remove GetBoolArg() fDefault parameter defaulting to false

- explicitly set the default of all GetBoolArg() calls
- rework getarg_test.cpp and util_tests.cpp to cover this change
- some indentation fixes
- move macdockiconhandler.h include in bitcoin.cpp to the "our headers"
  section

10 files changed, 61 insertions, 76 deletions

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index a1d76e1812..c99b74f183 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -757,7 +757,7 @@ void StartRPCThreads()
     rpc_io_service = new asio::io_service();
     rpc_ssl_context = new ssl::context(*rpc_io_service, ssl::context::sslv23);
 
-    const bool fUseSSL = GetBoolArg("-rpcssl");
+    const bool fUseSSL = GetBoolArg("-rpcssl", false);
 
     if (fUseSSL)
     {
@@ -1037,7 +1037,7 @@ json_spirit::Value CRPCTable::execute(const std::string &strMethod, const json_s
 
     // Observe safe mode
     string strWarning = GetWarnings("rpc");
-    if (strWarning != "" && !GetBoolArg("-disablesafemode") &&
+    if (strWarning != "" && !GetBoolArg("-disablesafemode", false) &&
         !pcmd->okSafeMode)
         throw JSONRPCError(RPC_FORBIDDEN_BY_SAFE_MODE, string("Safe mode: ") + strWarning);
 
@@ -1071,7 +1071,7 @@ Object CallRPC(const string& strMethod, const Array& params)
                 GetConfigFile().string().c_str()));
 
     // Connect to localhost
-    bool fUseSSL = GetBoolArg("-rpcssl");
+    bool fUseSSL = GetBoolArg("-rpcssl", false);
     asio::io_service io_service;
     ssl::context context(io_service, ssl::context::sslv23);
     context.set_options(ssl::context::no_sslv2);
diff --git a/src/init.cpp b/src/init.cpp
index 226e93e9a5..78f838f7cb 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -198,7 +198,7 @@ bool AppInit(int argc, char* argv[])
             exit(ret);
         }
 #if !defined(WIN32)
-        fDaemon = GetBoolArg("-daemon");
+        fDaemon = GetBoolArg("-daemon", false);
         if (fDaemon)
         {
             // Daemonize
@@ -495,7 +495,7 @@ bool AppInit2(boost::thread_group& threadGroup)
 
     // ********************************************************* Step 2: parameter interactions
 
-    fTestNet = GetBoolArg("-testnet");
+    fTestNet = GetBoolArg("-testnet", false);
     Checkpoints::fEnabled = GetBoolArg("-checkpoints", true);
 
     if (mapArgs.count("-bind")) {
@@ -526,7 +526,7 @@ bool AppInit2(boost::thread_group& threadGroup)
         SoftSetBoolArg("-discover", false);
     }
 
-    if (GetBoolArg("-salvagewallet")) {
+    if (GetBoolArg("-salvagewallet", false)) {
         // Rewrite just private keys: rescan to find transactions
         SoftSetBoolArg("-rescan", true);
     }
@@ -543,8 +543,8 @@ bool AppInit2(boost::thread_group& threadGroup)
 
     // ********************************************************* Step 3: parameter-to-internal-flags
 
-    fDebug = GetBoolArg("-debug");
-    fBenchmark = GetBoolArg("-benchmark");
+    fDebug = GetBoolArg("-debug", false);
+    fBenchmark = GetBoolArg("-benchmark", false);
 
     // -par=0 means autodetect, but nScriptCheckThreads==0 means no concurrency
     nScriptCheckThreads = GetArg("-par", 0);
@@ -559,20 +559,20 @@ bool AppInit2(boost::thread_group& threadGroup)
     if (fDebug)
         fDebugNet = true;
     else
-        fDebugNet = GetBoolArg("-debugnet");
+        fDebugNet = GetBoolArg("-debugnet", false);
 
     if (fDaemon)
         fServer = true;
     else
-        fServer = GetBoolArg("-server");
+        fServer = GetBoolArg("-server", false);
 
