AstRef Class Reference

Inheritance diagram for AstRef:

Public Member Functions
def	__init__ (self, ast, ctx=None)
def	__del__ (self)
def	__deepcopy__ (self, memo={})
def	__str__ (self)
def	__repr__ (self)
def	__eq__ (self, other)
def	__hash__ (self)
def	__nonzero__ (self)
def	__bool__ (self)
def	sexpr (self)
def	as_ast (self)
def	get_id (self)
def	ctx_ref (self)
def	eq (self, other)
def	translate (self, target)
def	hash (self)
Public Member Functions inherited from Z3PPObject
def	use_pp (self)

Data Fields
	ast
	ctx

Detailed Description

AST are Direct Acyclic Graphs (DAGs) used to represent sorts, declarations and expressions.

Definition at line 275 of file z3py.py.

Constructor & Destructor Documentation

__init__()

def __init__	(		self,
			ast,
			ctx = None
	)

Definition at line 277 of file z3py.py.

    def __init__(self, ast, ctx=None):
        self.ast  = ast
        self.ctx  = _get_ctx(ctx)
        Z3_inc_ref(self.ctx.ref(), self.as_ast())

__del__()

def __del__

(

self

)

Definition at line 282 of file z3py.py.

    def __del__(self):
        if self.ctx.ref() is not None:
           Z3_dec_ref(self.ctx.ref(), self.as_ast())

Member Function Documentation

__bool__()

def __bool__

(

self

)

Definition at line 304 of file z3py.py.

Referenced by AstRef.__nonzero__().

    def __bool__(self):
        if is_true(self):
            return True
        elif is_false(self):
            return False
        elif is_eq(self) and self.num_args() == 2:
           return self.arg(0).eq(self.arg(1))
        else:
            raise Z3Exception("Symbolic expressions cannot be cast to concrete Boolean values.")

__deepcopy__()

def __deepcopy__	(		self,
			memo = {}
	)

Definition at line 286 of file z3py.py.

    def __deepcopy__(self, memo={}):
        return _to_ast_ref(self.ast, self.ctx)

__eq__()

def __eq__	(		self,
			other
	)

Definition at line 295 of file z3py.py.

Referenced by Probe.__ne__().

    def __eq__(self, other):
        return self.eq(other)

__hash__()

def __hash__

(

self

)

Definition at line 298 of file z3py.py.

    def __hash__(self):
        return self.hash()

__nonzero__()

def __nonzero__

(

self

)

Definition at line 301 of file z3py.py.

    def __nonzero__(self):
        return self.__bool__()
        

__repr__()

def __repr__

(

self

)

Definition at line 292 of file z3py.py.

    def __repr__(self):
        return obj_to_string(self)

__str__()

def __str__

(

self

)

Definition at line 289 of file z3py.py.

    def __str__(self):
        return obj_to_string(self)

as_ast()

def as_ast

(

self

)

Return a pointer to the corresponding C Z3_ast object.

Definition at line 323 of file z3py.py.

Referenced by AstRef.__del__(), ExprRef.arg(), FiniteDomainRef.as_string(), FiniteDomainNumRef.as_string(), ExprRef.decl(), AstRef.eq(), AstRef.get_id(), SortRef.get_id(), FuncDeclRef.get_id(), ExprRef.get_id(), AstRef.hash(), ExprRef.num_args(), AstRef.sexpr(), ExprRef.sort(), BoolRef.sort(), FiniteDomainRef.sort(), and AstRef.translate().

    def as_ast(self):
        """Return a pointer to the corresponding C Z3_ast object."""
        return self.ast

ctx_ref()

def ctx_ref

(

self

)

Return a reference to the C context where this AST node is stored.

Definition at line 331 of file z3py.py.

