Added ParseFunctionCall

parser/src/Parser.cpp

@@ -10,6 +10,13 @@ namespace LXC::Internal
     {
         return Util::ReturnVal<AST::NodePtr, Parser::ParserError>(std::make_unique<NodeType>(std::forward<Args>(args)...));
     }
+
+    template<typename NodeType, typename... Args>
+        requires std::is_base_of_v<AST::NodeValue, NodeType> && std::is_constructible_v<NodeType, Args...>
+    static const inline Util::ReturnVal<AST::NodeValuePtr, Parser::ParserError> CreateNodeV(Args&&... args)
+    {
+        return Util::ReturnVal<AST::NodeValuePtr, Parser::ParserError>(std::make_unique<NodeType>(std::forward<Args>(args)...));
+    }
 }
 
 namespace LXC::Parser
@@ -73,7 +80,7 @@ namespace LXC::Parser
             const size_t length;
     };
 
-    static Util::ReturnVal<AST::NodePtr, ParserError> ParsePrimary(ParserContext& ctx)
+    static Util::ReturnVal<AST::NodeValuePtr, ParserError> ParsePrimary(ParserContext& ctx)
     {
         // Gets the current token and returns if out of bounds //
         const Lexer::Token* current = ctx.At();
@@ -85,10 +92,12 @@ namespace LXC::Parser
         {
             // Fowards to the ParseIdentifier and returns the result/error //
             case Lexer::Token::Identifier:
+                ctx.Advance();
                 return Internal::CreateNode<AST::VarAccess>(current->Str());
 
             // Returns an integer literal node //
             case Lexer::Token::NumLiteral:
+                ctx.Advance();
                 return Internal::CreateNode<AST::IntLiteral>(current->Str());
 
             default:
@@ -97,6 +106,38 @@ namespace LXC::Parser
         }
     }
 
+    static Util::ReturnVal<AST::NodeValuePtr, ParserError> ParseFunctionCall(ParserContext& ctx)
+    {
+        // Checks if the upcoming pattern matches a function signature: [Identifier(function name), OpenBracket(Start of params)] //
+        if (!ctx.Expect(std::array{ Lexer::Token::Identifier, Lexer::Token::OpenParen }))
+        {
+            // Captures the function name and advances over it and the start paren //
+            const Lexer::Token* functionNameToken = ctx.At();
+            ctx.Advance(2);
+
+            // Captures the arguments of the function call //
+            AST::ValueList arguments;
+            const Lexer::Token* current = ctx.At();
+            while (current != nullptr)
+            {
+                // End of the function call //
+                if (current->type == Lexer::Token::CloseParen)
+                    return Internal::CreateNodeV<AST::FunctionCall>(functionNameToken->Str(), arguments);
+
+                // Checks for seperating comma //
+                if (!ctx.Expect(std::array{ Lexer::Token::Comma }))
+                    return Util::FunctionFail<ParserError>(); // <- TODO: Make an actual error
+                ctx.Advance();
+
+                // Adds the current argument to the ValueList //
+                arguments.push_back(ParsePrimary(ctx));
+            }
+        }
+
+        // Else fowards to the next function in the call stack //
+        return ParsePrimary(ctx);
+    }
+
     static Util::ReturnVal<AST::NodePtr, ParserError> ParseOperation(ParserContext& ctx)
     {}