     /* force fServer when running without GUI */
 #if !defined(QT_GUI)
     fServer = true;
 #endif
-    fPrintToConsole = GetBoolArg("-printtoconsole");
-    fPrintToDebugger = GetBoolArg("-printtodebugger");
-    fLogTimestamps = GetBoolArg("-logtimestamps");
+    fPrintToConsole = GetBoolArg("-printtoconsole", false);
+    fPrintToDebugger = GetBoolArg("-printtodebugger", false);
+    fLogTimestamps = GetBoolArg("-logtimestamps", false);
 
     if (mapArgs.count("-timeout"))
     {
@@ -677,7 +677,7 @@ bool AppInit2(boost::thread_group& threadGroup)
         }
     }
 
-    if (GetBoolArg("-salvagewallet"))
+    if (GetBoolArg("-salvagewallet", false))
     {
         // Recover readable keypairs:
         if (!CWalletDB::Recover(bitdb, "wallet.dat", true))
@@ -799,7 +799,7 @@ bool AppInit2(boost::thread_group& threadGroup)
 
     // ********************************************************* Step 7: load block chain
 
-    fReindex = GetBoolArg("-reindex");
+    fReindex = GetBoolArg("-reindex", false);
 
     // Upgrading to 0.8; hard-link the old blknnnn.dat files into /blocks/
     filesystem::path blocksDir = GetDataDir() / "blocks";
@@ -922,7 +922,7 @@ bool AppInit2(boost::thread_group& threadGroup)
     }
     printf(" block index %15"PRI64d"ms\n", GetTimeMillis() - nStart);
 
-    if (GetBoolArg("-printblockindex") || GetBoolArg("-printblocktree"))
+    if (GetBoolArg("-printblockindex", false) || GetBoolArg("-printblocktree", false))
     {
         PrintBlockTree();
         return false;
@@ -1018,7 +1018,7 @@ bool AppInit2(boost::thread_group& threadGroup)
     RegisterWallet(pwalletMain);
 
     CBlockIndex *pindexRescan = pindexBest;
-    if (GetBoolArg("-rescan"))
+    if (GetBoolArg("-rescan", false))
         pindexRescan = pindexGenesisBlock;
     else
     {
diff --git a/src/main.cpp b/src/main.cpp
index 24e1c23349..a98b83b6af 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2931,7 +2931,7 @@ string GetWarnings(string strFor)
     string strStatusBar;
     string strRPC;
 
-    if (GetBoolArg("-testsafemode"))
+    if (GetBoolArg("-testsafemode", false))
         strRPC = "test";
 
     if (!CLIENT_VERSION_IS_RELEASE)
@@ -4175,7 +4175,7 @@ CBlockTemplate* CreateNewBlock(CReserveKey& reservekey)
         // Priority order to process transactions
         list<COrphan> vOrphan; // list memory doesn't move
         map<uint256, vector<COrphan*> > mapDependers;
-        bool fPrintPriority = GetBoolArg("-printpriority");
+        bool fPrintPriority = GetBoolArg("-printpriority", false);
 
         // This vector will be sorted into a priority queue:
         vector<TxPriority> vecPriority;
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index f525d1bb38..fbf57fffd2 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -15,6 +15,9 @@
 #include "ui_interface.h"
 #include "paymentserver.h"
 #include "splashscreen.h"
+#ifdef Q_OS_MAC
+#include "macdockiconhandler.h"
+#endif
 
 #include <QMessageBox>
 #include <QTextCodec>
@@ -23,10 +26,6 @@
 #include <QTranslator>
 #include <QLibraryInfo>
 
-#ifdef Q_OS_MAC
-#include "macdockiconhandler.h"
-#endif
-
 #if defined(BITCOIN_NEED_QT_PLUGINS) && !defined(_BITCOIN_QT_PLUGINS_INCLUDED)
 #define _BITCOIN_QT_PLUGINS_INCLUDED
 #define __INSURE__
@@ -152,7 +151,7 @@ int main(int argc, char *argv[])
     // as it is used to locate QSettings)
     QApplication::setOrganizationName("Bitcoin");
     QApplication::setOrganizationDomain("bitcoin.org");
-    if(GetBoolArg("-testnet")) // Separate UI settings for testnet
+    if (GetBoolArg("-testnet", false)) // Separate UI settings for testnet
         QApplication::setApplicationName("Bitcoin-Qt-testnet");
     else
         QApplication::setApplicationName("Bitcoin-Qt");
@@ -204,13 +203,14 @@ int main(int argc, char *argv[])
 
