add antlr

src/main.cpp

@@ -1,5 +1,33 @@
-#include<iostream>
+#include <iostream>
+#include <antlr4-common.h>
+#include "main.hpp"
+#include "bfLexer.h"
+#include "bfParser.h"
+#include "bfBaseListener.h"
+// #include "bfBaseVisitor.h"
 
-int main(){
-    std::cout<<"Hello World"<<std::endl;
+using namespace antlr4;
+
+class expressionListener : public bfBaseListener{
+    public:
+       void enterProgram(bfParser::ProgramContext *ctx) override{
+           std::cout<<ctx->getText();
+       }
+};
+
+int main(int argc, const char* argv[])
+{
+    // std::cout<<"Hello World "<<FIVE<<std::endl;
+    std::ifstream stream;
+    stream.open(argv[1]);
+    ANTLRInputStream input(stream);
+    bfLexer lexer(&input);
+    CommonTokenStream tokens(&lexer);
+    bfParser parser(&tokens);
+
+    tree::ParseTree *tree = parser.program();
+    expressionListener listener;
+    tree::ParseTreeWalker::DEFAULT.walk(&listener, tree);
+
+    return 0;
 }