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- Subject: Re: Invalid Capture Index
- From: Rici Lake <lua@...>
- Date: Thu, 5 Jul 2007 10:11:47 -0500
On 5-Jul-07, at 9:49 AM, Patrick Donnelly wrote:
I'm trying to understand this error. I tried looking at the source,
but it didn't help much. I'm getting this error as the result of
looking for a word in a localized string.
I'm originally given a string similar to: "%s goes to %s". This is
localized during startup, and it is formatted according to the
situation. I receive the formatted string and would like to extract
what each %s is. Thus I'm using captures. So I take "%s goes to %s"
and format it:
local x = "Dave goes to Britain" -- Given to me
local y = string.format("%s goes to %s", "(%w*)", "(%w*)");
-- Then I get the captures:
local _, _, who, where = string.find(x, y);
My problem is this works fine for English, but when I use this for a
German locale I receive the error: Invalid Capture Index. I'm really
confused about what is going wrong here, mostly because I don't
understand this error.
Perhaps the German format string has % codes in it? Sounds to me like
your compiled string pattern has an invalid back-reference or some such.