Exercise 5.50 · 习题

Exercise 5.50: Use the compiler to compile the

metacircular evaluator of 4.1 and run this program using the

register-machine simulator. (To compile more than one definition at a time,

you can package the definitions in a begin.) The resulting interpreter

will run very slowly because of the multiple levels of interpretation, but

getting all the details to work is an instructive exercise.

练习 5.50：使用编译器编译 4.1 节的元循环求值器，并在寄存器机器模拟器上运行这个程序。（若要一次编译多个定义，可将定义包裹在一个 begin 中。）所得解释器由于存在多层解释，运行速度会非常慢，但让所有细节都正确运转是一项很有价值的练习。