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 6221 of file z3py.py.

Constructor & Destructor Documentation

◆ __init__()

__init__ ( self,
entry,
ctx )

Definition at line 6224 of file z3py.py.

6224 def __init__(self, entry, ctx):
6225 self.entry = entry
6226 self.ctx = ctx
6227 Z3_func_entry_inc_ref(self.ctx.ref(), self.entry)
6228
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 6232 of file z3py.py.

6232 def __del__(self):
6233 if self.ctx.ref() is not None and Z3_func_entry_dec_ref is not None:
6234 Z3_func_entry_dec_ref(self.ctx.ref(), self.entry)
6235
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 6229 of file z3py.py.

6229 def __deepcopy__(self, memo={}):
6230 return FuncEntry(self.entry, self.ctx)
6231

◆ __repr__()

__repr__ ( self)

Definition at line 6326 of file z3py.py.

6326 def __repr__(self):
6327 return repr(self.as_list())
6328
6329

◆ 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 6254 of file z3py.py.

6254 def arg_value(self, idx):
6255 """Return the value of argument `idx`.
6256
6257 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6258 >>> s = Solver()
6259 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6260 >>> s.check()
6261 sat
6262 >>> m = s.model()
6263 >>> f_i = m[f]
6264 >>> f_i.num_entries()
6265 1
6266 >>> e = f_i.entry(0)
6267 >>> e
6268 [1, 2, 20]
6269 >>> e.num_args()
6270 2
6271 >>> e.arg_value(0)
6272 1
6273 >>> e.arg_value(1)
6274 2
6275 >>> try:
6276 ... e.arg_value(2)
6277 ... except IndexError:
6278 ... print("index error")
6279 index error
6280 """
6281 if idx >= self.num_args():
6282 raise IndexError
6283 return _to_expr_ref(Z3_func_entry_get_arg(self.ctx.ref(), self.entry, idx), self.ctx)
6284
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 6307 of file z3py.py.

6307 def as_list(self):
6308 """Return entry `self` as a Python list.
6309 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6310 >>> s = Solver()
6311 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6312 >>> s.check()
6313 sat
6314 >>> m = s.model()
6315 >>> f_i = m[f]
6316 >>> f_i.num_entries()
6317 1
6318 >>> e = f_i.entry(0)
6319 >>> e.as_list()
6320 [1, 2, 20]
6321 """
6322 args = [self.arg_value(i) for i in range(self.num_args())]
6323 args.append(self.value())
6324 return args
6325

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 6236 of file z3py.py.

6236 def num_args(self):
6237 """Return the number of arguments in the given entry.
6238
6239 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6240 >>> s = Solver()
6241 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6242 >>> s.check()
6243 sat
6244 >>> m = s.model()
6245 >>> f_i = m[f]
6246 >>> f_i.num_entries()
6247 1
6248 >>> e = f_i.entry(0)
6249 >>> e.num_args()
6250 2
6251 """
6252 return int(Z3_func_entry_get_num_args(self.ctx.ref(), self.entry))
6253
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 6285 of file z3py.py.

6285 def value(self):
6286 """Return the value of the function at point `self`.
6287
6288 >>> f = Function('f', IntSort(), IntSort(), IntSort())
6289 >>> s = Solver()
6290 >>> s.add(f(0, 1) == 10, f(1, 2) == 20, f(1, 0) == 10)
6291 >>> s.check()
6292 sat
6293 >>> m = s.model()
6294 >>> f_i = m[f]
6295 >>> f_i.num_entries()
6296 1
6297 >>> e = f_i.entry(0)
6298 >>> e
6299 [1, 2, 20]
6300 >>> e.num_args()
6301 2
6302 >>> e.value()
6303 20
6304 """
6305 return _to_expr_ref(Z3_func_entry_get_value(self.ctx.ref(), self.entry), self.ctx)
6306
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 6225 of file z3py.py.

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