Refactored error handling

Now uses base error class which has an abstract function for overiding how it is displayed to the console.

common/Console.h

@@ -0,0 +1,60 @@
+#pragma once
+
+#define NOMINMAX
+#include <Windows.h>
+
+#include <iostream>
+#include <string>
+
+namespace LX
+{
+	enum class Color
+	{
+		BLACK = 0,
+		BLUE = 1,
+		GREEN = 2,
+		AQUA = 3,
+		RED = 4,
+		PURPLE = 5,
+		YELLOW = 6,
+		LIGHT_GRAY = 7,
+		LIGHT_BLUE = 9,
+		LIGHT_GREEN = 10,
+		LIGHT_AQUA = 11,
+		LIGHT_RED = 12,
+		LIGHT_PURPLE = 13,
+		LIGHT_YELLOW = 14,
+		WHITE = 15
+	};
+
+	inline void PrintStringAsColor(const std::string& str, Color c)
+	{
+		// Gets a handle to the console //
+		static HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
+
+		// Sets the color of the console to the desired color //
+		SetConsoleTextAttribute(hConsole, (WORD)c);
+
+		// Outputs the text //
+		std::cout << str;
+
+		// Resets the color //
+		SetConsoleTextAttribute(hConsole, (WORD)Color::LIGHT_GRAY);
+	}
+
+	// Util function for getting a line of the source at a given index (used for errors) //
+	inline std::string GetLineAtIndexOf(const std::string src, const std::streamsize index)
+	{
+		// Finds the start of the line //
+		size_t start = src.rfind('\n', index);
+		if (start == std::string::npos) { start = 0; } // None means first line
+		else { start = start + 1; } // Skips new line char
+
+		// Finds the end of the line //
+		size_t end = src.find('\n', index);
+		if (end == std::string::npos) { end = src.size(); } // None means last line
+
+		// Returns the string between start and end //
+		return src.substr(start, end - start);
+	}
+}