lua-users home
lua-l archive

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index]

All the discussion about integers really has me wondering how this is all going to work. I feel that there is the potential for a lot of nasty surprises at the new behaviour of integers and floats silently interconverting. I can see how a distinct integer type would work: think C. The integer subtype leaves me feeling uneasy. This is not a problem for my current use cases: I can stick with Lua 5.2 and its all number are floats (actually doubles in the default configuration) model, the same number model that has been used from the beginning. For use cases where I would need to work in integer but could dispense with floats, I can compile 5.2 with int or long as the number type. Where 5.3 would be useful is when I would need actual integers but couldn't dispense with floats--but in that case, explicit integer and float types would work as well as subtypes, with fewer surprises. Yet a full integer/float type system would break too much existing code. I don't envy the Lua team here--it's very debatable which is the best way to go.

Other features of 5.3work are quite good: The utf8 library is so good that I have backported it to Lua 5.2; and while my current use cases are not helped by moving bit operations into the core, it causes me no problems and is quite useful for those who use bit operations frequently.

-- Mike Nelson