Problem 7 (200pts): lambda

2022年12月5日22:00更新：

如果你遇到了<xxx> is not defined的情况，请删除代码文件夹中的scheme文件（注意不是删除scheme.py文件）！

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.

Before writing any code, unlock the tests to verify your understanding of the question:

$ python3 ok -q 07 -u

Once you are done unlocking, begin implementing your solution. You can check your correctness with:

$ python3 ok -q 07