/[pcre]/code/trunk/doc/perltest.txt
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Fri Oct 2 08:53:31 2009 UTC (5 years, 10 months ago) by ph10
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Documentation update
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 /+ (as
7 used by pcretest), which is recognized and handled by the program.
8
9 The data lines are processed as Perl double-quoted strings, so if they contain
10 " $ or @ characters, these have to be escaped. For this reason, all such
11 characters in testinput1 and testinput4 are escaped so that they can be used
12 for perltest as well as for pcretest. The special upper case pattern
13 modifiers such as /A that pcretest recognizes, and its special data line
14 escapes, are not used in these files. The output should be identical, apart
15 from the initial identifying banner.
16
17 The perltest.pl script can also test UTF-8 features. It recognizes the special
18 modifier /8 that pcretest uses to invoke UTF-8 functionality. The testinput4
19 file can be fed to perltest to run compatible UTF-8 tests.
20
21 The other testinput files are not suitable for feeding to perltest.pl, since
22 they make use of the special upper case modifiers and escapes that pcretest
23 uses to test some features of PCRE. Some of these files also contains malformed
24 regular expressions, in order to check that PCRE diagnoses them correctly.
25
26 Philip Hazel
27 September 2009

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