[Bug] Generate $c to a _parenthesize_ expression to safely concatenate member reference with '.' right after

Author: buck-yeh

ParserGen/Output.cpp

@@ -1192,7 +1192,7 @@ void FC_Output::addParserMap(C_RenderReduction &rr, const std::string &className
     {
         std::string c = ARG_NAME_PARSER ".userData()";
         if (hasContext())
-            c = fmt::format("*static_cast<{}::C_Context*>({})", className, c);
+            c = "(*static_cast<" + className + "::C_Context*>(" + c + "))";
 
         rr.addMap("c", c, 1<<argInd);
     }

example/BisonGLR/Parser.cpp

@@ -554,7 +554,7 @@ void C_ParserPolicy::getReduceInfo(size_t id, C_ReduceInfo &info) const
 void C_ParserPolicy::onError(bux::GLR::C_Parser &_paRSeR_, const bux::C_SourcePos &pos, std::string_view message) const
 {
     // Grammar %ON_ERROR begins
-    *static_cast<::C_Parser::C_Context*>(_paRSeR_.userData()) <<"COL#" <<pos.m_Col <<": " <<message <<'\n';
+    (*static_cast<::C_Parser::C_Context*>(_paRSeR_.userData())) <<"COL#" <<pos.m_Col <<": " <<message <<'\n';
     // Grammar %ON_ERROR ends
 }