def opposite(asker, object, x):
underlying = asker.ask(properties.check(x, object)).firm_answer
return asker.reply(answer=booleans.opposite(underlying))
def test_concat_empty(asker, a, b):
return booleans.both(
convert.hold(properties.check(is_empty(), a)),
convert.hold(properties.check(is_empty(), b))
)
def irreducible(asker, rep):
head = asker.ask(fields.get_field(representations.head(), rep)).firm_answer
result = strings.to_str(asker, head) not in reducible_heads
return asker.reply(answer=T.from_bool(result))
#FIXME this is much cleaner, but too slow; at any rate could remove duplicate code
return asker.ask_tail(properties.check(opposite(reducible()), rep))