def partial_eval(self):
term = self.lang[FirstOp(self.term)].partial_eval()
if is_literal(term):
if term is NULL:
return NULL
elif term is FALSE:
return ZERO
elif term is TRUE:
return ONE
v = term.value
if isinstance(v, (text, Date)):
return self.lang[Literal(float(v))]
elif isinstance(v, (int, float)):
return term
else:
Log.error("can not convert {{value|json}} to number",
value=term.value)
elif is_op(term, CaseOp): # REWRITING
return self.lang[CaseOp([
WhenOp(t.when, **{"then": NumberOp(t.then)})
for t in term.whens[:-1]
] + [NumberOp(term.whens[-1])])].partial_eval()
elif is_op(term, WhenOp): # REWRITING
return self.lang[WhenOp(
term.when, **{
"then": NumberOp(term.then),
"else": NumberOp(term.els_)
})].partial_eval()
elif is_op(term, CoalesceOp):
return self.lang[CoalesceOp([NumberOp(t) for t in term.terms])]
return self.lang[NumberOp(term)]
def partial_eval(self):
term = self.lang[FirstOp(self.term)].partial_eval()
if is_op(term, CoalesceOp):
return self.lang[CoalesceOp([IntegerOp(t) for t in term.terms])]
if term.type == INTEGER:
return term
return self.lang[IntegerOp(term)]
def partial_eval(self, lang):
term = FirstOp(self.term).partial_eval(lang)
if is_op(term, CoalesceOp):
return (CoalesceOp([IntegerOp(t) for t in term.terms]))
if term.type == INTEGER:
return term
return (IntegerOp(term))
def partial_eval(self):
term = self.term
if term.type is IS_NULL:
return NULL
term = self.lang[FirstOp(term)].partial_eval()
if is_op(term, StringOp):
return term.term.partial_eval()
elif is_op(term, CoalesceOp):
return self.lang[CoalesceOp(
[self.lang[StringOp(t)].partial_eval() for t in term.terms])]
elif is_literal(term):
if term.type == STRING:
return term
else:
return self.lang[Literal(mo_json.value2json(term.value))]
return self
def partial_eval(self, lang):
term = self.term
if term.type is IS_NULL:
return NULL
term = (FirstOp(term)).partial_eval(lang)
if is_op(term, StringOp):
return term.term.partial_eval(lang)
elif is_op(term, CoalesceOp):
return CoalesceOp([
(StringOp(t)).partial_eval(lang) for t in term.terms
])
elif is_literal(term):
if term.type == STRING:
return term
else:
return (Literal(mo_json.value2json(term.value)))
return self
def partial_eval(self):
terms = []
for t in self.terms:
simple = self.lang[FirstOp(t)].partial_eval()
if simple is NULL:
pass
elif is_literal(simple):
terms.append(simple)
break
else:
terms.append(simple)
if len(terms) == 0:
return NULL
elif len(terms) == 1:
return terms[0]
else:
return self.lang[CoalesceOp(terms)]