Exemple #1
0
def nodes_iter(n) -> Generator[Any, None, None]:
    """
    Iterate all nodes of :obj:`n`, including :obj:`n`.
    Nodes are returned only once.
    """
    if n == nodes.Null_Iir:
        return
    #    print 'nodes_iter for {0}'.format(n)
    yield n
    for f in fields_iter(n):
        typ = nodes_meta.get_field_type(f)
        #        print ' {0}: field {1} (type: {2})'.format(
        #            n, fields_image(f), types_image(typ))
        if typ == nodes_meta.types.Iir:
            attr = nodes_meta.get_field_attribute(f)
            if attr == nodes_meta.Attr.ANone:
                for n1 in nodes_iter(nodes_meta.Get_Iir(n, f)):
                    yield n1
            elif attr == nodes_meta.Attr.Chain:
                n2 = nodes_meta.Get_Iir(n, f)
                while n2 != nodes.Null_Iir:
                    for n1 in nodes_iter(n2):
                        yield n1
                    n2 = nodes.Get_Chain(n2)
            elif attr == nodes_meta.Attr.Maybe_Ref:
                if not nodes.Get_Is_Ref(n, f):
                    for n1 in nodes_iter(nodes_meta.Get_Iir(n, f)):
                        yield n1
        elif typ == nodes_meta.types.Iir_List:
            attr = nodes_meta.get_field_attribute(f)
            if attr == nodes_meta.Attr.ANone:
                for n1 in list_iter(nodes_meta.Get_Iir_List(n, f)):
                    for n2 in nodes_iter(n1):
                        yield n2
        elif typ == nodes_meta.types.Iir_Flist:
            attr = nodes_meta.get_field_attribute(f)
            if attr == nodes_meta.Attr.ANone:
                for n1 in flist_iter(nodes_meta.Get_Iir_Flist(n, f)):
                    for n2 in nodes_iter(n1):
                        yield n2
Exemple #2
0
def find_def(n, loc):
    "Return the node at location :param loc:, or None if not under :param n:"
    if n == nodes.Null_Iir:
        return None
    k = nodes.Get_Kind(n)
    if k in [
        nodes.Iir_Kind.Simple_Name,
        nodes.Iir_Kind.Character_Literal,
        nodes.Iir_Kind.Operator_Symbol,
        nodes.Iir_Kind.Selected_Name,
        nodes.Iir_Kind.Attribute_Name,
        nodes.Iir_Kind.Selected_Element,
    ]:
        n_loc = nodes.Get_Location(n)
        if loc >= n_loc:
            ident = nodes.Get_Identifier(n)
            id_len = name_table.Get_Name_Length(ident)
            if loc < n_loc + id_len:
                return n
        if k == nodes.Iir_Kind.Simple_Name:
            return None
    elif k == nodes.Iir_Kind.Design_File:
        return find_def_chain(nodes.Get_First_Design_Unit(n), loc)
    elif k == nodes.Iir_Kind.Design_Unit:
        # if loc > elocations.Get_End_Location(unit):
        #    return None
        res = find_def_chain(nodes.Get_Context_Items(n), loc)
        if res is not None:
            return res
        unit = nodes.Get_Library_Unit(n)
        return find_def(unit, loc)

    # This is *much* faster than using node_iter!
    for f in pyutils.fields_iter(n):
        typ = nodes_meta.get_field_type(f)
        if typ == nodes_meta.types.Iir:
            attr = nodes_meta.get_field_attribute(f)
            if attr == nodes_meta.Attr.ANone:
                res = find_def(nodes_meta.Get_Iir(n, f), loc)
                if res is not None:
                    return res
            elif attr == nodes_meta.Attr.Chain:
                res = find_def_chain(nodes_meta.Get_Iir(n, f), loc)
                if res is not None:
                    return res
            elif attr == nodes_meta.Attr.Maybe_Ref:
                if not nodes.Get_Is_Ref(n):
                    res = find_def(nodes_meta.Get_Iir(n, f), loc)
                    if res is not None:
                        return res
        elif typ == nodes_meta.types.Iir_List:
            attr = nodes_meta.get_field_attribute(f)
            if attr == nodes_meta.Attr.ANone:
                for n1 in pyutils.list_iter(nodes_meta.Get_Iir_List(n, f)):
                    res = find_def(n1, loc)
                    if res is not None:
                        return res
        elif typ == nodes_meta.types.Iir_Flist:
            attr = nodes_meta.get_field_attribute(f)
            if attr == nodes_meta.Attr.ANone:
                for n1 in pyutils.flist_iter(nodes_meta.Get_Iir_Flist(n, f)):
                    res = find_def(n1, loc)
                    if res is not None:
                        return res

    return None