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2016-05-12 14:56 GMT+02:00 Roberto Ierusalimschy <>:
>> Lua 5.3.3  Copyright (C) 1994-2016, PUC-Rio
>> > =(";a;"):gsub("a-", "ITEM")
>> I.e. the substring 'a' in ";a;" is not recognized as an instance
>> of the pattern "a-".
> The substring 'a' is not an instance of the pattern "a-", given that
> '' is also valid and shorter than 'a'. So, this behavior seems correct.

Must we conclude, therefore, that the '-' modifier as the last character of
a pattern will never match any character of the class it modifies?