Visual FoxPro 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

Visual FoxPro

LOCAL lnSuccess
LOCAL lcSubject
LOCAL lcPattern
LOCAL loSb
LOCAL loJson
LOCAL lnTimeoutMs
LOCAL lnNumMatches
LOCAL loSbTemp
LOCAL i

lnSuccess = 0

lcSubject = "John Anders, +_+_+ Mary Robins $$$$"
lcPattern = "\w+\s+\w+"

loSb = CreateObject('Chilkat.StringBuilder')
loSb.Append(lcSubject)

loJson = CreateObject('Chilkat.JsonObject')
loJson.EmitCompact = 0

lnTimeoutMs = 2000
lnNumMatches = loSb.RegexMatch(lcPattern,loJson,lnTimeoutMs)
IF (lnNumMatches < 0) THEN
    *  Probably an error in the regular expression.
    *  Suggestion: Use AI to help create and/or diagnose regular expressions.
    ? loSb.LastErrorText
    RELEASE loSb
    RELEASE loJson
    CANCEL
ENDIF

*  Examine the matches:
? loJson.Emit()

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

loSbTemp = CreateObject('Chilkat.StringBuilder')

i = 0
lnNumMatches = loJson.SizeOfArray("match")
DO WHILE i < lnNumMatches

    loJson.I = i

    *  The full match is always in group 0.
    loSbTemp.Clear()
    loJson.StringOfSb("match[i].group[0].cap",loSbTemp)

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

    i = i + 1
ENDDO

*  The JSON now has replacement strings:
? loJson.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.
lnSuccess = loSb.RegexReplace(loJson)
IF (lnSuccess = 0) THEN
    ? loSb.LastErrorText
    RELEASE loSb
    RELEASE loJson
    RELEASE loSbTemp
    CANCEL
ENDIF

? "Result after doing replacements:"
? loSb.GetAsString()

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

RELEASE loSb
RELEASE loJson
RELEASE loSbTemp