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On 08/05/16 03:35 PM, Dirk Laurie wrote:
2016-05-06 17:46 GMT+02:00 Roberto Ierusalimschy <roberto@inf.puc-rio.br>:
Lua 5.3.3 (rc1) is now available for testing at
       http://www.lua.org/work/
...
Follows a short list of what changed in 5.3.3:

...
- new semantics for empty matches ("Python rule")
Is there a way to distinguish between Lua 5.3.x (x<=2) and Lua
5.3.3, apart from exploiting different behaviour in gmatch/gsub?

You can use goto.

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