Added token class

Also added a couple of foward declarations for faster compiles

common/Parser.h

@@ -1,21 +1,76 @@
 #pragma once
 
+// Lexer foward declares fstream components so we can use them here //
 #include <Lexer.h>
-#include <LLVM.h>
 
-#include <fstream>
-#include <vector>
 #include <memory>
 
+// Foward declares all items of the llvm lib that we need //
+// Done to avoid including LLVM.h to shorten compile times //
+namespace llvm
+{
+	class Value;
+	class LLVMContext;
+	class Module;
+
+	class ConstantFolder;
+	class IRBuilderDefaultInserter;
+
+	template<typename T1 = ConstantFolder, typename T2 = IRBuilderDefaultInserter>
+	class IRBuilder;
+}
+
+// The nodes of the abstract syntax tree constructed by the parser from the tokens //
+namespace LX::AST
+{
+	// Base node that everything else inherits from
+	class Node
+	{
+		public:
+			// Enum for storing the type of node //
+			// Used so a pointer to Node can be used and then turned into it's true type //
+			enum NodeType
+			{
+				// General Nodes //
+
+				IDENTIFIER,
+
+				// Control flow Nodes //
+
+				// If an error happened somewhere //
+				UNDEFINED = -1
+			};
+
+			// Constructor to set the node type //
+			Node(NodeType type)
+				: m_Type(type)
+			{}
+
+			// Virtual destructor because of polymorphism //
+			virtual ~Node() = default;
+
+			// Function for generating LLVN IR (Intermediate representation) //
+			virtual llvm::Value* GenIR(llvm::LLVMContext& context, llvm::Module& module, llvm::IRBuilder<>& builder) = 0;
+
+			// Function for generating C/C++ code (Currently not implemented) //
+			virtual void GenC() = 0;
+
+			// The type of the node //
+			const NodeType m_Type;
+	};
+}
+
 namespace LX
 {
-	struct GlobalDeclaration
-	{
-	};
-
 	struct FunctionDeclaration
 	{
+		std::vector<std::unique_ptr<AST::Node>> body;
 	};
 
-	std::vector<std::unique_ptr<GlobalDeclaration>> TurnTokensIntoAbstractSyntaxTree(std::vector<Token>& tokens, std::ofstream* log);
+	struct FileAST
+	{
+		std::vector<FunctionDeclaration> functions;
+	};
+
+	FileAST TurnTokensIntoAbstractSyntaxTree(std::vector<Token>& tokens, std::ofstream* log);
 }