def EVAL(ast, env):
while True:
#print("EVAL %s" % printer._pr_str(ast))
if not types._list_Q(ast):
return eval_ast(ast, env)
# apply list
ast = macroexpand(ast, env)
if not types._list_Q(ast):
return eval_ast(ast, env)
if len(ast) == 0: return ast
a0 = ast[0]
if "def!" == a0:
a1, a2 = ast[1], ast[2]
res = EVAL(a2, env)
return env.set(a1, res)
elif "let*" == a0:
a1, a2 = ast[1], ast[2]
let_env = Env(env)
for i in range(0, len(a1), 2):
let_env.set(a1[i], EVAL(a1[i+1], let_env))
ast = a2
env = let_env
# Continue loop (TCO)
elif "quote" == a0:
return ast[1]
elif "quasiquote" == a0:
ast = quasiquote(ast[1]);
# Continue loop (TCO)
elif 'defmacro!' == a0:
func = types._clone(EVAL(ast[2], env))
func._ismacro_ = True
return env.set(ast[1], func)
elif 'macroexpand' == a0:
return macroexpand(ast[1], env)
elif "do" == a0:
eval_ast(ast[1:-1], env)
ast = ast[-1]
# Continue loop (TCO)
elif "if" == a0:
a1, a2 = ast[1], ast[2]
cond = EVAL(a1, env)
if cond is None or cond is False:
if len(ast) > 3: ast = ast[3]
else: ast = None
else:
ast = a2
# Continue loop (TCO)
elif "fn*" == a0:
a1, a2 = ast[1], ast[2]
return types._function(EVAL, Env, a2, env, a1)
else:
el = eval_ast(ast, env)
f = el[0]
if hasattr(f, '__ast__'):
ast = f.__ast__
env = f.__gen_env__(el[1:])
else:
return f(*el[1:])
def with_meta(args):
obj, meta = args[0], args[1]
if isinstance(obj, MalMeta):
new_obj = types._clone(obj)
new_obj.meta = meta
return new_obj
else:
throw_str("with-meta not supported on type")
def EVAL(ast, env):
while True:
dbgeval = env.get_or_nil('DEBUG-EVAL')
if dbgeval is not None and dbgeval is not False:
print('EVAL: ' + printer._pr_str(ast))
if types._symbol_Q(ast):
return env.get(ast)
elif types._vector_Q(ast):
return types._vector(*map(lambda a: EVAL(a, env), ast))
elif types._hash_map_Q(ast):
return types.Hash_Map((k, EVAL(v, env)) for k, v in ast.items())
elif not types._list_Q(ast):
return ast # primitive value, return unchanged
else:
# apply list
if len(ast) == 0: return ast
a0 = ast[0]
if "def!" == a0:
a1, a2 = ast[1], ast[2]
res = EVAL(a2, env)
return env.set(a1, res)
elif "let*" == a0:
a1, a2 = ast[1], ast[2]
let_env = Env(env)
for i in range(0, len(a1), 2):
let_env.set(a1[i], EVAL(a1[i + 1], let_env))
ast = a2
env = let_env
# Continue loop (TCO)
elif "quote" == a0:
return ast[1]
elif "quasiquote" == a0:
ast = quasiquote(ast[1])
# Continue loop (TCO)
elif 'defmacro!' == a0:
func = types._clone(EVAL(ast[2], env))
func._ismacro_ = True
return env.set(ast[1], func)
elif "do" == a0:
for i in range(1, len(ast) - 1):
EVAL(ast[i], env)
ast = ast[-1]
# Continue loop (TCO)
elif "if" == a0:
a1, a2 = ast[1], ast[2]
cond = EVAL(a1, env)
if cond is None or cond is False:
if len(ast) > 3: ast = ast[3]
else: ast = None
else:
ast = a2
# Continue loop (TCO)
elif "fn*" == a0:
a1, a2 = ast[1], ast[2]
return types._function(EVAL, Env, a2, env, a1)
else:
f = EVAL(a0, env)
args = ast[1:]
if hasattr(f, '_ismacro_'):
ast = f(*args)
continue # TCO
if hasattr(f, '__ast__'):
ast = f.__ast__
env = f.__gen_env__(types.List(EVAL(a, env) for a in args))
else:
return f(*(EVAL(a, env) for a in args))
def EVAL(ast, env):
while True:
#print("EVAL %s" % printer._pr_str(ast))
if not types._list_Q(ast):
return eval_ast(ast, env)
# apply list
ast = macroexpand(ast, env)
if not types._list_Q(ast):
return eval_ast(ast, env)
if len(ast) == 0: return ast
a0 = ast[0]
if "def!" == a0:
a1, a2 = ast[1], ast[2]
res = EVAL(a2, env)
return env.set(a1, res)
elif "let*" == a0:
a1, a2 = ast[1], ast[2]
let_env = Env(env)
for i in range(0, len(a1), 2):
let_env.set(a1[i], EVAL(a1[i + 1], let_env))
ast = a2
env = let_env
# Continue loop (TCO)
elif "quote" == a0:
