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Z3: FuncDeclRef Class Reference

Function Declarations. More...

Function Declarations.

Function declaration. Every constant and function have an associated declaration.

The declaration assigns a name, a sort (i.e., type), and for function
the sort (i.e., type) of each of its arguments. Note that, in Z3,
a constant is a function with 0 arguments.

Definition at line 740 of file z3py.py.

Create a Z3 application expression using the function `self`, and the given arguments.

The arguments must be Z3 expressions. This method assumes that
the sorts of the elements in `args` match the sorts of the
domain. Limited coercion is supported.  For example, if
args[0] is a Python integer, and the function expects a Z3
integer, then the argument is automatically converted into a
Z3 integer.

>>> f = Function('f', IntSort(), RealSort(), BoolSort())
>>> x = Int('x')
>>> y = Real('y')
>>> f(x, y)
f(x, y)
>>> f(x, x)
f(x, ToReal(x))

Definition at line 837 of file z3py.py.

__call__(self, *args):

args = _get_args(args)

_args = (Ast * num)()

i

(num):

tmp = self.domain(i).cast(args[i])

_args[i] = tmp.as_ast()

_to_expr_ref(

(self.ctx_ref(), self.ast, len(args), _args), self.ctx)

Z3_ast Z3_API Z3_mk_app(Z3_context c, Z3_func_decl d, unsigned num_args, Z3_ast const args[])

Create a constant or function application.

expr range(expr const &lo, expr const &hi)

Return the number of arguments of a function declaration.
If `self` is a constant, then `self.arity()` is 0.

>>> f = Function('f', IntSort(), RealSort(), BoolSort())
>>> f.arity()
2

Definition at line 768 of file z3py.py.

unsigned Z3_API Z3_get_arity(Z3_context c, Z3_func_decl d)

Alias for Z3_get_domain_size.

Return a pointer to the corresponding C Z3_ast object.

Reimplemented from AstRef.

Definition at line 748 of file z3py.py.

Z3_ast Z3_API Z3_func_decl_to_ast(Z3_context c, Z3_func_decl f)

Convert a Z3_func_decl into Z3_ast. This is just type casting.

Referenced by AstRef.__del__(), SeqRef.__ge__(), SeqRef.__getitem__(), SeqRef.__gt__(), BitVecRef.__invert__(), SeqRef.__le__(), CharRef.__le__(), SeqRef.__lt__(), ArithRef.__neg__(), BitVecRef.__neg__(), AlgebraicNumRef.approx(), ExprRef.arg(), IntNumRef.as_binary_string(), BitVecNumRef.as_binary_string(), RatNumRef.as_decimal(), AlgebraicNumRef.as_decimal(), IntNumRef.as_string(), RatNumRef.as_string(), BitVecNumRef.as_string(), FiniteDomainRef.as_string(), FiniteDomainNumRef.as_string(), FPRef.as_string(), FPRMRef.as_string(), FPNumRef.as_string(), SeqRef.as_string(), SeqRef.at(), ExprRef.decl(), ArrayRef.default(), RatNumRef.denominator(), AstRef.eq(), FPNumRef.exponent(), FPNumRef.exponent_as_bv(), FPNumRef.exponent_as_long(), AstRef.get_id(), SortRef.get_id(), FuncDeclRef.get_id(), ExprRef.get_id(), PatternRef.get_id(), QuantifierRef.get_id(), AstRef.hash(), AlgebraicNumRef.index(), CharRef.is_digit(), SeqRef.is_string(), SeqRef.is_string_value(), FPNumRef.isInf(), FPNumRef.isNaN(), FPNumRef.isNegative(), FPNumRef.isNormal(), FPNumRef.isPositive(), FPNumRef.isSubnormal(), FPNumRef.isZero(), ExprRef.num_args(), RatNumRef.numerator(), AlgebraicNumRef.poly(), AstRef.sexpr(), FPNumRef.sign(), FPNumRef.sign_as_bv(), FPNumRef.significand(), FPNumRef.significand_as_bv(), FPNumRef.significand_as_long(), ExprRef.sort(), BoolRef.sort(), QuantifierRef.sort(), ArithRef.sort(), BitVecRef.sort(), ArrayRef.sort(), DatatypeRef.sort(), FiniteDomainRef.sort(), FPRef.sort(), SeqRef.sort(), CharRef.to_bv(), CharRef.to_int(), and AstRef.translate().

