Create .gitattributes

mark generated files

.gitattributes

@@ -0,0 +1 @@
+lib/generated/* linguist-generated

.gitignore

@@ -1,6 +1,6 @@
 .antlr/
 build/
-lib/
+# lib/
 # Prerequisites
 thirdparty/antlr/*.jar
 *.d

.vscode/c_cpp_properties.json

@@ -1,19 +0,0 @@
-{
-    "configurations": [
-        {
-            "name": "Linux",
-            "includePath": [
-                "${workspaceFolder}/include",
-                "${workspaceFolder}/**",
-                "${workspaceFolder}/lib/generated"
-            ],
-            "defines": [],
-            "compilerPath": "/usr/lib64/ccache/clang",
-            "cStandard": "c11",
-            "cppStandard": "c++14",
-            "intelliSenseMode": "clang-x64",
-            "configurationProvider": "ms-vscode.cmake-tools"
-        }
-    ],
-    "version": 4
-}

.vscode/launch.json

@@ -10,7 +10,7 @@
             "name": "Grammar - simple.bfe",
             "input": "samples/simple.bfe",
             "visualParseTree": true,
-            "grammar": "${workspaceFolder}/grammar/bf.g4"
+            "grammar": "${workspaceFolder}/grammar/bfe.g4"
         },
         {
             "type": "antlr-debug",
@@ -18,7 +18,15 @@
             "name": "Grammar - group.bfe",
             "input": "samples/group.bfe",
             "visualParseTree": true,
-            "grammar": "${workspaceFolder}/grammar/bf.g4"
+            "grammar": "${workspaceFolder}/grammar/bfe.g4"
+        },
+        {
+            "type": "antlr-debug",
+            "request": "launch",
+            "name": "Grammar - testmem.bfe",
+            "input": "samples/testmem.bfe",
+            "visualParseTree": true,
+            "grammar": "${workspaceFolder}/grammar/bfe.g4"
         },
         {
             "name": "GDB - simple.bfe",
@@ -39,6 +47,25 @@
                 }
             ]
         },
+        {
+            "name": "GDB - simple.bfe - Translate to BF",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/main.out",
+            "args": ["samples/simple.bfe","-a","bf"],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ]
+        },
         {
             "name": "GDB - group.bfe",
             "type": "cppdbg",
@@ -57,6 +84,44 @@
                     "ignoreFailures": true
                 }
             ]
+        },
+        {
+            "name": "GDB - error.bfe",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/main.out",
+            "args": ["samples/error.bfe"],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ]
+        },
+        {
+            "name": "GDB - testmem.bfe",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/main.out",
+            "args": ["samples/testmem.bfe"],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                }
+            ]
         }
     ]
 }

.vscode/settings.json

@@ -70,6 +70,8 @@
         "streambuf": "cpp",
         "thread": "cpp",
         "cinttypes": "cpp",
-        "typeinfo": "cpp"
+        "typeinfo": "cpp",
+        "regex": "cpp",
+        "shared_mutex": "cpp"
     }
 }

CMakeLists.txt

@@ -10,6 +10,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED True)
 set(SOURCES
     src/main.cpp
     src/toBFListener.cpp
+    src/toCPPListener.cpp
     src/executeBFE.cpp
     lib/generated/bfeLexer.cpp
     lib/generated/bfeParser.cpp
@@ -20,12 +21,13 @@ set(SOURCES
 )
 add_executable(main.out ${SOURCES})
 
-target_link_libraries(main.out ${PROJECT_SOURCE_DIR}/lib/antlr4/lib/libantlr4-runtime.a)
+target_link_libraries(main.out libantlr4-runtime.so)
+# target_link_libraries(main.out ${PROJECT_SOURCE_DIR}/lib/antlr4/lib/libantlr4-runtime.a)
 
 target_include_directories(main.out
     PUBLIC
         ${PROJECT_SOURCE_DIR}/lib/generated
         ${PROJECT_SOURCE_DIR}/include
-        ${PROJECT_SOURCE_DIR}/lib/antlr4/include
-
+        ${PROJECT_SOURCE_DIR}/lib/cxxopts/include
+        /usr/include/antlr4-runtime
 )

README.md

@@ -1,25 +1,75 @@
-# bfc
+# (+97>)3<3+>+5>+2<2(.>)3 (*.bfe)
 
-An extension of a language that shall not be named
+A slight syntactic superset of BF.
 
