Replace convertTo/stringify with non-throwing alternatives.

Having these throw is terrible for ergonomics and there are loads
of places where the exception was either silently ignored or not
handled at all. Having a function which returns an optional and
another that returns a default works a lot better imo.

4 files changed, 13 insertions, 15 deletions

diff --git a/modules/nickserv/nickserv.cpp b/modules/nickserv/nickserv.cpp
index 541b7f0f9..f1f087163 100644
--- a/modules/nickserv/nickserv.cpp
+++ b/modules/nickserv/nickserv.cpp
@@ -246,7 +246,7 @@ public:
 			int i = 0;
 			do
 			{
-				guestnick = guestprefix + stringify(static_cast<uint16_t>(Anope::RandomNumber()));
+				guestnick = guestprefix + Anope::ToString(static_cast<uint16_t>(Anope::RandomNumber()));
 				if (guestnick.length() > nicklen)
 					guestnick = guestnick.substr(0, nicklen);
 			}
diff --git a/modules/nickserv/ns_ajoin.cpp b/modules/nickserv/ns_ajoin.cpp
index f6e716a36..91e700e4a 100644
--- a/modules/nickserv/ns_ajoin.cpp
+++ b/modules/nickserv/ns_ajoin.cpp
@@ -105,7 +105,7 @@ class CommandNSAJoin final
 			{
 				AJoinEntry *aj = (*channels)->at(i);
 				ListFormatter::ListEntry entry;
-				entry["Number"] = stringify(i + 1);
+				entry["Number"] = Anope::ToString(i + 1);
 				entry["Channel"] = aj->channel;
 				entry["Key"] = aj->key;
 				list.AddEntry(entry);
@@ -382,13 +382,11 @@ public:
 					Anope::string l;
 					if (c->GetParam("LIMIT", l))
 					{
-						try
+						if (auto limit = Anope::TryConvert<unsigned>(l))
 						{
-							unsigned limit = convertTo<unsigned>(l);
-							if (c->users.size() >= limit)
+							if (c->users.size() >= limit.value())
 								need_invite = true;
 						}
-						catch (const ConvertException &) { }
 					}
 				}
 			}
diff --git a/modules/nickserv/ns_alist.cpp b/modules/nickserv/ns_alist.cpp
index e4adfb870..0d02894af 100644
--- a/modules/nickserv/ns_alist.cpp
+++ b/modules/nickserv/ns_alist.cpp
@@ -59,7 +59,7 @@ public:
 			if (ci->GetFounder() == nc)
 			{
 				++chan_count;
-				entry["Number"] = stringify(chan_count);
+				entry["Number"] = Anope::ToString(chan_count);
 				entry["Channel"] = (ci->HasExt("CS_NO_EXPIRE") ? "!" : "") + ci->name;
 				entry["Access"] = Language::Translate(source.GetAccount(), _("Founder"));
 				entry["Description"] = ci->desc;
@@ -70,7 +70,7 @@ public:
 			if (ci->GetSuccessor() == nc)
 			{
 				++chan_count;
-				entry["Number"] = stringify(chan_count);
+				entry["Number"] = Anope::ToString(chan_count);
 				entry["Channel"] = (ci->HasExt("CS_NO_EXPIRE") ? "!" : "") + ci->name;
 				entry["Access"] = Language::Translate(source.GetAccount(), _("Successor"));
 				entry["Description"] = ci->desc;
@@ -84,7 +84,7 @@ public:
 
 			++chan_count;
 
-			entry["Number"] = stringify(chan_count);
+			entry["Number"] = Anope::ToString(chan_count);
 			entry["Channel"] = (ci->HasExt("CS_NO_EXPIRE") ? "!" : "") + ci->name;
 			for (auto &p : access.paths)
 			{
diff --git a/modules/nickserv/ns_list.cpp b/modules/nickserv/ns_list.cpp
index a1c28a28d..1bd4ea043 100644
--- a/modules/nickserv/ns_list.cpp
+++ b/modules/nickserv/ns_list.cpp
@@ -39,17 +39,17 @@ public:
 			Anope::string n1, n2;
 			sepstream(pattern.substr(1), '-').GetToken(n1, 0);
 			sepstream(pattern, '-').GetToken(n2, 1);
-			try
-			{
-				from = convertTo<int>(n1);
-				to = convertTo<int>(n2);
-			}
-			catch (const ConvertException &)
+
+			auto num1 = Anope::TryConvert<int>(n1);
+			auto num2 = Anope::TryConvert<int>(n2);
+			if (!num1.has_value() || !num2.has_value())
 			{
 				source.Reply(LIST_INCORRECT_RANGE);
 				return;
 			}
 
+			from = num1.value();
+			to = num2.value();
 			pattern = "*";
 		}