macOS NSRegularExpression

│ English (en) │

This article applies to macOS only.

See also: Multiplatform Programming Guide

Regular expressions

T/c

Code Example

Program regex_ex1;

{$mode objfpc}{$H+}
{$modeswitch objectivec2}

Uses
  MacOSAll, CocoaAll, SysUtils;

Var
  srchStr : String;
  patnStr : String;
  myRegex : NSregularExpression;
  matches : NSArray;
  match   : NSTextCheckingResult;
  error   : NSErrorPtr;

Begin
  error   := Nil;
  srchStr := 'I have 43 bags of 60 marbles.';
  patnStr := '\d+';

  myRegex := NSregularExpression.regularExpressionWithPattern_options_error(NSStr(patnStr), NSRegularExpressionOptions(NSRegularExpressionCaseInsensitive), error);

  if(error <> Nil) then
    NSLog(NSStr('Error: %@'), error);

  matches := myRegex.matchesInString_options_range(NSStr(srchStr), 0, NSMakeRange(0, srchStr.Length));

  NSLog(NSStr('Search string: %@'), NSStr(srchStr));
  NSLog(NSStr('Pattern string: %@'), NSStr(patnStr));
  NSLog(NSStr('Number of matches: %lu'), myRegex.numberOfMatchesInString_options_range(NSStr(srchStr), 0, NSMakeRange(0, srchStr.Length)));

  for match in matches do
    NSLog(NSStr('match: %@'), NSStr(srchStr).substringWithRange(match.rangeAtIndex(0)));
End.

The output from running the above code example is:

2021-06-12 21:05:46.335 regex_ex1[26138:232243] Search string: I have 43 bags of 60 marbles.
2021-06-12 21:05:46.336 regex_ex1[26138:232243] Pattern string: \d+
2021-06-12 21:05:46.336 regex_ex1[26138:232243] Number of matches: 2
2021-06-12 21:05:46.336 regex_ex1[26138:232243] match: 43
2021-06-12 21:05:46.336 regex_ex1[26138:232243] match: 60

See also

• Regexpr

External links

• Apple: NSRegularExpression