Do not output an empty comment for an empty stack.

[cycript.git] / List.hpp

diff --git a/List.hpp b/List.hpp
index 6fd07312729b054a8486cfe9123baadb4ee5d4ae..d2acedf63e26a327e11ce5f4359e6a27fc6d5b24 100644 (file)
--- a/List.hpp
+++ b/List.hpp
@@ -1,27 +1,29 @@
-/* Cycript - Optimizing JavaScript Compiler/Runtime
- * Copyright (C) 2009-2012  Jay Freeman (saurik)
+/* Cycript - The Truly Universal Scripting Language
+ * Copyright (C) 2009-2016  Jay Freeman (saurik)
 */
 
-/* GNU Lesser General Public License, Version 3 {{{ */
+/* GNU Affero General Public License, Version 3 {{{ */
 /*
- * Cycript is free software: you can redistribute it and/or modify it under
- * the terms of the GNU Lesser General Public License as published by the
- * Free Software Foundation, either version 3 of the License, or (at your
- * option) any later version.
- *
- * Cycript is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
- * License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 **/
 /* }}} */
 
 #ifndef CYCRIPT_LIST_HPP
 #define CYCRIPT_LIST_HPP
 
+#include "Exception.hpp"
+
 template <typename Type_>
 struct CYNext {
     Type_ *next_;
@@ -53,16 +55,71 @@ Type_ *&CYSetLast(Type_ *&list) {
 }
 
 template <typename Type_>
-Type_ *CYGetLast(Type_ *list) {
+Type_ *&CYGetLast(Type_ *&list) {
     if (list == NULL)
-        return NULL;
+        return list;
 
-    Type_ *next(list);
-    while (next->next_ != NULL)
-        next = next->next_;
-    return next;
+    Type_ **next(&list);
+    while ((*next)->next_ != NULL)
+        next = &(*next)->next_;
+    return *next;
 }
 
+template <typename Type_>
+struct CYList {
+    Type_ *first_;
+    Type_ *last_;
+
+    CYList() :
+        first_(NULL),
+        last_(NULL)
+    {
+    }
+
+    CYList(Type_ *first) :
+        first_(first),
+        last_(CYGetLast(first))
+    {
+    }
+
+    CYList(Type_ *first, Type_ *last) :
+        first_(first),
+        last_(last)
+    {
+    }
+
+    operator Type_ *() const {
+        return first_;
+    }
+
+    Type_ *operator ->() const {
+        return first_;
+    }
+
+    CYList &operator ->*(Type_ *next) {
+        if (next != NULL)
+            if (first_ == NULL) {
+                first_ = next;
+                last_ = next;
+            } else {
+                _assert(last_->next_ == NULL);
+                last_->next_ = next;
+                last_ = next;
+            }
+        return *this;
+    }
+
+    CYList &operator ->*(CYList &next) {
+        if (*this == NULL)
+            *this = next;
+        else if (next != NULL) {
+            last_->next_ = next.first_;
+            last_ = next.last_;
+        }
+        return *this;
+    }
+};
+
 #define CYForEach(value, list) \
     for (__typeof__(*list) *value(list); value != NULL; value = value->next_)