def _test_eval(input: str) -> object.Object:
l = lexer.Lexer(input)
p = parser.Parser(l)
program = p.parse_program()
env = object.Environment()
return evaluator.eval(program, env)
def extend_function_env(fun: object.Function, arguments: List[ast.Expression]):
env = object.Environment(outer=fun.env)
# what about "let x =10; let identity = fn(x){ return x}; fn();"
# in the above example x should be NULL
for idx, param in enumerate(fun.parameters):
env.set(param.value, arguments[idx])
return env
def start():
env = object.Environment()
while True:
line = input(prompt)
l = Lexer(line)
p = Parser(l)
program = p.parse_program()
val = evaluator.eval(program, env)
print(val)
def start():
env = object.Environment()
while True:
line = input(PROMPT)
if not line:
return
l = lexer.Lexer(line)
p = parser.Parser(l)
program = p.parse_program()
if len(p.errors) != 0:
print_parse_errors(p.errors)
continue
evaluated = evaluator.eval(program, env)
if evaluated is not None:
print(evaluated.inspect())
def eval_test(input):
l = lexer.Lexer(input)
p = parser.Parser(l)
program = p.parse_program()
return evaluator.eval(program, object.Environment())