-*Hello world*
+Development requirements:
+1. cxxopts -> v2.2.1
+2. antlr4 -> v4
+
+
+*HelloWorld.bfe*
 ```
 -[-7>+<]>-.-[->+5<]>++.+7..+3.[-3>+<]>-5.--[->+4<]>-.-8.+3.-6.-8.
 ```
 
-## Setup oddities
+## Functions
 
-1. Copy antlr4's cpp libs to `./libs/antlr4`. (Please take care that the include folder points straight to the files not to `antlr-runtime`)
-2. Copy `antlr-4.8-complete.jar` to `./thirdparty/antlr`.
-3. Generate parsers to `./libs/generated` or use VSCode with the ANTLR extension.
+1. Interpret bfe(and bf) files
+2. Convert bf/bfe to bf
+3. Convert bf/bfe to C++ (not optimized)
 
 
+## Usage
+
+```sh
+./bfc -h #Help
+./bfc prog.bfe #Execute
+./bfc prog.bfe -a bf #Translate file to bf
+./bfc prog.bfe -a cpp # Translate file to cpp
+```
+
+## Syntax
+
+**Basic**
+
+```bf
+,. IO
+<> Address manipulation
++- Value manipulation
+[] Looping construct
+```
+**Comments**
+
+`//` - Single Line
+
+`/* */` - Multi Line
+
+**Repeats**
+
+```
+<symbol><number>
+(<symbols>)<number>
+```
+Eg.
+```
++65. //prints A
+>
+(+65>)3 //stores AAA
+(<.)3   //prints AAA
+```
+
+
+## Setup oddities (dev)
+
+1. Generate parsers to `./libs/generated` or use VSCode with the ANTLR extension or use a downloaded ANTLR JAR.
+
 ## Todo (Tentative)
 
 - [ ] Grammar
     - [X] Number shorthand
     - [X] Loop statements
+    - [X] Ignore rest
     - [ ] Shorthand segments
-- [ ] Processing
+- [X] Processing
     - [X] Translate to bf
-    - [ ] Execute result
+    - [X] Execute results

grammar/bfe.g4

@@ -68,7 +68,6 @@ outputStmt
 NEWLINE: '\n' -> skip;
 COMMENT: '//' ~[\r\n]* '\r'? '\n'? -> channel(HIDDEN);
 ML_COMMENT: '/*' .*? '*/' ->channel(HIDDEN); 
-WS: [ \r\n] -> skip;
 DEF: '#';
 LOOPSTART: '[';
 LOOPEND:']';
@@ -81,3 +80,6 @@ DEC: '-';
 INC: '+';
 LEFT: '<';
 RIGHT: '>';
+EVERYTHING_ELSE: . ->channel(HIDDEN);
+WS: [ \r\n] -> skip;
+

include/executeBFE.hpp

@@ -9,11 +9,11 @@ using namespace antlr4;
 using namespace antlrcpp;
 // using namespace std;
 class executeBGE: public bfeBaseVisitor{
-    private:
+    protected:
         std::vector<char> memory;
         int pointer=0;
     public:
-        executeBGE() : bfeBaseVisitor(),memory(100) {
+        executeBGE() : bfeBaseVisitor(),memory(1) {
         }
         // Any visitProgram(bfeParser::ProgramContext*) override;
         Any visitNumberedStmt(bfeParser::NumberedStmtContext*) override;

include/toBFListener.hpp

@@ -22,4 +22,6 @@ class toBFListener : public bfeBaseListener {
         void exitLoopStmt(bfeParser::LoopStmtContext *ctx) override;
         void enterGroupedStmt(bfeParser::GroupedStmtContext *ctx) override;
         void exitGroupedStmt(bfeParser::GroupedStmtContext *ctx) override;
+        void enterOutputStmt(bfeParser::OutputStmtContext *ctx) override;
+        void enterInputStmt(bfeParser::InputStmtContext *ctx) override;
 };

include/toCPPListener.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include<string>
+#include "bfeLexer.h"
+#include "bfeParser.h"
+#include "bfeBaseListener.h"
+
+
+class toCPPListener : public bfeBaseListener {
+    protected:
+        std::vector<std::string> printStack;
+    public:
+        void enterProgram(bfeParser::ProgramContext *ctx) override;
+        void exitProgram(bfeParser::ProgramContext *ctx) override ;
+        void enterPtrIncr(bfeParser::PtrIncrContext *ctx) override;
+        void enterPtrDecr(bfeParser::PtrDecrContext *ctx) override;
+        void enterPtrLeft(bfeParser::PtrLeftContext *ctx) override;
+        void enterPtrRight(bfeParser::PtrRightContext *ctx) override;
+        void enterNumberedStmt(bfeParser::NumberedStmtContext *ctx) override;
+        void exitNumberedStmt(bfeParser::NumberedStmtContext *ctx) override;
+        void enterLoopStmt(bfeParser::LoopStmtContext *ctx) override;
+        void exitLoopStmt(bfeParser::LoopStmtContext *ctx) override;
+        void enterGroupedStmt(bfeParser::GroupedStmtContext *ctx) override;
+        void exitGroupedStmt(bfeParser::GroupedStmtContext *ctx) override;
+        void enterOutputStmt(bfeParser::OutputStmtContext *ctx) override;
+        void enterInputStmt(bfeParser::InputStmtContext *ctx) override;
+};

lib/generated/bfe.tokens

@@ -0,0 +1,29 @@
+NEWLINE=1
+COMMENT=2
+ML_COMMENT=3
+DEF=4
+LOOPSTART=5
+LOOPEND=6
+GRPSTART=7
+GRPEND=8
+NUMBER=9
+INPUT=10
+OUTPUT=11
+DEC=12
+INC=13
+LEFT=14
+RIGHT=15
+EVERYTHING_ELSE=16
+WS=17
+'\n'=1
+'#'=4
+'['=5
+']'=6
+'('=7
+')'=8
+','=10
+'.'=11
+'-'=12
+'+'=13
+'<'=14
+'>'=15

lib/generated/bfeBaseListener.cpp

@@ -0,0 +1,7 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+
+#include "bfeBaseListener.h"
+
+

