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print(string.find(uri,'/([%-%+])/(.-)/(.*)')) work OK.

but i think "print(string.find(uri,'/([\-\+])/(.-)/(.*)'))" should not be wrong.


2011/9/18 steve donovan <steve.j.donovan@gmail.com>
On Sun, Sep 18, 2011 at 6:07 AM, zhiguo zhao <zhaozg@gmail.com> wrote:
>> print(string.find(uri,'/([\-\+])/(.-)/(.*)'))
> stdin:1: invalid escape sequence near ''/(['

You should use % not \  - Lua string patterns are not regexes although
they are similar.

LuaJIT is more strict than Lua 5.1, so it will catch the illegal escape.

steve d.