def test_make_node(self):
self.clearOutput()
l = symbols.NUMBER(2, lineno=1)
u = symbols.NUMBER(3, lineno=2)
symbols.BOUND.make_node(l, u, 3)
self.assertEqual(self.stderr, '')
l = symbols.NUMBER(4, lineno=1)
symbols.BOUND.make_node(l, u, 3)
self.assertEqual(
self.stderr,
'(stdin):3: Lower array bound must be less or equal to upper one\n'
)
self.clearOutput()
l = symbols.NUMBER(-4, lineno=1)
symbols.BOUND.make_node(l, u, 3)
self.assertEqual(self.stderr,
'(stdin):3: Array bounds must be greater than 0\n')
self.clearOutput()
l = symbols.VAR('a', 10)
symbols.BOUND.make_node(l, u, 3)
self.assertEqual(self.stderr,
'(stdin):3: Array bounds must be constants\n')
def declare_variable(self, id_, lineno, type_, default_value=None):
""" Like the above, but checks that entry.declared is False.
Otherwise raises an error.
Parameter default_value specifies an initialized variable, if set.
"""
assert isinstance(type_, symbols.TYPEREF)
if not self.check_is_undeclared(id_, lineno, scope=self.current_scope, show_error=False):
entry = self.get_entry(id_)
if entry.scope == SCOPE.parameter:
syntax_error(lineno,
"Variable '%s' already declared as a parameter "
"at %s:%i" % (id_, entry.filename, entry.lineno))
else:
syntax_error(lineno, "Variable '%s' already declared at "
"%s:%i" % (id_, entry.filename, entry.lineno))
return None
if not self.check_class(id_, CLASS.var, lineno, scope=self.current_scope):
return None
entry = (self.get_entry(id_, scope=self.current_scope) or
self.declare(id_, lineno, symbols.VAR(id_, lineno, class_=CLASS.var)))
__DEBUG__("Entry %s declared with class %s at scope %i" % (entry.name, CLASS.to_string(entry.class_),
self.current_scope))
if entry.type_ is None or entry.type_ == self.basic_types[TYPE.unknown]:
entry.type_ = type_
if entry.type_ != type_:
if not type_.implicit and entry.type_ is not None:
syntax_error(lineno,
"'%s' suffix is for type '%s' but it was "
"declared as '%s'" %
(id_, entry.type_, type_))
return None
entry.scope = SCOPE.global_ if self.current_scope == self.global_scope else SCOPE.local
entry.callable = False
entry.class_ = CLASS.var # HINT: class_ attribute could be erased if access_id was used.
entry.declared = True # marks it as declared
if entry.type_.implicit and entry.type_ != self.basic_types[TYPE.unknown]:
warning_implicit_type(lineno, id_, entry.type_.name)
if default_value is not None and entry.type_ != default_value.type_:
if is_number(default_value):
default_value = symbols.TYPECAST.make_node(entry.type_, default_value,
lineno)
if default_value is None:
return None
else:
syntax_error(lineno,
"Variable '%s' declared as '%s' but initialized "
"with a '%s' value" %
(id_, entry.type_, default_value.type_))
return None
entry.default_value = default_value
return entry
def setUp(self):
zxbpp.init()
self.l = symbols.VAR('a', lineno=1, type_=Type.ubyte)
self.r = symbols.NUMBER(3, lineno=2)
self.b = symbols.BINARY('PLUS', self.l, self.r, lineno=3)
self.st = symbols.STRING("ZXBASIC", lineno=1)
if OPTIONS.has_option('stderr'):
OPTIONS.remove_option('stderr')
OPTIONS.add_option('stderr', type_=None, default_value=StringIO())
def test_make_node_wrong(self):
bad_index = symbols.VAR(
'a', 0, type_=gl.SYMBOL_TABLE.basic_types[gl.TYPE.string])
s = symbols.STRSLICE.make_node(1, self.str_, bad_index, bad_index)
self.assertIsNone(s)
def setUp(self):
self.v = symbols.VAR('v', 1) # This also tests __init__