Category talk:Wren-pattern: Difference between revisions
Added a note on Wren-regex.
(Added limited support for 'quantified group' matches.) |
(Added a note on Wren-regex.) |
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===Wren patterns===
Wren doesn't have direct access to a regular expression library (but see Wren-regex section below) and writing such a library from scratch in a small scripting language such as Wren may not be a viable proposition due to its likely size and performance limitations.
I have therefore designed and coded a simple pattern matcher instead, the rules of which are described below. Obviously, this has nothing like the full power of regular expressions but I hope it will nevertheless be a useful addition to the armory.
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A different and usually better approach is to use the 'findWithGroup' or 'findWithGroup2' methods. These work in an analogous way to the 'findLazy' and 'findLazy2' methods. However, this time '/Z' and '&Z' respectively match the parameter strings 't' and 'u' themselves rather than any characters other than these strings and we can therefore quantify them as though they were 'singles'.
;Wren-regex
Since this module was written, I've created a Wren-regex module which wraps Go's 'regexp' package. Whilst this addresses some shortcomings in Wren-pattern, it requires a special Go executable to use it and doesn't therefore work with Wren-cli.
===Source code===
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