Lua: Storing a logical operator in a variable?

Question

I can't find anything about this through Google so I have to ask here. I want to do something like this (very pseudo code):

y = first_value

x={op_1 = >, op_2 = <, c = some_value}

if first_value x.op_1 x.c then
...
end

What that code says to me is that if first_value if greater than x's c value then do something. Now, I know I could set op_1 and op_2 to some value to differentiate between them and then compare values using separate if statements, but I would like to minimize the number of if statements used.

I was just wondering if something like this is possible, maybe even in a different form. Thanks in advance!

That is not possible. You cannot define your own infix operators in Lua. — Henri Menke
– Henri Menke, Commented May 11, 2018 at 22:47

IS4 · Accepted Answer · 2018-05-11 20:24:46Z

6

Not this way, an operator is a specific symbol that is part of the syntax. However, you can represent an operation using a function:

y = first_value

x={op_1 = function(a,b)return a>b end, op_2 = function(a,b)return a<b end, c = some_value}

if x.op1(first_value, x.c) then
  ...
end

answered May 11, 2018 at 20:24

IS4

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1 Comment

user7577675 Over a year ago

Ah, that makes a lot of sense! I was just overcomplicating it. Thanks!

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