/[pcre]/code/trunk/doc/perltest.txt
ViewVC logotype

Diff of /code/trunk/doc/perltest.txt

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 41 by nigel, Sat Feb 24 21:39:17 2007 UTC revision 691 by ph10, Sun Sep 11 14:31:21 2011 UTC
# Line 1  Line 1 
1  The perltest program  The perltest program
2  --------------------  --------------------
3    
4  The perltest program tests Perl's regular expressions; it has the same  The perltest.pl script tests Perl's regular expressions; it has the same
5  specification as pcretest, and so can be given identical input, except that  specification as pcretest, and so can be given identical input, except that
6  input patterns can be followed only by Perl's lower case modifiers and /+ (as  input patterns can be followed only by Perl's lower case modifiers and certain
7  used by pcretest), which is recognized and handled by the program.  other pcretest modifiers that are either handled or ignored:
8    
9      /+   recognized and handled by perltest
10      /++  the second + is ignored
11      /8   recognized and handled by perltest
12      /J   ignored
13      /K   ignored
14      /W   ignored
15      /S   ignored
16      /SS  ignored
17    
18  The data lines are processed as Perl double-quoted strings, so if they contain  The data lines are processed as Perl double-quoted strings, so if they contain
19  " \ $ or @ characters, these have to be escaped. For this reason, all such  " $ or @ characters, these have to be escaped. For this reason, all such
20  characters in testinput1 and testinput3 are escaped so that they can be used  characters in testinput1, testinput4, testinput6, and testinput11 are escaped
21  for perltest as well as for pcretest, and the special upper case modifiers such  so that they can be used for perltest as well as for pcretest. The pcretest \Y
22  as /A that pcretest recognizes are not used in these files. The output should  escape in data lines is removed.
23  be identical, apart from the initial identifying banner.  
24    The special upper case pattern modifiers such as /A that pcretest recognizes,
25  The testinput2 and testinput4 files are not suitable for feeding to perltest,  and its special data line escapes, are not used in these files. The output
26  since they do make use of the special upper case modifiers and escapes that  should be identical, apart from the initial identifying banner.
27  pcretest uses to test some features of PCRE. The first of these files also  
28  contains malformed regular expressions, in order to check that PCRE diagnoses  The perltest.pl script can also test UTF-8 features. It recognizes the special
29  them correctly.  modifier /8 that pcretest uses to invoke UTF-8 functionality. The testinput4
30    and testinput6 files can be fed to perltest to run compatible UTF-8 tests.
31    However, it is necessary to add "use utf8;" to the script to make this work
32    correctly.
33    
34    The testinput11 file contains tests that use features of Perl 5.10, so does not
35    work with Perl 5.8.
36    
37    The other testinput files are not suitable for feeding to perltest.pl, since
38    they make use of the special upper case modifiers and escapes that pcretest
39    uses to test some features of PCRE. Some of these files also contains malformed
40    regular expressions, in order to check that PCRE diagnoses them correctly.
41    
42  Philip Hazel <ph10@cam.ac.uk>  Philip Hazel
43  January 2000  August 2011

Legend:
Removed from v.41  
changed lines
  Added in v.691

  ViewVC Help
Powered by ViewVC 1.1.5