Lazy evaluation of ternary operator's true/false cases about expression HOT 1 OPEN

@nighthawk Expression doesn't currently support lazy evaluation. Unfortunately it's not a simple change because the way that the API is implemented means that the arguments are passed directly by value, and they would have to be passed as closures instead to defer evaluation.

It might be possible for you to work around this by creating a wrapper struct for your values that then evaluates your function lazily, but it would mean writing custom implementations for all the Expression functions and operators to work with your wrapper type.

Alternatively, maybe you could modify your functions to return Result<Success, Failure> values instead of throwing? Then you could preserve the error without aborting execution? You'd probably still have an issue with unwrapping the result inside an expression though.

A third option would be to handle errors C-style by returning nil and having your functions set a global error variable instead of throwing.

from expression.