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The perltest program |
The perltest program |
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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 |
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specification as pcretest, and so can be given identical input, except that |
specification as pcretest, and so can be given identical input, except that |
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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 |
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used by pcretest), which is recognized and handled by the program. |
other pcretest modifiers that are either handled or ignored: |
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/+ recognized and handled by perltest |
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/++ the second + is ignored |
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/8 recognized and handled by perltest |
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/J ignored |
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/K ignored |
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/W ignored |
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/S ignored |
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/SS ignored |
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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 |
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" \ $ or @ characters, these have to be escaped. For this reason, all such |
" $ or @ characters, these have to be escaped. For this reason, all such |
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characters in testinput1 and testinput3 are escaped so that they can be used |
characters in testinput1, testinput4, testinput6, and testinput11 are escaped |
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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 |
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as /A that pcretest recognizes are not used in these files. The output should |
escape in data lines is removed. |
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be identical, apart from the initial identifying banner. |
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The special upper case pattern modifiers such as /A that pcretest recognizes, |
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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 |
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since they do make use of the special upper case modifiers and escapes that |
should be identical, apart from the initial identifying banner. |
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pcretest uses to test some features of PCRE. The first of these files also |
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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 |
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them correctly. |
modifier /8 that pcretest uses to invoke UTF-8 functionality. The testinput4 |
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and testinput6 files can be fed to perltest to run compatible UTF-8 tests. |
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However, it is necessary to add "use utf8;" to the script to make this work |
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correctly. |
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The testinput11 file contains tests that use features of Perl 5.10, so does not |
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work with Perl 5.8. |
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The other testinput files are not suitable for feeding to perltest.pl, since |
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they make use of the special upper case modifiers and escapes that pcretest |
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uses to test some features of PCRE. Some of these files also contains malformed |
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regular expressions, in order to check that PCRE diagnoses them correctly. |
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Philip Hazel <ph10@cam.ac.uk> |
Philip Hazel |
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January 2000 |
August 2011 |
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