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extend macro detection to negated equivalences #5496

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This commit is contained in:
Nikolaj Bjorner 2021-08-25 17:47:30 -07:00
parent f03d756e08
commit e6264a80ff
5 changed files with 64 additions and 17 deletions
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16
src/ast/macros/macro_util.cpp
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@ -184,6 +184,14 @@ bool macro_util::is_left_simple_macro(expr * n, unsigned num_decls, app_ref & he
def = rhs;
return true;
}
if (m_manager.is_not(n, lhs) && m_manager.is_eq(lhs, lhs, rhs) &&
is_macro_head(lhs, num_decls) &&
!is_forbidden(to_app(lhs)->get_decl()) &&
!occurs(to_app(lhs)->get_decl(), rhs)) {
head = to_app(lhs);
def = m_manager.mk_not(rhs);
return true;
}
return false;
}
@ -215,6 +223,14 @@ bool macro_util::is_right_simple_macro(expr * n, unsigned num_decls, app_ref & h
def = lhs;
return true;
}
if (m_manager.is_not(n, n) && m_manager.is_eq(n, lhs, rhs) &&
is_macro_head(rhs, num_decls) &&
!is_forbidden(to_app(rhs)->get_decl()) &&
!occurs(to_app(rhs)->get_decl(), lhs)) {
head = to_app(rhs);
def = m_manager.mk_not(lhs);
return true;
}
return false;
}