Fix stuff

src/lexer/lexer.cpp

@@ -90,7 +90,7 @@ namespace Solstice {
         return input[current + ahead];
     }
     std::optional<char> Lexer::consume() {
-        if (current + 1 >= input.size()) {
+        if (current >= input.size()) {
             return {};
         }
         return input[current++];

src/main.cpp

@@ -1,10 +1,19 @@
 #include "lexer/lexer.hpp"
 #include "parser/parser.hpp"
+#include <iostream>
+#include <stdexcept>
 
 int main() {
+    try {
         Solstice::Lexer lexer{"2 + 2"};
         auto lexed = lexer.lex();
 
         Solstice::Parser parser{lexed};
         auto parsed = parser.parse();
+
+    } catch (const std::runtime_error& e) {
+        std::cout << e.what() << std::endl;
+        return 1;
+    }
+    return 0;
 }

src/parser/parser.cpp

@@ -45,7 +45,6 @@ namespace Solstice {
         if (!left.has_value()) {
             throw std::runtime_error("Expecting expression on left of '+'");
         }
-        consume(); // be rid of the +
         Precedence precedence = getTokenPrecedence(Token(type));
         auto right = parseOneNode(precedence);
         if (!right.has_value()) {