Z3
 
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FuncEntry Class Reference

Public Member Functions

 __init__ (self, entry, ctx)
 
 __deepcopy__ (self, memo={})
 
 __del__ (self)
 
 num_args (self)
 
 arg_value (self, idx)
 
 value (self)
 
 as_list (self)
 
 __repr__ (self)
 

Data Fields

 entry = entry
 
 ctx = ctx
 

Detailed Description

Store the value of the interpretation of a function in a particular point.

Definition at line 6193 of file z3py.py.

Constructor & Destructor Documentation

◆ __init__()

__init__ ( self,
entry,
ctx )

Definition at line 6196 of file z3py.py.

6196 def __init__(self, entry, ctx):
6197 self.entry = entry
6198 self.ctx = ctx
6199 Z3_func_entry_inc_ref(self.ctx.ref(), self.entry)
6200
void Z3_API Z3_func_entry_inc_ref(Z3_context c, Z3_func_entry e)
Increment the reference counter of the given Z3_func_entry object.

◆ __del__()

__del__ ( self)

Definition at line 6204 of file z3py.py.

6204 def __del__(self):
6205 if self.ctx.ref() is not None and Z3_func_entry_dec_ref is not None:
6206 Z3_func_entry_dec_ref(self.ctx.ref(), self.entry)
6207
void Z3_API Z3_func_entry_dec_ref(Z3_context c, Z3_func_entry e)
Decrement the reference counter of the given Z3_func_entry object.

Member Function Documentation

◆ __deepcopy__()

__deepcopy__ ( self,
memo = {} )

Definition at line 6201 of file z3py.py.

6201 def __deepcopy__(self, memo={}):
6202 return FuncEntry(self.entry, self.ctx)
6203

◆ __repr__()

__repr__ ( self)

Definition at line 6298 of file z3py.py.

6298 def __repr__(self):
6299 return repr(self.as_list())
6300
6301

◆ arg_value()

arg_value ( self,
idx )
Return the value of argument `idx`.

>>> f = Function('f', IntSort(), IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
>>> s.check()
sat
>>> m = s.model()
>>> f_i = m[f]
>>> f_i.num_entries()
1
>>> e = f_i.entry(0)
>>> e
[1, 2, 20]
>>> e.num_args()
2
>>> e.arg_value(0)
1
>>> e.arg_value(1)
2
>>> try:
...   e.arg_value(2)
... except IndexError:
...   print("index error")
index error

Definition at line 6226 of file z3py.py.

6226 def arg_value(self, idx):
6227 """Return the value of argument `idx`.
6228
6229 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6230 >>> s = Solver()
6231 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6232 >>> s.check()
6233 sat
6234 >>> m = s.model()
6235 >>> f_i = m[f]
6236 >>> f_i.num_entries()
6237 1
6238 >>> e = f_i.entry(0)
6239 >>> e
6240 [1, 2, 20]
6241 >>> e.num_args()
6242 2
6243 >>> e.arg_value(0)
6244 1
6245 >>> e.arg_value(1)
6246 2
6247 >>> try:
6248 ... e.arg_value(2)
6249 ... except IndexError:
6250 ... print("index error")
6251 index error
6252 """
6253 if idx >= self.num_args():
6254 raise IndexError
6255 return _to_expr_ref(Z3_func_entry_get_arg(self.ctx.ref(), self.entry, idx), self.ctx)
6256
Z3_ast Z3_API Z3_func_entry_get_arg(Z3_context c, Z3_func_entry e, unsigned i)
Return an argument of a Z3_func_entry object.

Referenced by as_list().

◆ as_list()

as_list ( self)
Return entry `self` as a Python list.
>>> f = Function('f', IntSort(), IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
>>> s.check()
sat
>>> m = s.model()
>>> f_i = m[f]
>>> f_i.num_entries()
1
>>> e = f_i.entry(0)
>>> e.as_list()
[1, 2, 20]

Definition at line 6279 of file z3py.py.

6279 def as_list(self):
6280 """Return entry `self` as a Python list.
6281 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6282 >>> s = Solver()
6283 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6284 >>> s.check()
6285 sat
6286 >>> m = s.model()
6287 >>> f_i = m[f]
6288 >>> f_i.num_entries()
6289 1
6290 >>> e = f_i.entry(0)
6291 >>> e.as_list()
6292 [1, 2, 20]
6293 """
6294 args = [self.arg_value(i) for i in range(self.num_args())]
6295 args.append(self.value())
6296 return args
6297

Referenced by __repr__().

◆ num_args()

num_args ( self)
Return the number of arguments in the given entry.

>>> f = Function('f', IntSort(), IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
>>> s.check()
sat
>>> m = s.model()
>>> f_i = m[f]
>>> f_i.num_entries()
1
>>> e = f_i.entry(0)
>>> e.num_args()
2

Definition at line 6208 of file z3py.py.

6208 def num_args(self):
6209 """Return the number of arguments in the given entry.
6210
6211 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6212 >>> s = Solver()
6213 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6214 >>> s.check()
6215 sat
6216 >>> m = s.model()
6217 >>> f_i = m[f]
6218 >>> f_i.num_entries()
6219 1
6220 >>> e = f_i.entry(0)
6221 >>> e.num_args()
6222 2
6223 """
6224 return int(Z3_func_entry_get_num_args(self.ctx.ref(), self.entry))
6225
unsigned Z3_API Z3_func_entry_get_num_args(Z3_context c, Z3_func_entry e)
Return the number of arguments in a Z3_func_entry object.

Referenced by AstRef.__bool__(), arg_value(), and as_list().

◆ value()

value ( self)
Return the value of the function at point `self`.

>>> f = Function('f', IntSort(), IntSort(), IntSort())
>>> s = Solver()
>>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
>>> s.check()
sat
>>> m = s.model()
>>> f_i = m[f]
>>> f_i.num_entries()
1
>>> e = f_i.entry(0)
>>> e
[1, 2, 20]
>>> e.num_args()
2
>>> e.value()
20

Definition at line 6257 of file z3py.py.

6257 def value(self):
6258 """Return the value of the function at point `self`.
6259
6260 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6261 >>> s = Solver()
6262 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6263 >>> s.check()
6264 sat
6265 >>> m = s.model()
6266 >>> f_i = m[f]
6267 >>> f_i.num_entries()
6268 1
6269 >>> e = f_i.entry(0)
6270 >>> e
6271 [1, 2, 20]
6272 >>> e.num_args()
6273 2
6274 >>> e.value()
6275 20
6276 """
6277 return _to_expr_ref(Z3_func_entry_get_value(self.ctx.ref(), self.entry), self.ctx)
6278
Z3_ast Z3_API Z3_func_entry_get_value(Z3_context c, Z3_func_entry e)
Return the value of this point.

Referenced by as_list().

Field Documentation

◆ ctx

◆ entry

entry = entry

Definition at line 6197 of file z3py.py.

Referenced by __deepcopy__(), __del__(), arg_value(), FuncInterp.as_list(), num_args(), and value().