 #ifdef Q_OS_MAC
     // on mac, also change the icon now because it would look strange to have a testnet splash (green) and a std app icon (orange)
-    if(GetBoolArg("-testnet")) {
+    if(GetBoolArg("-testnet", false))
+    {
         MacDockIconHandler::instance()->setIcon(QIcon(":icons/bitcoin_testnet"));
     }
 #endif
 
     SplashScreen splash(QPixmap(), 0);
-    if (GetBoolArg("-splash", true) && !GetBoolArg("-min"))
+    if (GetBoolArg("-splash", true) && !GetBoolArg("-min", false))
     {
         splash.show();
         splash.setAutoFillBackground(true);
@@ -254,7 +254,7 @@ int main(int argc, char *argv[])
                 window.setCurrentWallet("~Default");
 
                 // If -min option passed, start window minimized.
-                if(GetBoolArg("-min"))
+                if(GetBoolArg("-min", false))
                 {
                     window.showMinimized();
                 }
diff --git a/src/qt/splashscreen.cpp b/src/qt/splashscreen.cpp
index f8d16699ca..d60b2ef4ba 100644
--- a/src/qt/splashscreen.cpp
+++ b/src/qt/splashscreen.cpp
@@ -26,7 +26,7 @@ SplashScreen::SplashScreen(const QPixmap &pixmap, Qt::WindowFlags f) :
 
     // load the bitmap for writing some text over it
     QPixmap newPixmap;
-    if(GetBoolArg("-testnet")) {
+    if(GetBoolArg("-testnet", false)) {
         newPixmap     = QPixmap(":/images/splash_testnet");
     }
     else {
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index 845e7f1f9c..d2cac68706 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -33,7 +33,7 @@ Value getgenerate(const Array& params, bool fHelp)
             "getgenerate\n"
             "Returns true or false.");
 
-    return GetBoolArg("-gen");
+    return GetBoolArg("-gen", false);
 }
 
 
@@ -84,16 +84,16 @@ Value getmininginfo(const Array& params, bool fHelp)
             "Returns an object containing mining-related information.");
 
     Object obj;
-    obj.push_back(Pair("blocks",        (int)nBestHeight));
-    obj.push_back(Pair("currentblocksize",(uint64_t)nLastBlockSize));
-    obj.push_back(Pair("currentblocktx",(uint64_t)nLastBlockTx));
-    obj.push_back(Pair("difficulty",    (double)GetDifficulty()));
-    obj.push_back(Pair("errors",        GetWarnings("statusbar")));
-    obj.push_back(Pair("generate",      GetBoolArg("-gen")));
-    obj.push_back(Pair("genproclimit",  (int)GetArg("-genproclimit", -1)));
-    obj.push_back(Pair("hashespersec",  gethashespersec(params, false)));
-    obj.push_back(Pair("pooledtx",      (uint64_t)mempool.size()));
-    obj.push_back(Pair("testnet",       fTestNet));
+    obj.push_back(Pair("blocks",           (int)nBestHeight));
+    obj.push_back(Pair("currentblocksize", (uint64_t)nLastBlockSize));
+    obj.push_back(Pair("currentblocktx",   (uint64_t)nLastBlockTx));
+    obj.push_back(Pair("difficulty",       (double)GetDifficulty()));
+    obj.push_back(Pair("errors",           GetWarnings("statusbar")));
+    obj.push_back(Pair("generate",         GetBoolArg("-gen", false)));
+    obj.push_back(Pair("genproclimit",     (int)GetArg("-genproclimit", -1)));
+    obj.push_back(Pair("hashespersec",     gethashespersec(params, false)));
+    obj.push_back(Pair("pooledtx",         (uint64_t)mempool.size()));
+    obj.push_back(Pair("testnet",          fTestNet));
     return obj;
 }
 
diff --git a/src/test/getarg_tests.cpp b/src/test/getarg_tests.cpp
index 78953d296f..c89d218f80 100644
--- a/src/test/getarg_tests.cpp
+++ b/src/test/getarg_tests.cpp
@@ -6,8 +6,7 @@
 
 BOOST_AUTO_TEST_SUITE(getarg_tests)
 
-static void
-ResetArgs(const std::string& strArg)
+static void ResetArgs(const std::string& strArg)
 {
     std::vector<std::string> vecArg;
     boost::split(vecArg, strArg, boost::is_space(), boost::token_compress_on);
@@ -26,62 +25,50 @@ ResetArgs(const std::string& strArg)
 BOOST_AUTO_TEST_CASE(boolarg)
 {
     ResetArgs("-foo");
-    BOOST_CHECK(GetBoolArg("-foo"));
     BOOST_CHECK(GetBoolArg("-foo", false));
     BOOST_CHECK(GetBoolArg("-foo", true));
 
-    BOOST_CHECK(!GetBoolArg("-fo"));
     BOOST_CHECK(!GetBoolArg("-fo", false));
     BOOST_CHECK(GetBoolArg("-fo", true));
 
-    BOOST_CHECK(!GetBoolArg("-fooo"));
     BOOST_CHECK(!GetBoolArg("-fooo", false));
     BOOST_CHECK(GetBoolArg("-fooo", true));
 
     ResetArgs("-foo=0");
-    BOOST_CHECK(!GetBoolArg("-foo"));
     BOOST_CHECK(!GetBoolArg("-foo", false));
     BOOST_CHECK(!GetBoolArg("-foo", true));
 
     ResetArgs("-foo=1");
-    BOOST_CHECK(GetBoolArg("-foo"));
     BOOST_CHECK(GetBoolArg("-foo", false));
     BOOST_CHECK(GetBoolArg("-foo", true));
 
     // New 0.6 feature: auto-map -nosomething to !-something:
     ResetArgs("-nofoo");
-    BOOST_CHECK(!GetBoolArg("-foo"));
     BOOST_CHECK(!GetBoolArg("-foo", false));
     BOOST_CHECK(!GetBoolArg("-foo", true));
 
     ResetArgs("-nofoo=1");
-    BOOST_CHECK(!GetBoolArg("-foo"));
     BOOST_CHECK(!GetBoolArg("-foo", false));
     BOOST_CHECK(!GetBoolArg("-foo", true));
 
     ResetArgs("-foo -nofoo");  // -foo should win
-    BOOST_CHECK(GetBoolArg("-foo"));
     BOOST_CHECK(GetBoolArg("-foo", false));
     BOOST_CHECK(GetBoolArg("-foo", true));
 
     ResetArgs("-foo=1 -nofoo=1");  // -foo should win
-    BOOST_CHECK(GetBoolArg("-foo"));
     BOOST_CHECK(GetBoolArg("-foo", false));
     BOOST_CHECK(GetBoolArg("-foo", true));
 
     ResetArgs("-foo=0 -nofoo=0");  // -foo should win
-    BOOST_CHECK(!GetBoolArg("-foo"));
     BOOST_CHECK(!GetBoolArg("-foo", false));
     BOOST_CHECK(!GetBoolArg("-foo", true));
 
     // New 0.6 feature: treat -- same as -:
     ResetArgs("--foo=1");
-    BOOST_CHECK(GetBoolArg("-foo"));
     BOOST_CHECK(GetBoolArg("-foo", false));
     BOOST_CHECK(GetBoolArg("-foo", true));
 
     ResetArgs("--nofoo=1");
-    BOOST_CHECK(!GetBoolArg("-foo"));
     BOOST_CHECK(!GetBoolArg("-foo", false));
     BOOST_CHECK(!GetBoolArg("-foo", true));
 
@@ -133,7 +120,7 @@ BOOST_AUTO_TEST_CASE(intarg)
 BOOST_AUTO_TEST_CASE(doubledash)
 {
     ResetArgs("--foo");
-    BOOST_CHECK_EQUAL(GetBoolArg("-foo"), true);
+    BOOST_CHECK_EQUAL(GetBoolArg("-foo", false), true);
 
     ResetArgs("--foo=verbose --bar=1");
     BOOST_CHECK_EQUAL(GetArg("-foo", ""), "verbose");
@@ -143,25 +130,24 @@ BOOST_AUTO_TEST_CASE(doubledash)
 BOOST_AUTO_TEST_CASE(boolargno)
 {
     ResetArgs("-nofoo");
-    BOOST_CHECK(!GetBoolArg("-foo"));
     BOOST_CHECK(!GetBoolArg("-foo", true));
     BOOST_CHECK(!GetBoolArg("-foo", false));
 
     ResetArgs("-nofoo=1");
-    BOOST_CHECK(!GetBoolArg("-foo"));
     BOOST_CHECK(!GetBoolArg("-foo", true));
     BOOST_CHECK(!GetBoolArg("-foo", false));
 
     ResetArgs("-nofoo=0");
-    BOOST_CHECK(GetBoolArg("-foo"));
     BOOST_CHECK(GetBoolArg("-foo", true));
     BOOST_CHECK(GetBoolArg("-foo", false));
 
     ResetArgs("-foo --nofoo");
-    BOOST_CHECK(GetBoolArg("-foo"));
+    BOOST_CHECK(GetBoolArg("-foo", true));
+    BOOST_CHECK(GetBoolArg("-foo", false));
 
     ResetArgs("-nofoo -foo"); // foo always wins:
-    BOOST_CHECK(GetBoolArg("-foo"));
+    BOOST_CHECK(GetBoolArg("-foo", true));
+    BOOST_CHECK(GetBoolArg("-foo", false));
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
index 1b0ccad511..64bd3a1b28 100644
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -31,7 +31,7 @@ BOOST_AUTO_TEST_CASE(util_criticalsection)
 }
 
 BOOST_AUTO_TEST_CASE(util_MedianFilter)
-{    
+{
     CMedianFilter<int> filter(5, 15);
 
     BOOST_CHECK_EQUAL(filter.median(), 15);
@@ -56,10 +56,10 @@ BOOST_AUTO_TEST_CASE(util_MedianFilter)
 }
 
 static const unsigned char ParseHex_expected[65] = {
-    0x04, 0x67, 0x8a, 0xfd, 0xb0, 0xfe, 0x55, 0x48, 0x27, 0x19, 0x67, 0xf1, 0xa6, 0x71, 0x30, 0xb7, 
-    0x10, 0x5c, 0xd6, 0xa8, 0x28, 0xe0, 0x39, 0x09, 0xa6, 0x79, 0x62, 0xe0, 0xea, 0x1f, 0x61, 0xde, 
-    0xb6, 0x49, 0xf6, 0xbc, 0x3f, 0x4c, 0xef, 0x38, 0xc4, 0xf3, 0x55, 0x04, 0xe5, 0x1e, 0xc1, 0x12, 
-    0xde, 0x5c, 0x38, 0x4d, 0xf7, 0xba, 0x0b, 0x8d, 0x57, 0x8a, 0x4c, 0x70, 0x2b, 0x6b, 0xf1, 0x1d, 
+    0x04, 0x67, 0x8a, 0xfd, 0xb0, 0xfe, 0x55, 0x48, 0x27, 0x19, 0x67, 0xf1, 0xa6, 0x71, 0x30, 0xb7,
+    0x10, 0x5c, 0xd6, 0xa8, 0x28, 0xe0, 0x39, 0x09, 0xa6, 0x79, 0x62, 0xe0, 0xea, 0x1f, 0x61, 0xde,
+    0xb6, 0x49, 0xf6, 0xbc, 0x3f, 0x4c, 0xef, 0x38, 0xc4, 0xf3, 0x55, 0x04, 0xe5, 0x1e, 0xc1, 0x12,
+    0xde, 0x5c, 0x38, 0x4d, 0xf7, 0xba, 0x0b, 0x8d, 0x57, 0x8a, 0x4c, 0x70, 0x2b, 0x6b, 0xf1, 0x1d,
     0x5f
 };
 BOOST_AUTO_TEST_CASE(util_ParseHex)
@@ -123,13 +123,13 @@ BOOST_AUTO_TEST_CASE(util_ParseParameters)
     BOOST_CHECK(mapArgs.empty() && mapMultiArgs.empty());
 
