def __init__(self, variable, equivalence, formula, newVariable=None):
self.variable = variable
self.equivalence = equivalence
self.formula = formula
if newVariable is None:
self.newVariable = Variable()
else:
self.newVariable = newVariable
class Unique(Formula):
def __init__(self, variable, equivalence, formula, newVariable=None):
self.variable = variable
self.equivalence = equivalence
self.formula = formula
if newVariable is None:
self.newVariable = Variable()
else:
self.newVariable = newVariable
def _translate(self):
formulaTranslate = self.formula.translate()
all_others_are_equal = basicFormula.Not(
basicFormula.Exists(
self.newVariable,
basicFormula.And(
basicFormula.And(
InDomain(self.newVariable, self.equivalence),
formulaTranslate.substituteVariable(self.variable, self.newVariable),
),
basicFormula.Not(Equal(self.newVariable, self.variable, self.equivalence)),
),
)
)
return basicFormula.And(formulaTranslate, all_others_are_equal)
def substituteVariable(self, a, b):
assert b != self.newVariable
assert a != self.newVariable
return Unique(
variable=self.variable.substituteVariable(a, b),
equivalence=self.equivalence.substituteVariable(a, b),
formula=self.formula.substituteVariable(a, b),
newVariable=self.newVariable,
)
def updateVariables(self):
return Unique(
variable=self.variable,
equivalence=self.equivalence,
formula=self.formula.updateVariables(),
newVariable=self.newVariable.updateVariables(),
)
def render(self, context):
return gl.newTextualGLStack(colors.variableColor, "%s ! in %s . " % (self.variable, self.equivalence)).stack(
0, self.formula.render(context)
)
