def partial_eval(self):
value = self.value.partial_eval()
start_index = self.lang[CaseOp([
WhenOp(self.prefix.missing(), **{"then": ZERO}),
WhenOp(IsNumberOp(self.prefix),
**{"then": MaxOp([ZERO, self.prefix])}),
FindOp([value, self.prefix], start=self.start),
])].partial_eval()
len_prefix = self.lang[CaseOp([
WhenOp(self.prefix.missing(), **{"then": ZERO}),
WhenOp(IsNumberOp(self.prefix), **{"then": ZERO}),
LengthOp(self.prefix),
])].partial_eval()
end_index = self.lang[CaseOp([
WhenOp(start_index.missing(), **{"then": NULL}),
WhenOp(self.suffix.missing(), **{"then": LengthOp(value)}),
WhenOp(IsNumberOp(self.suffix),
**{"then": MinOp([self.suffix, LengthOp(value)])}),
FindOp([value, self.suffix],
start=AddOp([start_index, len_prefix])),
])].partial_eval()
start_index = AddOp([start_index, len_prefix]).partial_eval()
substring = BasicSubstringOp([value, start_index,
end_index]).partial_eval()
between = self.lang[WhenOp(end_index.missing(), **{
"then": self.default,
"else": substring
})].partial_eval()
return between
def partial_eval(self):
value = self.lang[self.value].partial_eval()
length = self.lang[self.length].partial_eval()
max_length = LengthOp(value)
return self.lang[WhenOp(
self.missing(), **{
"else":
BasicSubstringOp(
[value, ZERO,
MaxOp([ZERO, MinOp([length, max_length])])])
})].partial_eval()
def partial_eval(self, lang):
value = (self.value).partial_eval(lang)
length = (self.length).partial_eval(lang)
max_length = LengthOp(value)
return WhenOp(
self.missing(lang),
**{"else": BasicSubstringOp([
value,
MaxOp([ZERO, MinOp([max_length, SubOp([max_length, length])])]),
max_length,
])}
).partial_eval(lang)
def partial_eval(self):
value = self.lang[self.value].partial_eval()
length = self.length.partial_eval()
if length is ZERO:
return value
max_length = LengthOp(value)
part = BasicSubstringOp([
value,
ZERO,
MaxOp([ZERO,
MinOp([max_length, SubOp([max_length, length])])]),
])
return self.lang[WhenOp(self.missing(), **{"else":
part})].partial_eval()
def partial_eval(self, lang):
value = (self.value).partial_eval(lang)
length = self.length.partial_eval(lang)
if length is ZERO:
return value
max_length = LengthOp(value)
part = BasicSubstringOp([
value,
ZERO,
MaxOp([ZERO,
MinOp([max_length, SubOp([max_length, length])])]),
])
return (WhenOp(self.missing(lang), **{"else":
part})).partial_eval(lang)
def partial_eval(self, lang):
value = (self.value).partial_eval(lang)
length = self.length.partial_eval(lang)
if length is ZERO:
return value
max_length = LengthOp(value)
output = WhenOp(
self.missing(lang),
**{"else": BasicSubstringOp([
value,
MaxOp([ZERO, MinOp([length, max_length])]),
max_length,
])}
).partial_eval(lang)
return output
def partial_eval(self):
value = self.lang[self.value].partial_eval()
length = self.length.partial_eval()
if length is ZERO:
return value
max_length = LengthOp(value)
output = self.lang[WhenOp(
self.missing(), **{
"else":
BasicSubstringOp([
value,
MaxOp([ZERO, MinOp([length, max_length])]), max_length
])
})].partial_eval()
return output