[luatex] Will the next version of LuaTeX allow integer up to 2^(63)-1?

Mico Loretan loretan.mico at gmail.com
Fri Oct 2 09:42:22 CEST 2015


It is well known that TeX’s count registers, \count0 thru \count255, have a range of 2^32 integers (from -2^31 thru 2^31-1). 

Lua 5.3, released in January 2015, introduced an explicit integer numeric type. Integers are now stored and processed as 64-bit items. If and when LuaTeX switches from Lua 5.2 to 5.3, will the range of permissible integers in TeX counters be expanded from 2^32 to 2^64, so that they can range from 2^(-63) to 2^63-1? Just curious.

Best, Mico

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