On Aug 19, 2018, at 4:32 PM, Александр Машин<firstname.lastname@example.org> wrote:
Folding take minimum of 2 arguments, maybe more.
However, you can supplied defaults using lpeg.Cc
Your code need 3 + 2k arguments to trigger folding.
Since op is guaranteed a "+" or "-", the last elseif is dead code.
In other words, the code will never reach special case.