Python Required.fix_identities示例

示例#1

def test_pattern_fix_identities_2():
    pattern = Required(Optional(Argument('X'), Argument('N')), Argument('N'))
    assert pattern.children[0].children[1] == pattern.children[1]
    assert pattern.children[0].children[1] is not pattern.children[1]
    pattern.fix_identities()
    assert pattern.children[0].children[1] is pattern.children[1]

示例#2

def test_pattern_fix_identities_1():
    pattern = Required(Argument('N'), Argument('N'))
    assert pattern.children[0] == pattern.children[1]
    assert pattern.children[0] is not pattern.children[1]
    pattern.fix_identities()
    assert pattern.children[0] is pattern.children[1]