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access parameters from Python API

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-01-19 19:28:20 -08:00
parent 735998c386
commit e23509797a
1 changed files with 31 additions and 0 deletions
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31
src/api/python/z3/z3.py
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@ -691,6 +691,30 @@ class FuncDeclRef(AstRef):
"""
return Z3_get_decl_kind(self.ctx_ref(), self.ast)
def params(self):
ctx = self.ctx
n = Z3_get_decl_num_parameters(self.ctx_ref(), self.ast)
result = [ None for i in range(n) ]
for i in range(n):
k = Z3_get_decl_parameter_kind(self.ctx_ref(), self.ast, i)
if k == Z3_PARAMETER_INT:
result[i] = Z3_get_decl_int_parameter(self.ctx_ref(), self.ast, i)
elif k == Z3_PARAMETER_DOUBLE:
result[i] = Z3_get_decl_double_parameter(self.ctx_ref(), self.ast, i)
elif k == Z3_PARAMETER_RATIONAL:
result[i] = Z3_get_decl_rational_parameter(self.ctx_ref(), self.ast, i)
elif k == Z3_PARAMETER_SYMBOL:
result[i] = Z3_get_decl_symbol_parameter(self.ctx_ref(), self.ast, i)
elif k == Z3_PARAMETER_SORT:
result[i] = SortRef(Z3_get_decl_sort_parameter(self.ctx_ref(), self.ast, i), ctx)
elif k == Z3_PARAMETER_AST:
result[i] = ExprRef(Z3_get_decl_ast_parameter(self.ctx_ref(), self.ast, i), ctx)
elif k == Z3_PARAMETER_FUNC_DECL:
result[i] = FuncDeclRef(Z3_get_decl_func_decl_parameter(self.ctx_ref(), self.ast, i), ctx)
else:
assert(False)
return result
def __call__(self, *args):
"""Create a Z3 application expression using the function `self`, and the given arguments.
@ -2637,6 +2661,13 @@ class RatNumRef(ArithRef):
"""
return self.denominator().as_long()
def is_int(self):
return self.denominator().is_int() and self.denominator_as_long() == 1
def as_long(self):
_z3_assert(self.is_int(), "Expected integer fraction")
return self.numerator_as_long()
def as_decimal(self, prec):
""" Return a Z3 rational value as a string in decimal notation using at most `prec` decimal places.