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adding comparison #2360

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-06-28 21:14:58 -07:00
parent db274ebe01
commit 335543b374
9 changed files with 143 additions and 4 deletions
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19
src/api/python/z3/z3.py
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@ -9990,6 +9990,18 @@ class SeqRef(ExprRef):
return Z3_get_string(self.ctx_ref(), self.as_ast())
return Z3_ast_to_string(self.ctx_ref(), self.as_ast())
def __le__(self, other):
return SeqRef(Z3_mk_str_le(self.ctx_ref(), self.as_ast(), other.as_ast()), self.ctx)
def __lt__(self, other):
return SeqRef(Z3_mk_str_lt(self.ctx_ref(), self.as_ast(), other.as_ast()), self.ctx)
def __ge__(self, other):
return SeqRef(Z3_mk_str_le(self.ctx_ref(), other.as_ast(), self.as_ast()), self.ctx)
def __gt__(self, other):
return SeqRef(Z3_mk_str_lt(self.ctx_ref(), other.as_ast(), self.as_ast()), self.ctx)
def _coerce_seq(s, ctx=None):
if isinstance(s, str):
@ -10049,6 +10061,13 @@ def String(name, ctx=None):
ctx = _get_ctx(ctx)
return SeqRef(Z3_mk_const(ctx.ref(), to_symbol(name, ctx), StringSort(ctx).ast), ctx)
def Strings(names, ctx=None):
"""Return string constants"""
ctx = _get_ctx(ctx)
if isinstance(names, str):
names = names.split(" ")
return [String(name, ctx) for name in names]
def SubString(s, offset, length):
"""Extract substring or subsequence starting at offset"""
return Extract(s, offset, length)