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Merge pull request #603 from manueljacob/master

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Expose Z3_mk_bv2int's is_signed parameter in Python API.
This commit is contained in:
Nikolaj Bjorner 2016-05-16 07:56:37 -07:00
parent beda356e32 7e3dfb4617
commit 121f79b198
1 changed files with 6 additions and 2 deletions
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8
src/api/python/z3.py
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@ -3468,7 +3468,7 @@ def is_bv_value(a):
"""
return is_bv(a) and _is_numeral(a.ctx, a.as_ast())
def BV2Int(a):
def BV2Int(a, is_signed=False):
"""Return the Z3 expression BV2Int(a).
>>> b = BitVec('b', 3)
@ -3477,6 +3477,10 @@ def BV2Int(a):
>>> x = Int('x')
>>> x > BV2Int(b)
x > BV2Int(b)
>>> x > BV2Int(b, is_signed=False)
x > BV2Int(b)
>>> x > BV2Int(b, is_signed=True)
x > If(b < 0, BV2Int(b) - 8, BV2Int(b))
>>> solve(x > BV2Int(b), b == 1, x < 3)
[b = 1, x = 2]
"""
@ -3484,7 +3488,7 @@ def BV2Int(a):
_z3_assert(is_bv(a), "Z3 bit-vector expression expected")
ctx = a.ctx
## investigate problem with bv2int
return ArithRef(Z3_mk_bv2int(ctx.ref(), a.as_ast(), 0), ctx)
return ArithRef(Z3_mk_bv2int(ctx.ref(), a.as_ast(), is_signed), ctx)
def BitVecSort(sz, ctx=None):
"""Return a Z3 bit-vector sort of the given size. If `ctx=None`, then the global context is used.