Annotation of embedaddon/pcre/doc/perltest.txt, revision 1.1.1.1
1.1 misho 1: The perltest program
2: --------------------
3:
4: 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
6: input patterns can be followed only by Perl's lower case modifiers and certain
7: 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
19: " $ or @ characters, these have to be escaped. For this reason, all such
20: characters in testinput1, testinput4, testinput6, and testinput11 are escaped
21: so that they can be used for perltest as well as for pcretest. The pcretest \Y
22: escape in data lines is removed.
23:
24: The special upper case pattern modifiers such as /A that pcretest recognizes,
25: and its special data line escapes, are not used in these files. The output
26: should be identical, apart from the initial identifying banner.
27:
28: The perltest.pl script can also test UTF-8 features. It recognizes the special
29: 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
43: August 2011
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