def eval(self, t, env):
#if variable definition
if t.getCdr().getCar().isSymbol():
env.define(
t.getCdr().getCar(),
Cons(t.getCdr().getCdr().getCar().eval(env),
Nil.getInstance()))
#If definition is for a closure
elif t.getCdr().getCar().isPair():
env.define(t.getCdr().getCar().getCar(),
Cons(Closure(t.getCdr(), env), Nil.getInstance()))
return Nil.getInstance()
def eval(self, exp, env):
key = exp.getCdr().getCar()
val = exp.getCdr().getCdr().getCar()
# if defining a variable
if key.isSymbol():
env.define(key, val)
# if defining a function
else:
func = Closure(
Cons(exp.getCdr().getCar().getCdr(),
exp.getCdr().getCdr()), env)
env.define(key.getCar(), func)
return StrLit("no values returned")
def eval(self, exp, env):
return Closure(exp.getCdr(), env, trimmed=True)
def eval(self, exp, env):
return Closure(exp, env)