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Old October 8th, 2004, 04:32 PM
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Default Regex Help

Hi,

I need some help with a regular expression. I'm trying to parse, out of text, tags in the following forms:

<%Foo%>
<%Bar("aasd", "213")%>

I want to get the name of the function/tag in a named group, and pull out the parameters (the text inside the "" for each).

Here is what I have so far for the pattern I pass to the Regex object constructor:

@"<%(?<NAMES>\w*)(\(""(?<ARGS>.*)""\))?%>"

This gets the names correctly ('Foo' and 'Bar'), but the ARGS group on ly contains the following:

    aasd", "213

I understand why I get this, but am at a loss as to how to get what I want. Any help would be appreciated; I'm starting to get a little frustrated. Thanks.

 
Old October 8th, 2004, 05:33 PM
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Default

<%(?<

Why is the ? there? The ( is to group the first set of the regexp. Second, in the params part, I see no check for a , or white space.

Brian
 
Old October 8th, 2004, 05:46 PM
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Thanks for the respose.

The '?' is needed to signify a named group; it's necessary, and that part of the expression works fine.

I've since come up with this expression, which works better, but still isn't perfect:

@"<%(?<NAMES>\w*)(\((""(?<ARGS>[^""]*))+\))?%>"

With this, I get the separate parameters, but also the comma delimiters. So if the input was <%Foo("bar", "bar")%>, the captures in the ARGS group would be (without the single quotes):

'bar'
', '
'bar'
'' <- empty string

Again, I realize why this is happening, but no matter what change to the expression I try, I only succeed in breaking it completely.





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