassifyed @sInventoryPackNo /*##DATATYPE(inventorypack.inventorypackno)<*/NVARCHAR(254)/*>##*/, --##PARAM @sInventoryPackNo The inventory pack number to be reclassifyed (for logging) @nQuantity /*##DATATYPE(inventorypack.quantity)<*/FLOAT/*>##*/, --##PARAM @nQuantity Quantity on the original pack @nNewPartID /*##DATATYPE(inventorypack.partid)<*/INT/*>##*/, --##PARAM @nNewPartID ID of th epart associated with the new pack @sNewInventoryPackNo /*##DATATYPE(inventorypack.inventorypackno)<*/NVARCHAR(254)/*>##*/, --##PARAM @sreclassifyInventoryPackNo The new reclassifyed inventory pack number @nNewInventoryStateID /*##DATATYPE(invstate.invstateid)<*/SMALLINT/*>##*/, --##PARAM @nreclassifyInventoryStateID The state of the new pack @nNewLocationID /*##DATATYPE(inventorypack.locationid)<*/INT/*>##*/, --##PARAM @nNewLocationID The location of the reclassified pack @sFIFONumber /*##DATATYPE(inventorypack.fifonumber)<*/NVARCHAR(254)/*>##*/, --##PARAM @sFIFONumber the fifo number @nLabelRequired /*##DATATYPE(settingsdatatype.datatypetinyint)<*/TINYINT/*>##*/, --##PARAM @nLabelRequired flag to indicate if a label is required to be printed @nPrinterID /*##DATATYPE(lkmachinestageprinter.printerid)<*/TINYINT/*>##*/, --##PARAM @nPrinterID ID of the printer for a label @nNewQuantity /*##DATATYPE(inventorypack.quantity)<*/FLOAT/*>##*/, --##PARAM @nNewQuantity Quantity on the new pack @sComments /*##DATATYPE(comments.comments)<*/NVARCHAR(2000)/*>##*/, --##PARAM @sComments any comments for the new pack @dOpenedDT /*##DATATYPE(inventorypack_.openeddt)<*/DATETIMEOFFSET/*>##*/, --##PARAM @dOpenedDT DATETIMEOFFSET the form was opened @dModifiedDT /*##DATATYPE(settingsdatatype.datatypetimestamp)<*/DATETIMEOFFSET/*>##*/, --##PARAM @dModifiedDT The current plant date/time @nLoginID /*##DATATYPE(lhapp_owner.auditlog.loginid)<*/SMALLINT/*>##*/, --##PARAM @nLoginID The loginID of the user logged on causing this call (1 if via Udi) @nSessionID /*##DATATYPE(lhapp_owner.auditlog.lhsessionid)<*/INT/*>##*/, --##PARAM @nSessionID The IE session ID of the user's log on @nPlantID /*##DATATYPE(lhapp_owner.auditlog.plantid)<*/SMALLINT/*>##*/, --##PARAM @nPlantID The plant ID (used for filtering the audit) @nLangID /*##DATATYPE(lhapp_owner.login.rflanguageid)<*/SMALLINT/*>##*/, --##PARAM @nLangID The language ID to report any errors in @nEntityTransactionLogID /*##DATATYPE(entitytransactionlog.entitytransactionlogid)<*/INT/*>##*/ OUT, --##PARAM @nEntityTransactionLogID The ID of the created entitytransactionlog entry @nParentEntityTransactionLogID /*##DATATYPE(entitytransactionlog.entitytransactionlogid)<*/INT/*>##*/ --##PARAM @nParentEntityTransactionLogID The ID of the entitytransactionlogs parent """### let stringRange = NSRange(location: 0, length: testString.utf16.count) let substitutionString = #"\t${param}${dtwhitespace}IN${outparam}\t\t${datatype}%TYPE${comma}${paramwhitespace}${paramdoc}"# let result = regex.stringByReplacingMatches(in: testString, range: stringRange, withTemplate: substitutionString) print(result)

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression