Merge #20480: Replace boost::variant with std::variant

faa8f68943 Replace boost::variant with std::variant (MarcoFalke)

Pull request description:

  Now that we can use std::variant from the vanilla standard library, drop the third-party boost variant dependency

ACKs for top commit:
  fjahr:
    Code review ACK faa8f68943
  fanquake:
    ACK faa8f68943

Tree-SHA512: 6e3aecd33b00c2e31a763f999247944d5b2ce5e3018f1965c516c1000cd08ff6703a8d50fb0be64883153da2925ae72986b8a6b96586db74057bd05d6f4986e6

src/qt/addresstablemodel.cpp

@@ -11,7 +11,6 @@
 #include <wallet/wallet.h>
 
 #include <algorithm>
-#include <typeinfo>
 
 #include <QFont>
 #include <QDebug>
@@ -82,8 +81,9 @@ public:
         {
             for (const auto& address : wallet.getAddresses())
             {
-                if (pk_hash_only && address.dest.type() != typeid(PKHash))
+                if (pk_hash_only && !std::holds_alternative<PKHash>(address.dest)) {
                     continue;
+                }
                 AddressTableEntry::Type addressType = translateTransactionType(
                         QString::fromStdString(address.purpose), address.is_mine);
                 cachedAddressTable.append(AddressTableEntry(addressType,
@@ -261,7 +261,7 @@ bool AddressTableModel::setData(const QModelIndex &index, const QVariant &value,
         } else if(index.column() == Address) {
             CTxDestination newAddress = DecodeDestination(value.toString().toStdString());
             // Refuse to set invalid address, set error status and return false
-            if(boost::get<CNoDestination>(&newAddress))
+            if(std::get_if<CNoDestination>(&newAddress))
             {
                 editStatus = INVALID_ADDRESS;
                 return false;

src/qt/coincontroldialog.cpp

@@ -455,7 +455,7 @@ void CoinControlDialog::updateLabels(CCoinControl& m_coin_control, WalletModel *
         else if(ExtractDestination(out.txout.scriptPubKey, address))
         {
             CPubKey pubkey;
-            PKHash *pkhash = boost::get<PKHash>(&address);
+            PKHash* pkhash = std::get_if<PKHash>(&address);
             if (pkhash && model->wallet().getPubKey(out.txout.scriptPubKey, ToKeyID(*pkhash), pubkey))
             {
                 nBytesInputs += (pubkey.IsCompressed() ? 148 : 180);

src/qt/signverifymessagedialog.cpp

@@ -120,7 +120,7 @@ void SignVerifyMessageDialog::on_signMessageButton_SM_clicked()
         ui->statusLabel_SM->setText(tr("The entered address is invalid.") + QString(" ") + tr("Please check the address and try again."));
         return;
     }
-    const PKHash* pkhash = boost::get<PKHash>(&destination);
+    const PKHash* pkhash = std::get_if<PKHash>(&destination);
     if (!pkhash) {
         ui->addressIn_SM->setValid(false);
         ui->statusLabel_SM->setStyleSheet("QLabel { color: red; }");

src/qt/transactionrecord.cpp

@@ -123,7 +123,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const interface
                     continue;
                 }
 
-                if (!boost::get<CNoDestination>(&wtx.txout_address[nOut]))
+                if (!std::get_if<CNoDestination>(&wtx.txout_address[nOut]))
                 {
                     // Sent to Bitcoin Address
                     sub.type = TransactionRecord::SendToAddress;