Add copy of part 2 project for part 3

03/main.cpp

@@ -0,0 +1,15 @@
+#include "ast.hpp"
+#include "parser.hpp"
+#include "type.hpp"
+
+void yy::parser::error(const std::string& msg) {
+    std::cout << "An error occured: " << msg << std::endl;
+}
+
+extern std::vector<definition_ptr> program;
+
+int main() {
+    yy::parser parser;
+    parser.parse();
+    std::cout << program.size() << std::endl;
+}