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seq + API

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-04 18:01:48 -08:00
parent 68a532d066
commit c1ebf6b4fc
9 changed files with 484 additions and 77 deletions
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28
src/api/python/z3.py
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@ -8991,7 +8991,7 @@ class SeqRef(ExprRef):
def __getitem__(self, i):
return SeqRef(Z3_mk_seq_at(self.ctx_ref(), self.as_ast(), i.as_ast()), self.ctx)
def is_string_sort(self):
def is_string(self):
return Z3_is_string_sort(self.ctx_ref(), Z3_get_sort(self.ctx_ref(), self.as_ast()))
def is_string_value(self):
@ -9026,12 +9026,12 @@ def is_seq(a):
"""
return isinstance(a, SeqRef)
def is_string_sort(a):
def is_string(a):
"""Return `True` if `a` is a Z3 string expression.
>>> print (is_string_sort(StringVal("ab")))
>>> print (is_string(StringVal("ab")))
True
"""
return isinstance(a, SeqRef) and a.is_string_sort()
return isinstance(a, SeqRef) and a.is_string()
def is_string_value(a):
"""return 'True' if 'a' is a Z3 string constant expression.
@ -9042,11 +9042,27 @@ def is_string_value(a):
"""
return isinstance(a, SeqRef) and a.is_string_value()
def StringVal(s, ctx=None):
"""create a string expression"""
ctx = _get_ctx(ctx)
return SeqRef(Z3_mk_string(ctx.ref(), s), ctx)
def String(name, ctx=None):
"""Return a string constant named `name`. If `ctx=None`, then the global context is used.
>>> x = String('x')
"""
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 a tuple of String constants. """
ctx = _get_ctx(ctx)
if isinstance(names, str):
names = names.split(" ")
return [String(name, ctx) for name in names]
def Empty(s):
"""Create the empty sequence of the given sort
>>> e = Empty(StringSort())
@ -9101,6 +9117,10 @@ def Contains(a, b):
>>> s2 = Contains("abc", "bc")
>>> simplify(s2)
True
>>> x, y, z = Strings('x y z')
>>> s3 = Contains(Concat(x,y,z), y)
>>> simplify(s3)
True
"""
ctx = _get_ctx2(a, b)
a = _coerce_seq(a, ctx)