Re: string patterns

[Andreas Stenius <andreas@...>]

Luiz Henrique de Figueiredo skrev:
> > No, not alternates like that, simply to be able to:
> >
> > foo:gsub("(.-)[%s$]", bar)
>
> Then try foo:gsub("(.-)%s?$", bar).

Yes, but this will make the capture greedy.. what saved me was that when 
I read the source in lstrlib.c I found the frontiers: %f[...] which 
saved me by simply appending a space at the end of my subject.

What made this more problematic was that I wanted to match

[[name=value name2='other val' name3="no, should I match this as well!"]]

where the value MIGHT be enclosed in single OR double quotes, and with 
quotes, there may be spaces between the quotes too ;o).

So my pattern I successfully use now isn't pretty:

-- snippet is part of a bigger function

	local function parseargs()
		local t = {}
		;(args .. " "):gsub("(%w+)%s*=%s*([\"']?)(.-)%2%f[%s]",
			function( k, _, v )
				t[k:lower()] = v
				return ""
			end)
		return t
	end


--
Med vänlig hälsning,
Andreas Stenius
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