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implementing last-index-of #2089

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-03-22 12:29:34 -07:00
parent 62ec02e50f
commit 3c8fd83c97
10 changed files with 174 additions and 31 deletions
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9
src/api/python/z3/z3.py
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@ -10154,6 +10154,15 @@ def IndexOf(s, substr, offset):
offset = IntVal(offset, ctx)
return ArithRef(Z3_mk_seq_index(s.ctx_ref(), s.as_ast(), substr.as_ast(), offset.as_ast()), s.ctx)
def LastIndexOf(s, substr):
"""Retrieve the last index of substring within a string"""
ctx = None
ctx = _get_ctx2(s, substr, ctx)
s = _coerce_seq(s, ctx)
substr = _coerce_seq(substr, ctx)
return ArithRef(Z3_mk_seq_last_index(s.ctx_ref(), s.as_ast(), substr.as_ast()), s.ctx)
def Length(s):
"""Obtain the length of a sequence 's'
>>> l = Length(StringVal("abc"))