introduce transpile to cpp

src/toCPPListener.cpp

@@ -0,0 +1,79 @@
+#include "bfeParser.h"
+#include "bfeBaseListener.h"
+#include "toCPPListener.hpp"
+// #include "bfBaseVisitor.h"
+
+using namespace antlr4;
+
+void toCPPListener::enterProgram(bfeParser::ProgramContext *ctx)
+{
+    printStack.push_back("#include<iostream>\n#include<vector>\nusing namespace std;\nint main(){\nvector<char> vec(1000,0);int ptr = 0;\n");
+}
+void toCPPListener::exitProgram(bfeParser::ProgramContext *ctx)
+{
+    std::cout << printStack.front() << "}\n"<< std::endl;
+}
+void toCPPListener::enterPtrIncr(bfeParser::PtrIncrContext *ctx)
+{
+    // printStack.back() += "+";
+    printStack.back()+= "vec[ptr]++;\n";
+}
+void toCPPListener::enterPtrDecr(bfeParser::PtrDecrContext *ctx)
+{
+    // printStack.back() += ("-");
+    printStack.back()+= "vec[ptr]--;\n";
+}
+void toCPPListener::enterPtrLeft(bfeParser::PtrLeftContext *ctx)
+{
+    // printStack.back() += ("<");
+    printStack.back() += ("ptr--;\n");
+}
+void toCPPListener::enterPtrRight(bfeParser::PtrRightContext *ctx)
+{
+
+    printStack.back() += ("ptr++;\n");
+}
+
+void toCPPListener::enterNumberedStmt(bfeParser::NumberedStmtContext *ctx)
+{
+    printStack.push_back("");
+}
+void toCPPListener::exitNumberedStmt(bfeParser::NumberedStmtContext *ctx)
+{
+    std::string s = printStack.back();
+    printStack.pop_back();
+    int n = stoi(ctx->NUMBER()->getText());
+    for (int i = 0; i < n; i++)
+    {
+        printStack.back() += s;
+    }
+}
+void toCPPListener::enterLoopStmt(bfeParser::LoopStmtContext *ctx){
+    printStack.push_back("");
+}
+void toCPPListener::exitLoopStmt(bfeParser::LoopStmtContext *ctx){
+    std::string s = printStack.back();
+    printStack.pop_back();
+    printStack.back()+= "while(vec[ptr]){\n"+s+"}\n";
+}
+
+void toCPPListener::enterOutputStmt(bfeParser::OutputStmtContext *ctx){
+    std::string s = printStack.back();
+    // printStack.pop_back();
+    printStack.back()+= "cout<<vec[ptr];\n";
+}
+
+void toCPPListener::enterInputStmt(bfeParser::InputStmtContext *ctx){
+    // std::string s = printStack.back();
+    // printStack.pop_back();
+    printStack.back()+= "cin>>vec[ptr];\n";
+}
+
+void toCPPListener::enterGroupedStmt(bfeParser::GroupedStmtContext *ctx){
+    printStack.push_back("");
+}
+void toCPPListener::exitGroupedStmt(bfeParser::GroupedStmtContext *ctx){
+    std::string s = printStack.back();
+    printStack.pop_back();
+    printStack.back()+=(s);
+}