couple new features for string wrapper

openVulkanoCpp/Data/Containers/String.hpp

@@ -7,6 +7,11 @@
 #pragma once
 
 #include <string>
+#include <c4/substr.hpp>
+#include <c4/substr_fwd.hpp>
+#include <c4/format.hpp>
+#include <c4/charconv.hpp>
+#include <type_traits>
 
 namespace OpenVulkano
 {
@@ -43,7 +48,9 @@ namespace OpenVulkano
 		template<typename T> bool operator!=(const T& other) const { return m_string != other; }
 
 		operator std::string() const { return m_string; }
-		const char* CStr() const { return m_string.c_str(); }
+		explicit operator std::string_view() const { return m_string; }
+
+		const char* CharString() const { return m_string.c_str(); }
 		const char* Data() { return m_string.data(); }
 		size_t Length() const { return m_string.length(); }
 		size_t Size() const { return m_string.size(); }
@@ -52,6 +59,8 @@ namespace OpenVulkano
 		char& Back() { return m_string.back(); }
 		void PopBack() { m_string.pop_back(); }
 		void Clear() { m_string.clear(); }
+		void Shrink() { m_string.shrink_to_fit(); }
+		String Substring(size_t start, size_t end) const { return m_string.substr(start, end); }
 
 		size_t FindStartIndexOf(const String& str) const { return m_string.find(str); }
 
@@ -63,6 +72,48 @@ namespace OpenVulkano
 			return *this;
 		}
 
+		void ToUpper() noexcept
+		{
+			for (char& c: m_string)
+			{
+				if (c >= 'a' && c <= 'z')
+				{
+					c -= 32;
+				}
+			}
+		}
+
+		void ToLower() noexcept
+		{
+			for (char& c: m_string)
+			{
+				if (c >= 'A' && c <= 'Z')
+				{
+					c += 32;
+				}
+			}
+		}
+
+		// Makes "i am a string" to "I Am A String" also need a better name for the function
+		void ToUpperStarters()
+		{
+			for (size_t i = 0; i < m_string.size(); ++i)
+			{
+				if (m_string[i] == ' ')
+				{
+					m_string[i + 1] -= 32;
+				}
+			}
+		}
+
+		template<typename T, typename = std::enable_if_t<std::is_arithmetic_v<T>>> T FromString() const
+		{
+			T value;
+			c4::csubstr str = c4::to_csubstr(m_string.c_str());
+			c4::from_chars(str, &value);
+			return value;
+		}
+
 	private:
 		std::string m_string;
 	};