IsMatch Method (REGEX)

The IsMatch method is used to check for a matching substring using the stored regular expression in the associated PL/B REGEX object. This method uses the following format:

Where:

label

Optional. A Program Execution Label.

object

Required. A REGEX object previously declared.

return

Optional. A Numeric Variable that returns one when a match found or zero otherwise.

text

Required. A Character String Variable or literal that specifies the text to examine.

options

Optional. A decimal number or Numeric Variable that has a bit mask value described below.

Flags Affected: EOS, OVER, ZERO

Notes:

1. The ZERO flag is set to TRUE if the 'return' value is zero, otherwise the ZERO flag is set to FALSE.

2. The OVER flag is set TRUE if the 'return' variable is too small and cannot contain the 'return' value without being truncated. Otherwise, the OVER flag is set to FALSE.

3. The EOS flag is always cleared.

4. The {text} parameter contains the character string to be searched.

5. The search pattern used is the currently compiled pattern.

6. The {return} value is one when a match found or zero otherwise.

7. A zero-length match counts as a match.

8. If no matches are found the GetMatch method will return an empty string.

9. If a match is found the GetMatch method will return the match found.

10. The {options} bit mask values found in plbmeth.inc are defined as follows:

 

Equate	Value	Description
$REGEX_OPT_NOCASE	1	Case-insensitive (ASCII A-Z only)
$REGEX_OPT_MULTILINE	8	^ and $ also match at line breaks
$REGEX_OPT_DOTALL	16	. also matches CR and LF
$REGEX_OPT_NOTEMPTY	32	Reject empty (zero-length) matches

11. The {options} given to Compile method also apply.

Example 1:

      RegEx1.Compile Giving N Using "Alice"

      RegEx1.IsMatch Giving N Using "This is Alice"

See Also: Method Syntax, REGEX, Regular Expression Support