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first named subpattern) and a construct such as (?&a) would reference the |
first named subpattern) and a construct such as (?&a) would reference the |
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first named subpattern whose name started with "a" (in other words, the |
first named subpattern whose name started with "a" (in other words, the |
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length check was missing). |
length check was missing). |
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6. The erroneous patterns (?+-a) and (?-+a) give different error messages; |
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this is right because (?- can be followed by option settings as well as by |
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digits. I have, however, made the messages clearer. |
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Version 7.4 21-Sep-07 |
Version 7.4 21-Sep-07 |