lib/generated/bfeBaseListener.h

@@ -0,0 +1,68 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+#pragma once
+
+
+#include "antlr4-runtime.h"
+#include "bfeListener.h"
+
+
+/**
+ * This class provides an empty implementation of bfeListener,
+ * which can be extended to create a listener which only needs to handle a subset
+ * of the available methods.
+ */
+class  bfeBaseListener : public bfeListener {
+public:
+
+  virtual void enterProgram(bfeParser::ProgramContext * /*ctx*/) override { }
+  virtual void exitProgram(bfeParser::ProgramContext * /*ctx*/) override { }
+
+  virtual void enterStatements(bfeParser::StatementsContext * /*ctx*/) override { }
+  virtual void exitStatements(bfeParser::StatementsContext * /*ctx*/) override { }
+
+  virtual void enterEligibleStmt(bfeParser::EligibleStmtContext * /*ctx*/) override { }
+  virtual void exitEligibleStmt(bfeParser::EligibleStmtContext * /*ctx*/) override { }
+
+  virtual void enterNumberedStmt(bfeParser::NumberedStmtContext * /*ctx*/) override { }
+  virtual void exitNumberedStmt(bfeParser::NumberedStmtContext * /*ctx*/) override { }
+
+  virtual void enterStmt(bfeParser::StmtContext * /*ctx*/) override { }
+  virtual void exitStmt(bfeParser::StmtContext * /*ctx*/) override { }
+
+  virtual void enterGroupedStmt(bfeParser::GroupedStmtContext * /*ctx*/) override { }
+  virtual void exitGroupedStmt(bfeParser::GroupedStmtContext * /*ctx*/) override { }
+
+  virtual void enterLoopStmt(bfeParser::LoopStmtContext * /*ctx*/) override { }
+  virtual void exitLoopStmt(bfeParser::LoopStmtContext * /*ctx*/) override { }
+
+  virtual void enterBasicStmt(bfeParser::BasicStmtContext * /*ctx*/) override { }
+  virtual void exitBasicStmt(bfeParser::BasicStmtContext * /*ctx*/) override { }
+
+  virtual void enterPtrIncr(bfeParser::PtrIncrContext * /*ctx*/) override { }
+  virtual void exitPtrIncr(bfeParser::PtrIncrContext * /*ctx*/) override { }
+
+  virtual void enterPtrDecr(bfeParser::PtrDecrContext * /*ctx*/) override { }
+  virtual void exitPtrDecr(bfeParser::PtrDecrContext * /*ctx*/) override { }
+
+  virtual void enterPtrLeft(bfeParser::PtrLeftContext * /*ctx*/) override { }
+  virtual void exitPtrLeft(bfeParser::PtrLeftContext * /*ctx*/) override { }
+
+  virtual void enterPtrRight(bfeParser::PtrRightContext * /*ctx*/) override { }
+  virtual void exitPtrRight(bfeParser::PtrRightContext * /*ctx*/) override { }
+
+  virtual void enterInputStmt(bfeParser::InputStmtContext * /*ctx*/) override { }
+  virtual void exitInputStmt(bfeParser::InputStmtContext * /*ctx*/) override { }
+
+  virtual void enterOutputStmt(bfeParser::OutputStmtContext * /*ctx*/) override { }
+  virtual void exitOutputStmt(bfeParser::OutputStmtContext * /*ctx*/) override { }
+
+
+  virtual void enterEveryRule(antlr4::ParserRuleContext * /*ctx*/) override { }
+  virtual void exitEveryRule(antlr4::ParserRuleContext * /*ctx*/) override { }
+  virtual void visitTerminal(antlr4::tree::TerminalNode * /*node*/) override { }
+  virtual void visitErrorNode(antlr4::tree::ErrorNode * /*node*/) override { }
+
+};
+

lib/generated/bfeBaseVisitor.cpp

@@ -0,0 +1,7 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+
+#include "bfeBaseVisitor.h"
+
+

lib/generated/bfeBaseVisitor.h

@@ -0,0 +1,76 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+#pragma once
+
+
+#include "antlr4-runtime.h"
+#include "bfeVisitor.h"
+
+
+/**
+ * This class provides an empty implementation of bfeVisitor, which can be
+ * extended to create a visitor which only needs to handle a subset of the available methods.
+ */
+class  bfeBaseVisitor : public bfeVisitor {
+public:
+
+  virtual antlrcpp::Any visitProgram(bfeParser::ProgramContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitStatements(bfeParser::StatementsContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitEligibleStmt(bfeParser::EligibleStmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitNumberedStmt(bfeParser::NumberedStmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitStmt(bfeParser::StmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitGroupedStmt(bfeParser::GroupedStmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitLoopStmt(bfeParser::LoopStmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitBasicStmt(bfeParser::BasicStmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitPtrIncr(bfeParser::PtrIncrContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitPtrDecr(bfeParser::PtrDecrContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitPtrLeft(bfeParser::PtrLeftContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitPtrRight(bfeParser::PtrRightContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitInputStmt(bfeParser::InputStmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+  virtual antlrcpp::Any visitOutputStmt(bfeParser::OutputStmtContext *ctx) override {
+    return visitChildren(ctx);
+  }
+
+
+};
+