Referenced by FuncDeclRef.__call__(), SortRef.__eq__(), ExprRef.__eq__(), SortRef.__ne__(), ExprRef.__ne__(), ExprRef.arg(), FuncDeclRef.arity(), SortRef.as_ast(), FuncDeclRef.as_ast(), FiniteDomainRef.as_string(), FiniteDomainNumRef.as_string(), ExprRef.decl(), FuncDeclRef.domain(), AstRef.eq(), AstRef.get_id(), SortRef.get_id(), FuncDeclRef.get_id(), ExprRef.get_id(), AstRef.hash(), FuncDeclRef.kind(), SortRef.name(), FuncDeclRef.name(), ExprRef.num_args(), FuncDeclRef.params(), FuncDeclRef.range(), AstRef.sexpr(), FiniteDomainSortRef.size(), BoolRef.sort(), and FiniteDomainRef.sort().

    def ctx_ref(self):
        """Return a reference to the C context where this AST node is stored."""
        return self.ctx.ref()

eq()

def eq	(		self,
			other
	)

Return `True` if `self` and `other` are structurally identical.

>>> x = Int('x')
>>> n1 = x + 1
>>> n2 = 1 + x
>>> n1.eq(n2)
False
>>> n1 = simplify(n1)
>>> n2 = simplify(n2)
>>> n1.eq(n2)
True

Definition at line 335 of file z3py.py.

Referenced by AstRef.__bool__(), AstRef.__eq__(), SortRef.cast(), and BoolSortRef.cast().

    def eq(self, other):
        """Return `True` if `self` and `other` are structurally identical.

        >>> x = Int('x')
        >>> n1 = x + 1
        >>> n2 = 1 + x
        >>> n1.eq(n2)
        False
        >>> n1 = simplify(n1)
        >>> n2 = simplify(n2)
        >>> n1.eq(n2)
        True
        """
        if __debug__:
            _z3_assert(is_ast(other), "Z3 AST expected")
        return Z3_is_eq_ast(self.ctx_ref(), self.as_ast(), other.as_ast())

get_id()

def get_id

(

self

)

Return unique identifier for object. It can be used for hash-tables and maps.

Definition at line 327 of file z3py.py.

    def get_id(self):
        """Return unique identifier for object. It can be used for hash-tables and maps."""
        return Z3_get_ast_id(self.ctx_ref(), self.as_ast())

hash()

def hash

(

self

)

Return a hashcode for the `self`.

>>> n1 = simplify(Int('x') + 1)
>>> n2 = simplify(2 + Int('x') - 1)
>>> n1.hash() == n2.hash()
True

Definition at line 368 of file z3py.py.

Referenced by AstRef.__hash__().

    def hash(self):
        """Return a hashcode for the `self`.

        >>> n1 = simplify(Int('x') + 1)
        >>> n2 = simplify(2 + Int('x') - 1)
        >>> n1.hash() == n2.hash()
        True
        """
        return Z3_get_ast_hash(self.ctx_ref(), self.as_ast())

sexpr()

def sexpr

(

self

)

Return a string representing the AST node in s-expression notation.

>>> x = Int('x')
>>> ((x + 1)*x).sexpr()
'(* (+ x 1) x)'

Definition at line 314 of file z3py.py.

Referenced by ArithRef.__div__(), BitVecRef.__div__(), BitVecRef.__ge__(), ArrayRef.__getitem__(), BitVecRef.__gt__(), BitVecRef.__le__(), BitVecRef.__lshift__(), BitVecRef.__lt__(), BitVecRef.__mod__(), ArithRef.__rdiv__(), BitVecRef.__rdiv__(), Fixedpoint.__repr__(), Optimize.__repr__(), BitVecRef.__rlshift__(), BitVecRef.__rmod__(), BitVecRef.__rrshift__(), BitVecRef.__rshift__(), BitVecSortRef.cast(), and FPSortRef.cast().

    def sexpr(self):
        """Return a string representing the AST node in s-expression notation.

        >>> x = Int('x')
        >>> ((x + 1)*x).sexpr()
        '(* (+ x 1) x)'
        """
        return Z3_ast_to_string(self.ctx_ref(), self.as_ast())

translate()

def translate	(		self,
			target
	)

Translate `self` to the context `target`. That is, return a copy of `self` in the context `target`.

>>> c1 = Context()
>>> c2 = Context()
>>> x  = Int('x', c1)
>>> y  = Int('y', c2)
>>> # Nodes in different contexts can't be mixed.
>>> # However, we can translate nodes from one context to another.
>>> x.translate(c2) + y
x + y

Definition at line 352 of file z3py.py.

    def translate(self, target):
        """Translate `self` to the context `target`. That is, return a copy of `self` in the context `target`.

