[Commands] Nested Command Aliases (#2636)

common/strings.cpp

@@ -200,6 +200,16 @@ bool Strings::IsNumber(const std::string &s)
 	}
 }
 
+bool Strings::IsFloat(const std::string &s)
+{
+	try {
+		auto r = stof(s);
+		return true;
+	}
+	catch (std::exception &) {
+		return false;
+	}
+}
 
 std::string Strings::Join(const std::vector<std::string> &ar, const std::string &delim)
 {

common/strings.h

@@ -86,6 +86,7 @@ public:
 	static bool Contains(std::vector<std::string> container, std::string element);
 	static bool Contains(const std::string& subject, const std::string& search);
 	static bool IsNumber(const std::string &s);
+	static bool IsFloat(const std::string &s);
 	static const std::string ToLower(std::string s);
 	static const std::string ToUpper(std::string s);
 	static const std::string UcFirst(std::string s);