Merge #10742: scripted-diff: Use scoped enumerations (C++11, "enum class")

1f45e21 scripted-diff: Convert 11 enums into scoped enums (C++11) (practicalswift)

Pull request description:

  Rationale (from Bjarne Stroustrup's ["C++11 FAQ"](http://www.stroustrup.com/C++11FAQ.html#enum)):

  >
  > The enum classes ("new enums", "strong enums") address three problems with traditional C++ enumerations:
  >
  > * conventional enums implicitly convert to int, causing errors when someone does not want an enumeration to act as an integer.
  > * conventional enums export their enumerators to the surrounding scope, causing name clashes.
  > * the underlying type of an enum cannot be specified, causing confusion, compatibility problems, and makes forward declaration impossible.
  >
  > The new enums are "enum class" because they combine aspects of traditional enumerations (names values) with aspects of classes (scoped members and absence of conversions).

Tree-SHA512: 9656e1cf4c3cabd4378c7a38d0c2eaf79e4a54d204a3c5762330840e55ee7e141e188a3efb2b4daf0ef3110bbaff80d8b9253abf2a9b015cdc4d60b49ac2b914

src/qt/bitcoingui.cpp

@@ -799,7 +799,7 @@ void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVer
     // Acquire current block source
     enum BlockSource blockSource = clientModel->getBlockSource();
     switch (blockSource) {
-        case BLOCK_SOURCE_NETWORK:
+        case BlockSource::NETWORK:
             if (header) {
                 updateHeadersSyncProgressLabel();
                 return;
@@ -807,17 +807,17 @@ void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVer
             progressBarLabel->setText(tr("Synchronizing with network..."));
             updateHeadersSyncProgressLabel();
             break;
-        case BLOCK_SOURCE_DISK:
+        case BlockSource::DISK:
             if (header) {
                 progressBarLabel->setText(tr("Indexing blocks on disk..."));
             } else {
                 progressBarLabel->setText(tr("Processing blocks on disk..."));
             }
             break;
-        case BLOCK_SOURCE_REINDEX:
+        case BlockSource::REINDEX:
             progressBarLabel->setText(tr("Reindexing blocks on disk..."));
             break;
-        case BLOCK_SOURCE_NONE:
+        case BlockSource::NONE:
             if (header) {
                 return;
             }