added API to monitor clause inferences

See RELEASE_NOTES for more information
examples pending.

src/ast/ast.cpp

@@ -1969,6 +1969,14 @@ app * ast_manager::mk_app(family_id fid, decl_kind k, expr * arg1, expr * arg2,
     return mk_app(fid, k, 0, nullptr, 3, args);
 }
 
+app * ast_manager::mk_app(symbol const& name, unsigned n, expr* const* args, sort* range) {
+    ptr_buffer<sort> sorts;
+    for (unsigned i = 0; i < n; ++i)
+        sorts.push_back(args[i]->get_sort());
+    return mk_app(mk_func_decl(name, n, sorts.data(), range), n, args);
+}
+
+
 sort * ast_manager::mk_sort(symbol const & name, sort_info * info) {
     unsigned sz      = sort::get_obj_size();
     void * mem       = allocate_node(sz);

src/ast/ast.h

@@ -1883,6 +1883,8 @@ public:
         return mk_app(decl, 3, args);
     }
 
+    app * mk_app(symbol const& name, unsigned n, expr* const* args, sort* range);
+
     app * mk_const(func_decl * decl) {
         SASSERT(decl->get_arity() == 0);
         return mk_app(decl, static_cast<unsigned>(0), static_cast<expr**>(nullptr));

src/ast/ast_ll_pp.cpp

@@ -86,6 +86,7 @@ class ll_printer {
         default:
             display_child_ref(n);
         }
+
     }
 
     template<typename T>