Added basics for lexing index expressions

src/Parser/Lexer.cpp

@@ -65,8 +65,14 @@ IToken* Lexer::LexNext(char c){
             return new SimpleToken(TokenKind::OpenParenthesis, this -> _position - 1, 1);
         case ')':
             return new SimpleToken(TokenKind::CloseParenthesis, this -> _position - 1, 1);
+        case '[':
+            return new SimpleToken(TokenKind::OpenSquareBracket, this -> _position - 1, 1);
+        case ']':
+            return new SimpleToken(TokenKind::CloseSquareBracket, this -> _position - 1, 1);
         case ',':
             return new SimpleToken(TokenKind::CommaToken, this -> _position - 1, 1);
+        case '.':
+            return new SimpleToken(TokenKind::PeriodToken, this -> _position - 1, 1);
         case '=':
             if (Lexer::Peek() == '='){
                 Lexer::Next();

src/Parser/Parser.cpp

@@ -139,9 +139,17 @@ ParsedStatement *Parser::ParseFunctionDeclaration(IToken *current) {
 
 ParsedExpression* Parser::ParseExpression(IToken* current){
     auto expression = this -> ParseBinaryExpression(current, OperatorPrecedence::No);
-    while (this -> Peek() -> GetKind() == TokenKind::OpenParenthesis){
-        expression = this->ParseFunctionCallExpression(expression);
-        //TODO: Function Evaluation
+    auto peekKind = this->Peek()->GetKind();
+    while (peekKind == TokenKind::OpenParenthesis ||
+           peekKind == TokenKind::OpenSquareBracket ||
+           peekKind == TokenKind::PeriodToken){
+        if (peekKind == TokenKind::OpenParenthesis){
+            expression = this->ParseFunctionCallExpression(expression);
+        } else if (peekKind == TokenKind::OpenSquareBracket){
+            //TODO: index expression
+        } else {
+            //TODO: index period expression
+        }
     }
     return expression;
 }

src/Parser/TokenKind.hpp

@@ -15,6 +15,10 @@ enum class TokenKind{
     InequalityToken,
     OpenParenthesis,
     CloseParenthesis,
+    OpenSquareBracket,
+    CloseSquareBracket,
+
+    PeriodToken,
     CommaToken,
 
     Identifier,