int main()
{
    using IA = int[];

    IA{ 1, 2, 3 } + 0;
}

[expr.add]/1:

For addition, either both operands shall have arithmetic or unscoped enumeration type, or one operand shall be a pointer to a completely-defined object type and the other shall have integral or unscoped enumeration type.

Array types are not allowed. Neither there is wording requiring the array-to-pointer conversion on a prvalue array operand.