Issue 5013 - Improve some const-correctness

src/JsValue.cpp

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 121 matching lines @@
 
 std::vector<std::string> AdblockPlus::JsValue::GetOwnPropertyNames() const
 {
   if (!IsObject())
     throw new std::runtime_error("Attempting to get propert list for a non-object");
 
   const JsContext context(jsEngine);
   v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(UnwrapValue());
   JsValueList properties = JsValuePtr(new JsValue(jsEngine, object->GetOwnPropertyNames()))->AsList();
   std::vector<std::string> result;
-  for (JsValueList::iterator it = properties.begin(); it != properties.end(); ++it)
-    result.push_back((*it)->AsString());
+  for (const auto& property : properties)
+    result.push_back(property->AsString());
   return result;
 }
 
 
 AdblockPlus::JsValuePtr AdblockPlus::JsValue::GetProperty(const std::string& name) const
 {
   if (!IsObject())
     throw new std::runtime_error("Attempting to get property of a non-object");
 
   const JsContext context(jsEngine);
@@ skipping 61 matching lines @@
   {
     v8::Local<v8::Context> localContext = v8::Local<v8::Context>::New(
       jsEngine->GetIsolate(), *jsEngine->context);
     thisPtr = JsValuePtr(new JsValue(jsEngine, localContext->Global()));
   }
   if (!thisPtr->IsObject())
     throw new std::runtime_error("`this` pointer has to be an object");
   v8::Local<v8::Object> thisObj = v8::Local<v8::Object>::Cast(thisPtr->UnwrapValue());
 
   std::vector<v8::Handle<v8::Value>> argv;
-  for (JsValueList::const_iterator it = params.begin(); it != params.end(); ++it)
-    argv.push_back((*it)->UnwrapValue());
+  for (const auto& param : params)
+    argv.push_back(param->UnwrapValue());
 
   const v8::TryCatch tryCatch;
   v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(UnwrapValue());
   v8::Local<v8::Value> result = func->Call(thisObj, argv.size(),
       argv.size() ? &argv.front() : 0);
 
   if (tryCatch.HasCaught())
     throw JsError(tryCatch.Exception(), tryCatch.Message());
 
   return JsValuePtr(new JsValue(jsEngine, result));
 }
 
 AdblockPlus::JsValuePtr AdblockPlus::JsValue::Call(const JsValue& arg) const
 {
   const JsContext context(jsEngine);
   JsValueList params;
   params.push_back(JsValuePtr(new JsValue(arg.jsEngine, arg.UnwrapValue())));
   return Call(params);
 }