Premature generalisation is the root of much evil.

In practice, since the OP did not mention any character-set complications, it is a reasonable assumption that the task in question does not require matching non-ASCII capital letters or require excluding non-ASCII numerals. So there is no need to worry about Unicode ranges, and distinguishing between \d and [0-9] is splitting hairs.

In reply to Re^3: pattern matching by Porculus
in thread pattern matching by Spooky

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