Definition at line 754 of file z3py.py.

as_func_decl(self):

Return the sort of the argument `i` of a function declaration.
This method assumes that `0 <= i < self.arity()`.

>>> f = Function('f', IntSort(), RealSort(), BoolSort())
>>> f.domain(0)
Int
>>> f.domain(1)
Real

Definition at line 778 of file z3py.py.

_to_sort_ref(

(self.ctx_ref(), self.ast, i), self.ctx)

Z3_sort Z3_API Z3_get_domain(Z3_context c, Z3_func_decl d, unsigned i)

Return the sort of the i-th parameter of the given function declaration.

Referenced by FuncDeclRef.__call__().

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

Reimplemented from AstRef.

Definition at line 751 of file z3py.py.

unsigned Z3_API Z3_get_ast_id(Z3_context c, Z3_ast t)

Return a unique identifier for t. The identifier is unique up to structural equality....

Return the internal kind of a function declaration.
It can be used to identify Z3 built-in functions such as addition, multiplication, etc.

>>> x = Int('x')
>>> d = (x + 1).decl()
>>> d.kind() == Z3_OP_ADD
True
>>> d.kind() == Z3_OP_MUL
False

Definition at line 800 of file z3py.py.

Z3_decl_kind Z3_API Z3_get_decl_kind(Z3_context c, Z3_func_decl d)

Return declaration kind corresponding to declaration.

Referenced by ArithSortRef.is_int(), and ArithSortRef.is_real().

Return the name of the function declaration `self`.

>>> f = Function('f', IntSort(), IntSort())
>>> f.name()
'f'
>>> isinstance(f.name(), str)
True

Definition at line 757 of file z3py.py.

Z3_symbol Z3_API Z3_get_decl_name(Z3_context c, Z3_func_decl d)

Return the constant declaration name as a symbol.

Referenced by Datatype.__deepcopy__(), and Datatype.__repr__().

Definition at line 813 of file z3py.py.

result = [

i

(n)]

k == Z3_PARAMETER_INT:

k == Z3_PARAMETER_DOUBLE:

k == Z3_PARAMETER_RATIONAL:

k == Z3_PARAMETER_SYMBOL:

k == Z3_PARAMETER_SORT:

k == Z3_PARAMETER_AST:

k == Z3_PARAMETER_FUNC_DECL:

Z3_parameter_kind Z3_API Z3_get_decl_parameter_kind(Z3_context c, Z3_func_decl d, unsigned idx)

Return the parameter type associated with a declaration.

Z3_func_decl Z3_API Z3_get_decl_func_decl_parameter(Z3_context c, Z3_func_decl d, unsigned idx)

Return the expression value associated with an expression parameter.

unsigned Z3_API Z3_get_decl_num_parameters(Z3_context c, Z3_func_decl d)

Return the number of parameters associated with a declaration.

Z3_symbol Z3_API Z3_get_decl_symbol_parameter(Z3_context c, Z3_func_decl d, unsigned idx)

Return the double value associated with an double parameter.

int Z3_API Z3_get_decl_int_parameter(Z3_context c, Z3_func_decl d, unsigned idx)

Return the integer value associated with an integer parameter.

double Z3_API Z3_get_decl_double_parameter(Z3_context c, Z3_func_decl d, unsigned idx)

Return the double value associated with an double parameter.

Z3_string Z3_API Z3_get_decl_rational_parameter(Z3_context c, Z3_func_decl d, unsigned idx)

Return the rational value, as a string, associated with a rational parameter.

Z3_sort Z3_API Z3_get_decl_sort_parameter(Z3_context c, Z3_func_decl d, unsigned idx)

Return the sort value associated with a sort parameter.

Z3_ast Z3_API Z3_get_decl_ast_parameter(Z3_context c, Z3_func_decl d, unsigned idx)

Return the expression value associated with an expression parameter.

Referenced by ParamsRef.__deepcopy__(), ParamsRef.__del__(), ParamsRef.__repr__(), ParamsRef.set(), and ParamsRef.validate().

Return the sort of the range of a function declaration.
For constants, this is the sort of the constant.

>>> f = Function('f', IntSort(), RealSort(), BoolSort())
>>> f.range()
Bool

Definition at line 790 of file z3py.py.

_to_sort_ref(

(self.ctx_ref(), self.ast), self.ctx)

Z3_sort Z3_API Z3_get_range(Z3_context c, Z3_func_decl d)

Return the range of the given declaration.

Referenced by FuncDeclRef.__call__(), and FuncDeclRef.params().

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