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

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Source file tidies for 8.30-RC1 release; fix Makefile.am bugs for building 
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1 nigel 41 The perltest program
2     --------------------
4 ph10 456 The perltest.pl script tests Perl's regular expressions; it has the same
5 nigel 41 specification as pcretest, and so can be given identical input, except that
6 ph10 691 input patterns can be followed only by Perl's lower case modifiers and certain
7 ph10 678 other pcretest modifiers that are either handled or ignored:
8 nigel 41
9 ph10 678 /+ 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 ph10 903 /Y ignored
18 ph10 678
19 ph10 868 The pcretest \Y escape in data lines is removed before matching. The data lines
20     are processed as Perl double-quoted strings, so if they contain " $ or @
21     characters, these have to be escaped. For this reason, all such characters in
22     the Perl-compatible testinput1 file are escaped so that they can be used for
23     perltest as well as for pcretest. The special upper case pattern modifiers such
24     as /A that pcretest recognizes, and its special data line escapes, are not used
25     in the Perl-compatible test file. The output should be identical, apart from
26     the initial identifying banner.
27 nigel 41
28 ph10 456 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 ph10 458 and testinput6 files can be fed to perltest to run compatible UTF-8 tests.
31 ph10 871 However, it is necessary to add "use utf8; require Encode" to the script to
32 ph10 903 make this work correctly. I have not managed to find a way to handle this
33 ph10 871 automatically.
34 nigel 49
35 ph10 456 The other testinput files are not suitable for feeding to perltest.pl, since
36     they make use of the special upper case modifiers and escapes that pcretest
37 ph10 871 uses to test certain features of PCRE. Some of these files also contain
38     malformed regular expressions, in order to check that PCRE diagnoses them
39     correctly.
40 nigel 63
41 nigel 77 Philip Hazel
42 ph10 868 January 2012


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