make static empty_array to be constexpr - #1682
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Summary
Protects the empty array instance from accidental modifications.
Problem
The global empty array instance lacked strict compile-time protection against mutability.
Solution
Enforced Const Correctness: Marked the internal static
empty_arrayrepresentation asconstexprto ensure it is evaluated at compile time and placed in read-only memory.Impact
Enhances memory safety by guaranteeing that the empty array state cannot be accidentally altered at runtime.