def s(name):
"Return a MalSymbol named s."
return reader.MalSymbol(name)
import sys
import readline
import reader
import printer
class EvalException(Exception):
"""Won't cause the repl to crash, but aborts reading current form"""
pass
REPL_ENV = {
reader.MalSymbol('+'): lambda a, b: a + b,
reader.MalSymbol('-'): lambda a, b: a - b,
reader.MalSymbol('*'): lambda a, b: a * b,
reader.MalSymbol('/'): lambda a, b: int(a / b)
}
def eval_ast(form, env):
if isinstance(form, reader.MalSymbol):
result = env.get(form)
if result is None:
raise EvalException('could not find symbol: ' + form.name)
return result
elif isinstance(form, reader.MalList):
return [EVAL(x, env) for x in form.value]
elif isinstance(form, list):
return [EVAL(x, env) for x in form]
elif isinstance(form, dict):
result = {}