Problem 7 (200pts): lambda

Implement the do_lambda_form function (spec), which creates and returns a LambdaProcedure instance. While you cannot call a user-defined procedure yet, you can verify that you have created the procedure correctly by typing a lambda expression into the interpreter prompt:

scm> (lambda (x y) (+ x y))
(lambda (x y) (+ x y))

In Scheme, it is legal to place more than one expression in the body of a procedure. (There must be at least one expression.) The body attribute of a LambdaProcedure instance is therefore a Scheme list of body expressions. Like a begin special form, evaluating the body of a procedure evaluates all body expressions in order. The return value of a procedure is the value of its last body expression.

Use Ok to unlock and test your code:

python ok -q 07 -u
python ok -q 07