Xbase++ Requires Chilkat v11.1.0+

Regular Expression Replace Full Matches

See more Regular Expressions Examples

Demonstrates replacing the full matches of a regular expression.

Note: Chilkat uses PCRE2. See PCRE2 Regular Expressions
Also see: PCRE2 Performance

Xbase++

LOCAL nSuccess
LOCAL cSubject
LOCAL cPattern
LOCAL oSb
LOCAL oJson
LOCAL nTimeoutMs
LOCAL nNumMatches
LOCAL oSbTemp
LOCAL i

nSuccess := 0

cSubject := "John Anders, +_+_+ Mary Robins $$$$"
cPattern := "\w+\s+\w+"

oSb := CreateObject("Chilkat.StringBuilder")
oSb:Append(cSubject)

oJson := CreateObject("Chilkat.JsonObject")
oJson:EmitCompact := 0

nTimeoutMs := 2000
nNumMatches := oSb:RegexMatch(cPattern, oJson, nTimeoutMs)
IF (nNumMatches < 0)
    //  Probably an error in the regular expression.
    //  Suggestion: Use AI to help create and/or diagnose regular expressions.
    ? oSb:LastErrorText
    oSb:destroy()
    oJson:destroy()
    RETURN
ENDIF

//  Examine the matches:
? oJson:Emit()

//  {
//    "match": [
//      {
//        "group": [
//          {
//            "cap": "John Anders",
//            "idx": 0,
//            "len": 11
//          }
//        ]
//      },
//      {
//        "group": [
//          {
//            "cap": "Mary Robins",
//            "idx": 19,
//            "len": 11
//          }
//        ]
//      }
//    ]
//  }

oSbTemp := CreateObject("Chilkat.StringBuilder")

i := 0
nNumMatches := oJson:SizeOfArray("match")
DO WHILE i < nNumMatches

    oJson:I := i

    //  The full match is always in group 0.
    oSbTemp:Clear()
    oJson:StringOfSb("match[i].group[0].cap", oSbTemp)

    //  Indicate that we wish to replace the full match with it's value converted to uppercase.
    oSbTemp:ToUppercase()
    oJson:UpdateSb("match[i].group[0].rep", oSbTemp)

    i := i + 1
ENDDO

//  The JSON now has replacement strings:
? oJson:Emit()

//  {
//    "match": [
//      {
//        "group": [
//          {
//            "cap": "John Anders",
//            "idx": 0,
//            "len": 11,
//            "rep": "JOHN ANDERS"
//          }
//        ]
//      },
//      {
//        "group": [
//          {
//            "cap": "Mary Robins",
//            "idx": 19,
//            "len": 11,
//            "rep": "MARY ROBINS"
//          }
//        ]
//      }
//    ]
//  }

//  Call RegexReplace to update the StringBuilder with the replacements.
nSuccess := oSb:RegexReplace(oJson)
IF (nSuccess == 0)
    ? oSb:LastErrorText
    oSb:destroy()
    oJson:destroy()
    oSbTemp:destroy()
    RETURN
ENDIF

? "Result after doing replacements:"
? oSb:GetAsString()

//  Result after doing replacements:
//  JOHN ANDERS, +_+_+ MARY ROBINS $$$$

oSb:destroy()
oJson:destroy()
oSbTemp:destroy()