ready to build AST

src/main.cpp

@@ -21,8 +21,18 @@ int main(int argc, char **argv) {
   auto input_file = program.get<std::string>("input");
   auto output_file = program.get<std::string>("output");
   std::ifstream fin(input_file);
-  int err_code = SemanticCheck(fin);
-  if (err_code != 0) return err_code;
-
+  std::shared_ptr<ASTNodeBase> ast;
+  try {
+    SemanticCheck(fin, ast);
+  } catch (const SemanticError &err) {
+    std::cout << err.what() << std::endl;
+    return err.GetErrorCode();
+  } catch (const std::exception &err) {
+    std::cout << "Unknown error: " << err.what() << std::endl;
+    return 254;
+  } catch (...) {
+    std::cout << "Unknown error without message" << std::endl;
+    return 255;
+  }
   return 0;
 }