Helper class for declaring Z3 datatypes.
>>> List = Datatype('List')
>>> List.declare('cons', ('car', IntSort()), ('cdr', List))
>>> List.declare('nil')
>>> List = List.create()
>>> # List is now a Z3 declaration
>>> List.nil
nil
>>> List.cons(10, List.nil)
cons(10, nil)
>>> List.cons(10, List.nil).sort()
List
>>> cons = List.cons
>>> nil = List.nil
>>> car = List.car
>>> cdr = List.cdr
>>> n = cons(1, cons(0, nil))
>>> n
cons(1, cons(0, nil))
>>> simplify(cdr(n))
cons(0, nil)
>>> simplify(car(n))
1
Definition at line 4662 of file z3py.py.
Create a Z3 datatype based on the constructors declared using the method `declare()`.
The function `CreateDatatypes()` must be used to define mutually recursive datatypes.
>>> List = Datatype('List')
>>> List.declare('cons', ('car', IntSort()), ('cdr', List))
>>> List.declare('nil')
>>> List = List.create()
>>> List.nil
nil
>>> List.cons(10, List.nil)
cons(10, nil)
Definition at line 4728 of file z3py.py.
Referenced by Datatype.declare().
4729 """Create a Z3 datatype based on the constructors declared using the method `declare()`. 4731 The function `CreateDatatypes()` must be used to define mutually recursive datatypes. 4733 >>> List = Datatype('List') 4734 >>> List.declare('cons', ('car', IntSort()), ('cdr', List)) 4735 >>> List.declare('nil') 4736 >>> List = List.create() 4739 >>> List.cons(10, List.nil)
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Declare constructor named `name` with the given accessors `args`.
Each accessor is a pair `(name, sort)`, where `name` is a string and `sort` a Z3 sort or a reference to the datatypes being declared.
In the following example `List.declare('cons', ('car', IntSort()), ('cdr', List))`
declares the constructor named `cons` that builds a new List using an integer and a List.
It also declares the accessors `car` and `cdr`. The accessor `car` extracts the integer of a `cons` cell,
and `cdr` the list of a `cons` cell. After all constructors were declared, we use the method create() to create
the actual datatype in Z3.
>>> List = Datatype('List')
>>> List.declare('cons', ('car', IntSort()), ('cdr', List))
>>> List.declare('nil')
>>> List = List.create()
Definition at line 4705 of file z3py.py.
Referenced by Datatype.create().
4705 def declare(self, name, *args):
4706 """Declare constructor named `name` with the given accessors `args`. 4707 Each accessor is a pair `(name, sort)`, where `name` is a string and `sort` a Z3 sort or a reference to the datatypes being declared. 4709 In the following example `List.declare('cons', ('car', IntSort()), ('cdr', List))` 4710 declares the constructor named `cons` that builds a new List using an integer and a List. 4711 It also declares the accessors `car` and `cdr`. The accessor `car` extracts the integer of a `cons` cell, 4712 and `cdr` the list of a `cons` cell. After all constructors were declared, we use the method create() to create 4713 the actual datatype in Z3. 4715 >>> List = Datatype('List') 4716 >>> List.declare('cons', ('car', IntSort()), ('cdr', List)) 4717 >>> List.declare('nil') 4718 >>> List = List.create() 4721 _z3_assert(isinstance(name, str),
"String expected")
4722 _z3_assert(name !=
"",
"Constructor name cannot be empty")
4723 return self.declare_core(name,
"is-" + name, *args)