fix(frontend): 规范一下前端实现

src/frontend/AntlrDriver.cpp

@@ -12,6 +12,10 @@
 
 namespace {
 
+bool HasParsePrefix(const std::string& msg) {
+  return msg.rfind("[parse]", 0) == 0;
+}
+
 class ParseErrorListener : public antlr4::BaseErrorListener {
  public:
   void syntaxError(antlr4::Recognizer* /*recognizer*/, antlr4::Token* /*offendingSymbol*/,
@@ -49,6 +53,9 @@ AntlrResult ParseFileWithAntlr(const std::string& path) {
   } catch (const std::exception& ex) {
     const std::string msg = ex.what();
     if (!msg.empty()) {
+      if (HasParsePrefix(msg)) {
+        throw;
+      }
       throw std::runtime_error("[parse] 暂不支持的语法/词法 - " + msg);
     }
     if (auto* tok = parser->getCurrentToken()) {