introduce transpile to cpp

src/main.cpp

@@ -7,6 +7,7 @@
 #include "bfeLexer.h"
 #include "bfeParser.h"
 #include "toBFListener.hpp"
+#include "toCPPListener.hpp"
 #include "executeBFE.hpp"
 
 using namespace antlr4;
@@ -16,54 +17,76 @@ int main(int argc, char **argv)
     cxxopts::Options options(argv[0], "An interpreter/translator for bfe");
 
     options.add_options()
-        ("t,translate", "Translate to bf", cxxopts::value<bool>()->default_value("false"))
-        ("i,input", "Input(First argument)", cxxopts::value<std::string>())
-        ("h,help", "Print usage");
+    ("a,action", "Action (exec,cpp,bf)", cxxopts::value<std::string>()->default_value("exec"))
+    ("i,input", "Input (First argument)", cxxopts::value<std::string>())
+    ("h,help", "Print usage");
     options.parse_positional({"input"});
-    auto results = options.parse(argc, argv);
-    if (results.count("help"))
+    // try
     {
-        std::cout << options.help() << std::endl;
-        return 0;
-    }
-    if (results.count("input"))
-    {
-        // std::cout << results["input"].as<std::string>()<<std::endl;
-        std::ifstream stream;
-        bool outFile = false;
-        stream.open(results["input"].as<std::string>());
-        if (stream.fail())
+        auto results = options.parse(argc, argv);
+        std::string action = results["action"].as<std::string>();
+        if (action.compare("exec") && action.compare("bf") && action.compare("cpp"))
         {
-            std::cout << "Could not open" << std::endl;
+            action = std::string( "exec");
+        }
+        if (results.count("help"))
+        {
+            std::cout << options.help() << std::endl;
+            return 0;
+        }
+        if (results.count("input"))
+        {
+            // std::cout << results["input"].as<std::string>()<<std::endl;
+            std::ifstream stream;
+            bool outFile = false;
+            stream.open(results["input"].as<std::string>());
+            if (stream.fail())
+            {
+                std::cout << "Could not open" << std::endl;
+                return 1;
+            }
+            ANTLRInputStream input(stream);
+            bfeLexer lexer(&input);
+            CommonTokenStream tokens(&lexer);
+            bfeParser parser(&tokens);
+
+            tree::ParseTree *tree = parser.program();
+            if (action.compare("bf")==0)
+            {
+                toBFListener listener;
+                tree::ParseTreeWalker::DEFAULT.walk(&listener, tree);
+            }
+            else if (action.compare( "exec")==0)
+            {
+                executeBGE *visitor = new executeBGE();
+                try
+                {
+                    visitor->visit(tree);
+                    std::cout << std::endl;
+                }
+                catch (std::string e)
+                {
+                    std::cout << "\nIllegal:" << e << std::endl;
+                }
+            }
+            else
+            {
+                //else cpp
+                toCPPListener listener;
+                tree::ParseTreeWalker::DEFAULT.walk(&listener, tree);
+            }
+        }
+        else
+        {
+            std::cout << "?:Expected file" << std::endl;
             return 1;
         }
-        ANTLRInputStream input(stream);
-        bfeLexer lexer(&input);
-        CommonTokenStream tokens(&lexer);
-        bfeParser parser(&tokens);
-
-        tree::ParseTree *tree = parser.program();
-        if(results["translate"].as<bool>()){
-            toBFListener listener;
-            tree::ParseTreeWalker::DEFAULT.walk(&listener, tree);
-        }else{
-            executeBGE *visitor = new executeBGE();
-            try
-            {
-                visitor->visit(tree);
-                std::cout << std::endl;
-            }
-            catch (std::string e)
-            {
-                std::cout << "\nIllegal:" << e<<std::endl;
-            }
-        }
-    }else{
-        std::cout<<"?:Expected file"<<std::endl;
-        return 1;
     }
-    
-    
+    // catch (std::exception e)
+    // {
+    //     std::cout << "E:" << e.what() << "\n";
+    //     return 1;
+    // }
 
     // if(argc>2 && )
     return 0;

src/toBFListener.cpp

@@ -29,6 +29,12 @@ void toBFListener::enterPtrRight(bfeParser::PtrRightContext *ctx)
 {
     printStack.back() += (">");
 }
+void toBFListener::enterOutputStmt(bfeParser::OutputStmtContext *ctx) {
+    printStack.back() += (".");
+}
+void toBFListener::enterInputStmt(bfeParser::InputStmtContext *ctx) {
+    printStack.back() += (",");
+}
 
 void toBFListener::enterNumberedStmt(bfeParser::NumberedStmtContext *ctx)
 {
@@ -44,9 +50,14 @@ void toBFListener::exitNumberedStmt(bfeParser::NumberedStmtContext *ctx)
         printStack.back() += s;
     }
 }
+
+
+
 void toBFListener::enterLoopStmt(bfeParser::LoopStmtContext *ctx){
     printStack.push_back("");
 }
+
+
 void toBFListener::exitLoopStmt(bfeParser::LoopStmtContext *ctx){
     std::string s = printStack.back();
     printStack.pop_back();

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);
+}