from functools import partial
from itertools import chain

def is_label(token_line):
    return token_line[0].endswith(':')

def is_data(token_line, data_tokens):
    return token_line[0] in data_tokens

Label = object()
Data = object()

def _event(token_line, data_tokens):
    if is_label(token_line):
        label0, = token_line
        yield Label, label0.split(':')[0]
    elif is_data(token_line, data_tokens):
        _, args = token_line
        yield Data, args
    else:
        return

def event(tokens, data_tokens):
    return list(chain.from_iterable(map(
        partial(_event, data_tokens=data_tokens), tokens)))

def pointer_table(type_args, ix):
    pointer_table = []
    while ix < len(type_args):
        type, args = type_args[ix]
        if type is Label:
            break
        elif type is Data:
            evos_moves_label, = args
            pointer_table.append(evos_moves_label)
        else:
            assert False, type_args
        ix += 1
    return ix, pointer_table