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one must answer the call of the master of compilers #2258

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-05-07 05:49:16 +02:00
parent c012f6ea5b
commit 3e059a3a3b
4 changed files with 119 additions and 34 deletions
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18
src/ast/seq_decl_plugin.cpp
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@ -906,12 +906,18 @@ bool seq_decl_plugin::is_value(app* e) const {
m_manager->is_value(e->get_arg(0))) {
return true;
}
if (is_app_of(e, m_family_id, OP_SEQ_CONCAT) &&
e->get_num_args() == 2 &&
is_app(e->get_arg(0)) &&
is_app(e->get_arg(1)) &&
is_value(to_app(e->get_arg(0)))) {
e = to_app(e->get_arg(1));
if (is_app_of(e, m_family_id, OP_SEQ_CONCAT)) {
bool first = true;
for (expr* arg : *e) {
if (first) {
first = false;
}
else if (is_app(arg) && !is_value(to_app(arg))) {
return false;
}
}
if (!is_app(e->get_arg(0))) return false;
e = to_app(e->get_arg(0));
continue;
}
return false;