Operand evaluation order isn't defined for all operators[1], but it is for this one.

Quote perlop,

In list context, [,] is just the list argument separator, and inserts both its arguments into the list. These arguments are also evaluated from left to right.

That's perfectly fine.

  1. For example, Perl doesn't define the order in which f, g and h will be called by f() + g() + h().

In reply to Re: Order of execution of functions in list by ikegami
in thread Order of execution of functions in list by vsespb

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