def expr(self, use_reals):
"""
cannot make this as property because z3 expr is ctype,
not compat with multiprocessing Queue
also, cannot save this to sel._expr
"""
return Z3.parse(str(self.inv), use_reals)
def expr(self, use_reals):
"""
# sage: x, y, z = sage.all.var('x y z')
# sage: mp = MPInv.mk_max_ieq((x-10, y-3), (y, 5))
# sage: mp.expr(use_reals=False)
# If(x + -10 >= y + -3, If(y >= 5, x + -10 <= y, x + -10 <= 5),
# If(y >= 5, y + -3 <= y, y + -3 <= 5))
# sage: MPInv.mk_max_ieq((x,), (y,z,0)).expr(use_reals=False)
# If(And(y >= z, y >= 0), x <= y, If(z >= 0, x <= z, x <= 0))
"""
a = tuple(Z3.parse(str(x), use_reals) for x in self.term.a)
b = tuple(Z3.parse(str(x), use_reals) for x in self.term.b)
expr = self.mp2df_expr(a, b, 0, self.term.is_max, self.is_ieq)
return expr
def expr(self, use_reals):
try:
return self._expr
except AttributeError:
self._expr = Z3.parse(str(self.sageExpr), use_reals)
return self._expr