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enable nested ADT and sequences

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add API to define forward reference to recursively defined datatype.
The forward reference should be used only when passed to constructor declarations that are used in a datatype definition (Z3_mk_datatypes). The call to Z3_mk_datatypes ensures that the forward reference can be resolved with respect to constructors.
This commit is contained in:
Nikolaj Bjorner 2022-04-27 09:58:38 +01:00
parent 8e2f09b517
commit 81d97a81af
10 changed files with 232 additions and 92 deletions
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src/model/datatype_factory.cpp
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@ -166,7 +166,7 @@ expr * datatype_factory::get_fresh_value(sort * s) {
for (unsigned i = 0; i < num; i++) {
sort * s_arg = constructor->get_domain(i);
if (!found_fresh_arg &&
!m_util.is_recursive_array(s_arg) &&
!m_util.is_recursive_nested(s_arg) &&
(!m_util.is_recursive(s) || !m_util.is_datatype(s_arg) || !m_util.are_siblings(s, s_arg))) {
expr * new_arg = m_model.get_fresh_value(s_arg);
if (new_arg != nullptr) {