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remove iff

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-05-16 18:35:38 -07:00 • committed by Arie Gurfinkel
parent ecf15ab07d
commit ff0f257102
47 changed files with 199 additions and 264 deletions
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9
src/ast/macros/macro_util.cpp
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@ -175,7 +175,7 @@ bool macro_util::is_macro_head(expr * n, unsigned num_decls) const {
*/
bool macro_util::is_left_simple_macro(expr * n, unsigned num_decls, app_ref & head, expr_ref & def) const {
if (m_manager.is_eq(n) || m_manager.is_iff(n)) {
if (m_manager.is_eq(n)) {
expr * lhs = to_app(n)->get_arg(0);
expr * rhs = to_app(n)->get_arg(1);
if (is_macro_head(lhs, num_decls) && !is_forbidden(to_app(lhs)->get_decl()) &&
@ -207,7 +207,7 @@ bool macro_util::is_left_simple_macro(expr * n, unsigned num_decls, app_ref & he
*/
bool macro_util::is_right_simple_macro(expr * n, unsigned num_decls, app_ref & head, expr_ref & def) const {
if (m_manager.is_eq(n) || m_manager.is_iff(n)) {
if (m_manager.is_eq(n)) {
expr * lhs = to_app(n)->get_arg(0);
expr * rhs = to_app(n)->get_arg(1);
if (is_macro_head(rhs, num_decls) && !is_forbidden(to_app(rhs)->get_decl()) &&
@ -339,10 +339,9 @@ bool macro_util::is_pseudo_predicate_macro(expr * n, app_ref & head, app_ref & t
TRACE("macro_util", tout << "processing: " << mk_pp(n, m_manager) << "\n";);
expr * body = to_quantifier(n)->get_expr();
unsigned num_decls = to_quantifier(n)->get_num_decls();
if (!m_manager.is_iff(body))
expr * lhs, *rhs;
if (!m_manager.is_iff(body, lhs, rhs))
return false;
expr * lhs = to_app(body)->get_arg(0);
expr * rhs = to_app(body)->get_arg(1);
if (is_pseudo_head(lhs, num_decls, head, t) &&
!is_forbidden(head->get_decl()) &&
!occurs(head->get_decl(), rhs)) {