def test_check_scoping():
st = SymbolTable()
for val in xrange(0, 10):
st.enter_scope()
st.add('a', val)
for val in xrange(9, -1, -1):
assert st.find('a') == val
st.leave_scope()
def test_simple():
st = SymbolTable()
val = 1
st.add('a', val)
eq_(st.find('a'), val)
st.enter_scope()
eq_(st.find('a'), val)
st.leave_scope()
eq_(st.find('a'), val)
def test_check_all_functions():
st = SymbolTable()
foo = [1,2,3]
bar = 'hi'
st.add('a', foo)
st.add('b', bar)
eq_(st.find('a'), foo)
eq_(st.find('b'), bar)
st.remove('a')
assert not st.find('a')
assert not st.check_scope('a')
eq_(st.check_scope('b'), bar)
st.add('c', foo)
with st.in_scope() as st:
assert st.find('c') == foo
assert st.find('b') == bar
assert not st.check_scope('c')
assert not st.check_scope('b')
st.add('b', foo)
assert st.find('b') == foo
eq_(st.find('b'), bar)
def eval(self, st):
func_type, func_args, func_body = st.get(self.value)
if len(func_args) != len(self.children):
raise ValueError('Unmatching sizes between defined function args' +
f' and calling args ({len(func_args)} -- ' +
f'{len(self.children)})')
inner_st = SymbolTable(father=st)
if func_type != const.VOID:
inner_st.add(func_type, const.RETURN)
for key, value in zip(func_args, self.children):
key.eval(inner_st) # adds <key> to inner_st
arg_type, arg_name = key.children
# evals value with outter st
inner_st.set(arg_name[0], value.eval(st))
ret_val = func_body.eval(inner_st)
if func_type != const.VOID and ret_val is None:
raise ValueError('Non void function is not returning a value')
elif func_type == const.VOID:
return None
elif func_type != ret_val.type_:
raise ValueError('Miss-matched type between function and return')
return ret_val.value