Readability question.

I've found myself writting the expresion

(a and b and combine(a,b)) or a or b

is what it does "obvious"? ( I would not declare it idiomatic, as "a
and b or c" )

( context: a,b are tipically optional numbers, or tables, combine is a
function which "merges" tables, or something like add/mul/gcd,
expresion is used typically in return, local initialization or
parameter calculation to a function ( which is lot like local
initialization ). I fear maintenance problems ahead if meaning not
obvious.

Francisco Olarte.

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