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 6230 of file z3py.py.

Constructor & Destructor Documentation

◆ __init__()

__init__ ( self,
entry,
ctx )

Definition at line 6233 of file z3py.py.

6233 def __init__(self, entry, ctx):
6234 self.entry = entry
6235 self.ctx = ctx
6236 Z3_func_entry_inc_ref(self.ctx.ref(), self.entry)
6237
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 6241 of file z3py.py.

6241 def __del__(self):
6242 if self.ctx.ref() is not None and Z3_func_entry_dec_ref is not None:
6243 Z3_func_entry_dec_ref(self.ctx.ref(), self.entry)
6244
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 6238 of file z3py.py.

6238 def __deepcopy__(self, memo={}):
6239 return FuncEntry(self.entry, self.ctx)
6240

◆ __repr__()

__repr__ ( self)

Definition at line 6335 of file z3py.py.

6335 def __repr__(self):
6336 return repr(self.as_list())
6337
6338

◆ 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 6263 of file z3py.py.

6263 def arg_value(self, idx):
6264 """Return the value of argument `idx`.
6265
6266 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6267 >>> s = Solver()
6268 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6269 >>> s.check()
6270 sat
6271 >>> m = s.model()
6272 >>> f_i = m[f]
6273 >>> f_i.num_entries()
6274 1
6275 >>> e = f_i.entry(0)
6276 >>> e
6277 [1, 2, 20]
6278 >>> e.num_args()
6279 2
6280 >>> e.arg_value(0)
6281 1
6282 >>> e.arg_value(1)
6283 2
6284 >>> try:
6285 ... e.arg_value(2)
6286 ... except IndexError:
6287 ... print("index error")
6288 index error
6289 """
6290 if idx >= self.num_args():
6291 raise IndexError
6292 return _to_expr_ref(Z3_func_entry_get_arg(self.ctx.ref(), self.entry, idx), self.ctx)
6293
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 6316 of file z3py.py.

6316 def as_list(self):
6317 """Return entry `self` as a Python list.
6318 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6319 >>> s = Solver()
6320 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6321 >>> s.check()
6322 sat
6323 >>> m = s.model()
6324 >>> f_i = m[f]
6325 >>> f_i.num_entries()
6326 1
6327 >>> e = f_i.entry(0)
6328 >>> e.as_list()
6329 [1, 2, 20]
6330 """
6331 args = [self.arg_value(i) for i in range(self.num_args())]
6332 args.append(self.value())
6333 return args
6334

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 6245 of file z3py.py.

6245 def num_args(self):
6246 """Return the number of arguments in the given entry.
6247
6248 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6249 >>> s = Solver()
6250 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6251 >>> s.check()
6252 sat
6253 >>> m = s.model()
6254 >>> f_i = m[f]
6255 >>> f_i.num_entries()
6256 1
6257 >>> e = f_i.entry(0)
6258 >>> e.num_args()
6259 2
6260 """
6261 return int(Z3_func_entry_get_num_args(self.ctx.ref(), self.entry))
6262
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 6294 of file z3py.py.

6294 def value(self):
6295 """Return the value of the function at point `self`.
6296
6297 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6298 >>> s = Solver()
6299 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6300 >>> s.check()
6301 sat
6302 >>> m = s.model()
6303 >>> f_i = m[f]
6304 >>> f_i.num_entries()
6305 1
6306 >>> e = f_i.entry(0)
6307 >>> e
6308 [1, 2, 20]
6309 >>> e.num_args()
6310 2
6311 >>> e.value()
6312 20
6313 """
6314 return _to_expr_ref(Z3_func_entry_get_value(self.ctx.ref(), self.entry), self.ctx)
6315
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 6234 of file z3py.py.

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