Function is_simple

Parser/asdl_c.py:80–93

Return True if a sum is a simple. A sum is simple if its types have no fields and itself doesn't have any attributes. Instances of these types are cached at C level, and they act like singletons when propagating parser generated nodes into Python level, e.g. unaryop = Invert | N

(sum_type)

    return '"%s"' % s.replace('\n', '\\n"\n%s"' % (' ' * depth * TABSIZE))

def is_simple(sum_type):
    """Return True if a sum is a simple.

    A sum is simple if its types have no fields and itself
    doesn't have any attributes. Instances of these types are
    cached at C level, and they act like singletons when propagating
    parser generated nodes into Python level, e.g.
    unaryop = Invert | Not | UAdd | USub
    """

    return not (
        sum_type.attributes or
        any(constructor.fields for constructor in sum_type.types)
    )

def asdl_of(name, obj):
    if isinstance(obj, asdl.Product) or isinstance(obj, asdl.Constructor):