Can we simplify this?

It looks verdy difficult
https://github.com/linksplatform/Ranges/blob/d7b5ac881f7e8921520f5264ce04a1d97dfd31c3/cpp/Platform.Ranges/EnsureExtensions.h#L33-L43
Why do we create lambdas, recursively descend into other functions, sums a bunch of lines to check that an element is in the range? And why do we throw an exception if the element is not in the range, when we can return a boolean value? Can we simplify this?

Start by reading cpp/Platform.Ranges/EnsureExtensions.h at lines 33-43 and tracing the functions and lambdas used by the range check. Compare the current exception-based behavior with the proposed boolean result, then clarify the intended API and callers before defining what a successful simplification should preserve.

Written by the indexing model from the issue text.