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On Fri, Apr 12, 2013 at 12:20 PM, Roberto Ierusalimschy <> wrote:
> It is tricky to capture the longest valid Lua identifier from the start of
> a string.
> - The pattern "^([%a_][%w_]*)" is locale-dependent.
> - The pattern "^([A-Za-Z_][A-Za-Z0-9_]*)" works only with the original
>   lctype.c.
> [...]
> Any better ideas?

1) Spell it out:


2) do  os.setlocale("C")  before the match.

3) Ignore EBCDIC and assume that [A-Za-Z_] matches all letters.

-- Roberto

That makes me feel like it'd be useful to have classes that expand to "abcdefghijklmnopqrstuvwxyz" and "ABCD

Sent from my Game Boy.