ready to design g4

src/semantic/semantic.cpp

@@ -1,4 +1,17 @@
 #include "semantic.h"
+#include <iostream>
+#include "MXLexer.h"
+#include "MXParser.h"
+#include "antlr4-runtime.h"
+#include "visitor.h"
 int SemanticCheck(std::istream &fin) {
-  ;
+  antlr4::ANTLRInputStream input(fin);
+  MXLexer lexer(&input);
+  antlr4::CommonTokenStream tokens(&lexer);
+  tokens.fill();
+  MXParser parser(&tokens);
+  antlr4::tree::ParseTree *tree = parser.mxprog();
+  Visitor visitor;
+  visitor.visit(tree);
+  return 0;
 }