IsValid

base/values.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/values.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <cmath>
@@ skipping 179 matching lines @@
   InternalCleanup();
 }
 
 // static
 const char* Value::GetTypeName(Value::Type type) {
   DCHECK_GE(static_cast<int>(type), 0);
   DCHECK_LT(static_cast<size_t>(type), arraysize(kTypeNames));
   return kTypeNames[static_cast<size_t>(type)];
 }
 
+bool Value::IsValid() const {
+  switch (type_) {
+    case Type::NONE:
+    case Type::BOOLEAN:
+    case Type::INTEGER:
+    case Type::DOUBLE:
+    case Type::STRING:
+    case Type::BINARY:
+      return true;
+    case Type::DICTIONARY:
+      return *dict_ptr_ &&
+             std::all_of((*dict_ptr_)->begin(), (*dict_ptr_)->end(),
+                         [](const DictStorage::value_type& val) {
+                           return val.second && val.second->IsValid();
+                         });
+    case Type::LIST:
+      return std::all_of(list_->begin(), list_->end(),
+                         [](const std::unique_ptr<Value>& val) {
+                           return val && val->IsValid();
+                         });
+  }
+
+  NOTREACHED();
+  return false;
+}
+
 bool Value::GetBool() const {
   CHECK(is_bool());
   return bool_value_;
 }
 
 int Value::GetInt() const {
   CHECK(is_int());
   return int_value_;
 }
 
@@ skipping 458 matching lines @@
   Set(path, new Value(in_value));
 }
 
 void DictionaryValue::SetString(StringPiece path, const string16& in_value) {
   Set(path, new Value(in_value));
 }
 
 void DictionaryValue::SetWithoutPathExpansion(StringPiece key,
                                               std::unique_ptr<Value> in_value) {
   (**dict_ptr_)[key.as_string()] = std::move(in_value);
+  CHECK(IsValid());
 }
 
 void DictionaryValue::SetWithoutPathExpansion(StringPiece key,
                                               Value* in_value) {
   SetWithoutPathExpansion(key, WrapUnique(in_value));
 }
 
 void DictionaryValue::SetBooleanWithoutPathExpansion(StringPiece path,
                                                      bool in_value) {
   SetWithoutPathExpansion(path, base::MakeUnique<base::Value>(in_value));
@@ skipping 398 matching lines @@
   if (index >= list_->size()) {
     // Pad out any intermediate indexes with null settings
     while (index > list_->size())
       Append(MakeUnique<Value>());
     Append(std::move(in_value));
   } else {
     // TODO(dcheng): remove this DCHECK once the raw pointer version is removed?
     DCHECK((*list_)[index] != in_value);
     (*list_)[index] = std::move(in_value);
   }
+
+  CHECK(IsValid());
   return true;
 }
 
 bool ListValue::Get(size_t index, const Value** out_value) const {
   if (index >= list_->size())
     return false;
 
   if (out_value)
     *out_value = (*list_)[index].get();
 
@@ skipping 129 matching lines @@
 ListValue::iterator ListValue::Erase(iterator iter,
                                      std::unique_ptr<Value>* out_value) {
   if (out_value)
     *out_value = std::move(*ListStorage::iterator(iter));
 
   return list_->erase(iter);
 }
 
 void ListValue::Append(std::unique_ptr<Value> in_value) {
   list_->push_back(std::move(in_value));
+  CHECK(IsValid());
 }
 
 #if !defined(OS_LINUX)
 void ListValue::Append(Value* in_value) {
   DCHECK(in_value);
   Append(WrapUnique(in_value));
 }
 #endif
 
 void ListValue::AppendBoolean(bool in_value) {
@@ skipping 82 matching lines @@
 }
 
 std::ostream& operator<<(std::ostream& out, const Value::Type& type) {
   if (static_cast<int>(type) < 0 ||
       static_cast<size_t>(type) >= arraysize(kTypeNames))
     return out << "Invalid Type (index = " << static_cast<int>(type) << ")";
   return out << Value::GetTypeName(type);
 }
 
 }  // namespace base