def parse_bareword(word):
if word in COLOR_NAMES:
return ColorValue.from_name(word)
elif word == 'null':
return Null()
elif word == 'undefined':
return Undefined()
elif word == 'true':
return BooleanValue(True)
elif word == 'false':
return BooleanValue(False)
else:
return String(word, quotes=None)
def blank(*objs):
"""Returns true when the object is false, an empty string, or an empty list"""
for o in objs:
if isinstance(o, BooleanValue):
is_blank = not o
elif isinstance(o, QuotedStringValue):
is_blank = not len(o.value.strip())
elif isinstance(o, List):
is_blank = all(blank(el) for el in o)
else:
is_blank = False
if not is_blank:
return BooleanValue(False)
return BooleanValue(True)
def prefixed(prefix, *args):
to_fnct_str = 'to_' + to_str(prefix).replace('-', '_')
for arg in List.from_maybe_starargs(args):
if hasattr(arg, to_fnct_str):
return BooleanValue(True)
return BooleanValue(False)
def evaluate(self, calculator, divide=False):
operand = self.operand.evaluate(calculator, divide=True)
return BooleanValue(not (operand))
def evaluate(self, calculator, divide=False):
operands = [
operand.evaluate(calculator, divide=True)
for operand in self.operands
]
return BooleanValue(all(operands))
def comparable(number1, number2):
left = number1.to_base_units()
right = number2.to_base_units()
return BooleanValue(left.unit_numer == right.unit_numer
and left.unit_denom == right.unit_denom)
def unitless(value):
if not isinstance(value, NumberValue):
raise TypeError("Expected number, got %r" % (value, ))
return BooleanValue(value.is_unitless)
def index(lst, val):
for i in xrange(len(lst)):
if lst.value[i] == val:
return NumberValue(i + 1)
return BooleanValue(False)