        >>> c1 = Context()
        >>> c2 = Context()
        >>> x  = Int('x', c1)
        >>> y  = Int('y', c2)
        >>> # Nodes in different contexts can't be mixed.
        >>> # However, we can translate nodes from one context to another.
        >>> x.translate(c2) + y
        x + y
        """
        if __debug__:
            _z3_assert(isinstance(target, Context), "argument must be a Z3 context")
        return _to_ast_ref(Z3_translate(self.ctx.ref(), self.as_ast(), target.ref()), target)

Field Documentation

ast

ast

Definition at line 278 of file z3py.py.

Referenced by FuncDeclRef.__call__(), AstRef.__deepcopy__(), SortRef.__eq__(), SortRef.__ne__(), FuncDeclRef.arity(), AstRef.as_ast(), SortRef.as_ast(), FuncDeclRef.as_ast(), ExprRef.as_ast(), FuncDeclRef.as_func_decl(), FuncDeclRef.domain(), SortRef.kind(), FuncDeclRef.kind(), SortRef.name(), FuncDeclRef.name(), FuncDeclRef.params(), FuncDeclRef.range(), and FiniteDomainSortRef.size().

ctx

ctx

Definition at line 279 of file z3py.py.

Referenced by FuncDeclRef.__call__(), Probe.__call__(), AstRef.__deepcopy__(), Fixedpoint.__deepcopy__(), Optimize.__deepcopy__(), ApplyResult.__deepcopy__(), Tactic.__deepcopy__(), Probe.__deepcopy__(), AstRef.__del__(), Fixedpoint.__del__(), Optimize.__del__(), ApplyResult.__del__(), Tactic.__del__(), Probe.__del__(), ExprRef.__eq__(), Probe.__eq__(), Probe.__ge__(), ApplyResult.__getitem__(), Probe.__gt__(), Probe.__le__(), ApplyResult.__len__(), Probe.__lt__(), ExprRef.__ne__(), Probe.__ne__(), Fixedpoint.add_cover(), Fixedpoint.add_rule(), Optimize.add_soft(), Tactic.apply(), ExprRef.arg(), ApplyResult.as_expr(), Fixedpoint.assert_exprs(), Optimize.assert_exprs(), Optimize.assertions(), BoolSortRef.cast(), Optimize.check(), ApplyResult.convert_model(), AstRef.ctx_ref(), ExprRef.decl(), FuncDeclRef.domain(), Optimize.from_file(), Optimize.from_string(), Fixedpoint.get_answer(), Fixedpoint.get_assertions(), Fixedpoint.get_cover_delta(), Fixedpoint.get_ground_sat_answer(), Fixedpoint.get_num_levels(), Fixedpoint.get_rule_names_along_trace(), Fixedpoint.get_rules(), Fixedpoint.get_rules_along_trace(), Fixedpoint.help(), Optimize.help(), Tactic.help(), SortRef.kind(), Optimize.maximize(), Optimize.minimize(), Optimize.model(), SortRef.name(), FuncDeclRef.name(), Optimize.objectives(), Fixedpoint.param_descrs(), Optimize.param_descrs(), Tactic.param_descrs(), FuncDeclRef.params(), Fixedpoint.parse_file(), Fixedpoint.parse_string(), Fixedpoint.pop(), Optimize.pop(), Fixedpoint.push(), Optimize.push(), Fixedpoint.query(), Fixedpoint.query_from_lvl(), FuncDeclRef.range(), Fixedpoint.reason_unknown(), Optimize.reason_unknown(), Fixedpoint.register_relation(), Fixedpoint.set(), Optimize.set(), Fixedpoint.set_predicate_representation(), Fixedpoint.sexpr(), Optimize.sexpr(), ApplyResult.sexpr(), Tactic.solver(), ExprRef.sort(), BoolRef.sort(), FiniteDomainRef.sort(), Fixedpoint.statistics(), Optimize.statistics(), Solver.to_smt2(), Fixedpoint.to_string(), AstRef.translate(), and Fixedpoint.update_rule().