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-The perltest program
---------------------
-
-The perltest program tests Perl's regular expressions; it has the same
-specification as pcretest, and so can be given identical input, except that
-input patterns can be followed only by Perl's lower case modifiers and /+ (as
-used by pcretest), which is recognized and handled by the program.
-
-The data lines are processed as Perl double-quoted strings, so if they contain
-" \ $ or @ characters, these have to be escaped. For this reason, all such
-characters in testinput1 and testinput3 are escaped so that they can be used
-for perltest as well as for pcretest, and the special upper case modifiers such
-as /A that pcretest recognizes are not used in these files. The output should
-be identical, apart from the initial identifying banner.
-
-For testing UTF-8 features, an alternative form of perltest, called perltest8,
-is supplied. This requires Perl 5.6 or higher. It recognizes the special
-modifier /8 that pcretest uses to invoke UTF-8 functionality. The testinput5
-file can be fed to perltest8.
-
-The testinput2 and testinput4 files are not suitable for feeding to perltest,
-since they do make use of the special upper case modifiers and escapes that
-pcretest uses to test some features of PCRE. The first of these files also
-contains malformed regular expressions, in order to check that PCRE diagnoses
-them correctly. Similarly, testinput6 tests UTF-8 features that do not relate
-to Perl.
-
-Philip Hazel <ph10@cam.ac.uk>
-August 2000