     ParseParameters(5, (char**)argv_test);
-    // expectation: -ignored is ignored (program name argument), 
+    // expectation: -ignored is ignored (program name argument),
     // -a, -b and -ccc end up in map, -d ignored because it is after
     // a non-option argument (non-GNU option parsing)
     BOOST_CHECK(mapArgs.size() == 3 && mapMultiArgs.size() == 3);
-    BOOST_CHECK(mapArgs.count("-a") && mapArgs.count("-b") && mapArgs.count("-ccc") 
+    BOOST_CHECK(mapArgs.count("-a") && mapArgs.count("-b") && mapArgs.count("-ccc")
                 && !mapArgs.count("f") && !mapArgs.count("-d"));
-    BOOST_CHECK(mapMultiArgs.count("-a") && mapMultiArgs.count("-b") && mapMultiArgs.count("-ccc") 
+    BOOST_CHECK(mapMultiArgs.count("-a") && mapMultiArgs.count("-b") && mapMultiArgs.count("-ccc")
                 && !mapMultiArgs.count("f") && !mapMultiArgs.count("-d"));
 
     BOOST_CHECK(mapArgs["-a"] == "" && mapArgs["-ccc"] == "multiple");
@@ -154,10 +154,10 @@ BOOST_AUTO_TEST_CASE(util_GetArg)
     BOOST_CHECK_EQUAL(GetArg("inttest1", -1), 12345);
     BOOST_CHECK_EQUAL(GetArg("inttest2", -1), 81985529216486895LL);
     BOOST_CHECK_EQUAL(GetArg("inttest3", -1), -1);
-    BOOST_CHECK_EQUAL(GetBoolArg("booltest1"), true);
-    BOOST_CHECK_EQUAL(GetBoolArg("booltest2"), false);
-    BOOST_CHECK_EQUAL(GetBoolArg("booltest3"), false);
-    BOOST_CHECK_EQUAL(GetBoolArg("booltest4"), true);
+    BOOST_CHECK_EQUAL(GetBoolArg("booltest1", false), true);
+    BOOST_CHECK_EQUAL(GetBoolArg("booltest2", false), false);
+    BOOST_CHECK_EQUAL(GetBoolArg("booltest3", false), false);
+    BOOST_CHECK_EQUAL(GetBoolArg("booltest4", false), true);
 }
 
 BOOST_AUTO_TEST_CASE(util_WildcardMatch)
diff --git a/src/util.cpp b/src/util.cpp
index 4c9b897f57..0bd2960233 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -518,7 +518,7 @@ static void InterpretNegativeSetting(string name, map<string, string>& mapSettin
         positive.append(name.begin()+3, name.end());
         if (mapSettingsRet.count(positive) == 0)
         {
-            bool value = !GetBoolArg(name);
+            bool value = !GetBoolArg(name, false);
             mapSettingsRet[positive] = (value ? "1" : "0");
         }
     }
@@ -1171,7 +1171,6 @@ bool TruncateFile(FILE *file, unsigned int length) {
 #endif
 }
 
-
 // this function tries to raise the file descriptor limit to the requested number.
 // It returns the actual file descriptor limit (which may be more or less than nMinFD)
 int RaiseFileDescriptorLimit(int nMinFD) {
@@ -1257,8 +1256,8 @@ void ShrinkDebugFile()
             fclose(file);
         }
     }
-    else if(file != NULL)
-	     fclose(file);
+    else if (file != NULL)
+        fclose(file);
 }
 
 
diff --git a/src/util.h b/src/util.h
index d9ad74f6c7..941e0d99ac 100644
--- a/src/util.h
+++ b/src/util.h
@@ -390,7 +390,7 @@ int64 GetArg(const std::string& strArg, int64 nDefault);
  * @param default (true or false)
  * @return command-line argument or default value
  */
-bool GetBoolArg(const std::string& strArg, bool fDefault=false);
+bool GetBoolArg(const std::string& strArg, bool fDefault);
 
 /**
  * Set an argument if it doesn't already have a value