return ast[1]
elif "quasiquote" == a0:
ast = quasiquote(ast[1])
# Continue loop (TCO)
elif 'defmacro!' == a0:
func = types._clone(EVAL(ast[2], env))
func._ismacro_ = True
return env.set(ast[1], func)
elif 'macroexpand' == a0:
return macroexpand(ast[1], env)
elif "py!*" == a0:
exec(compile(ast[1], '', 'single'), globals())
return None
elif "py*" == a0:
return types.py_to_mal(eval(ast[1]))
elif "." == a0:
el = eval_ast(ast[2:], env)
f = eval(ast[1])
return f(*el)
elif "try*" == a0:
if len(ast) < 3:
return EVAL(ast[1], env)
a1, a2 = ast[1], ast[2]
if a2[0] == "catch*":
err = None
try:
return EVAL(a1, env)
except types.MalException as exc:
err = exc.object
except Exception as exc:
err = exc.args[0]
catch_env = Env(env, [a2[1]], [err])
return EVAL(a2[2], catch_env)
else:
return EVAL(a1, env)
elif "do" == a0:
eval_ast(ast[1:-1], env)
ast = ast[-1]
# Continue loop (TCO)
elif "if" == a0:
a1, a2 = ast[1], ast[2]
cond = EVAL(a1, env)
if cond is None or cond is False:
if len(ast) > 3: ast = ast[3]
else: ast = None
else:
ast = a2
# Continue loop (TCO)
elif "fn*" == a0:
a1, a2 = ast[1], ast[2]
return types._function(EVAL, Env, a2, env, a1)
else:
el = eval_ast(ast, env)
f = el[0]
if hasattr(f, '__ast__'):
ast = f.__ast__
env = f.__gen_env__(el[1:])
else:
return f(*el[1:])
def with_meta(obj, meta):
new_obj = types._clone(obj)
new_obj.__meta__ = meta
return new_obj
def with_meta(obj, meta):
new_obj = types._clone(obj)
new_obj.__meta__ = meta
return new_obj
def EVAL(ast, env):
while True:
dbgeval = env.get_or_nil('DEBUG-EVAL')
if dbgeval is not None and dbgeval is not False:
print('EVAL: ' + printer._pr_str(ast))
if types._symbol_Q(ast):
return env.get(ast)
elif types._vector_Q(ast):
return types._vector(*map(lambda a: EVAL(a, env), ast))
elif types._hash_map_Q(ast):
return types.Hash_Map((k, EVAL(v, env)) for k, v in ast.items())
elif not types._list_Q(ast):
return ast # primitive value, return unchanged
else:
# apply list
if len(ast) == 0: return ast
a0 = ast[0]
if "def!" == a0:
a1, a2 = ast[1], ast[2]
res = EVAL(a2, env)
return env.set(a1, res)
elif "let*" == a0:
a1, a2 = ast[1], ast[2]
let_env = Env(env)
for i in range(0, len(a1), 2):
let_env.set(a1[i], EVAL(a1[i+1], let_env))
ast = a2
env = let_env
# Continue loop (TCO)
elif "quote" == a0:
return ast[1]
elif "quasiquote" == a0:
ast = quasiquote(ast[1]);
# Continue loop (TCO)
elif 'defmacro!' == a0:
func = types._clone(EVAL(ast[2], env))
func._ismacro_ = True
return env.set(ast[1], func)
elif "py!*" == a0:
exec(compile(ast[1], '', 'single'), globals())
return None
elif "py*" == a0:
return types.py_to_mal(eval(ast[1]))
elif "." == a0:
el = (EVAL(ast[i], env) for i in range(2, len(ast)))
f = eval(ast[1])
return f(*el)
elif "try*" == a0:
if len(ast) < 3:
return EVAL(ast[1], env)
a1, a2 = ast[1], ast[2]
if a2[0] == "catch*":
err = None
try:
return EVAL(a1, env)
except types.MalException as exc:
err = exc.object
except Exception as exc:
err = exc.args[0]
catch_env = Env(env, [a2[1]], [err])
return EVAL(a2[2], catch_env)
else:
return EVAL(a1, env);
elif "do" == a0:
for i in range(1, len(ast)-1):
EVAL(ast[i], env)
ast = ast[-1]
# Continue loop (TCO)
elif "if" == a0:
a1, a2 = ast[1], ast[2]
cond = EVAL(a1, env)
if cond is None or cond is False:
if len(ast) > 3: ast = ast[3]
else: ast = None
else:
ast = a2
# Continue loop (TCO)
elif "fn*" == a0:
a1, a2 = ast[1], ast[2]
return types._function(EVAL, Env, a2, env, a1)
else:
f = EVAL(a0, env)
args = ast[1:]
if hasattr(f, '_ismacro_'):
ast = f(*args)
continue # TCO
if hasattr(f, '__ast__'):
ast = f.__ast__
env = f.__gen_env__(types.List(EVAL(a, env) for a in args))
else:
return f(*(EVAL(a, env) for a in args))