lib/generated/bfeLexer.cpp

@@ -0,0 +1,192 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+
+#include "bfeLexer.h"
+
+
+using namespace antlr4;
+
+
+bfeLexer::bfeLexer(CharStream *input) : Lexer(input) {
+  _interpreter = new atn::LexerATNSimulator(this, _atn, _decisionToDFA, _sharedContextCache);
+}
+
+bfeLexer::~bfeLexer() {
+  delete _interpreter;
+}
+
+std::string bfeLexer::getGrammarFileName() const {
+  return "bfe.g4";
+}
+
+const std::vector<std::string>& bfeLexer::getRuleNames() const {
+  return _ruleNames;
+}
+
+const std::vector<std::string>& bfeLexer::getChannelNames() const {
+  return _channelNames;
+}
+
+const std::vector<std::string>& bfeLexer::getModeNames() const {
+  return _modeNames;
+}
+
+const std::vector<std::string>& bfeLexer::getTokenNames() const {
+  return _tokenNames;
+}
+
+dfa::Vocabulary& bfeLexer::getVocabulary() const {
+  return _vocabulary;
+}
+
+const std::vector<uint16_t> bfeLexer::getSerializedATN() const {
+  return _serializedATN;
+}
+
+const atn::ATN& bfeLexer::getATN() const {
+  return _atn;
+}
+
+
+
+
+// Static vars and initialization.
+std::vector<dfa::DFA> bfeLexer::_decisionToDFA;
+atn::PredictionContextCache bfeLexer::_sharedContextCache;
+
+// We own the ATN which in turn owns the ATN states.
+atn::ATN bfeLexer::_atn;
+std::vector<uint16_t> bfeLexer::_serializedATN;
+
+std::vector<std::string> bfeLexer::_ruleNames = {
+  u8"NEWLINE", u8"COMMENT", u8"ML_COMMENT", u8"DEF", u8"LOOPSTART", u8"LOOPEND", 
+  u8"GRPSTART", u8"GRPEND", u8"NUMBER", u8"INPUT", u8"OUTPUT", u8"DEC", 
+  u8"INC", u8"LEFT", u8"RIGHT", u8"EVERYTHING_ELSE", u8"WS"
+};
+
+std::vector<std::string> bfeLexer::_channelNames = {
+  "DEFAULT_TOKEN_CHANNEL", "HIDDEN"
+};
+
+std::vector<std::string> bfeLexer::_modeNames = {
+  u8"DEFAULT_MODE"
+};
+
+std::vector<std::string> bfeLexer::_literalNames = {
+  "", u8"'\n'", "", "", u8"'#'", u8"'['", u8"']'", u8"'('", u8"')'", "", 
+  u8"','", u8"'.'", u8"'-'", u8"'+'", u8"'<'", u8"'>'"
+};
+
+std::vector<std::string> bfeLexer::_symbolicNames = {
+  "", u8"NEWLINE", u8"COMMENT", u8"ML_COMMENT", u8"DEF", u8"LOOPSTART", 
+  u8"LOOPEND", u8"GRPSTART", u8"GRPEND", u8"NUMBER", u8"INPUT", u8"OUTPUT", 
+  u8"DEC", u8"INC", u8"LEFT", u8"RIGHT", u8"EVERYTHING_ELSE", u8"WS"
+};
+
+dfa::Vocabulary bfeLexer::_vocabulary(_literalNames, _symbolicNames);
+
+std::vector<std::string> bfeLexer::_tokenNames;
+
+bfeLexer::Initializer::Initializer() {
+  // This code could be in a static initializer lambda, but VS doesn't allow access to private class members from there.
+	for (size_t i = 0; i < _symbolicNames.size(); ++i) {
+		std::string name = _vocabulary.getLiteralName(i);
+		if (name.empty()) {
+			name = _vocabulary.getSymbolicName(i);
+		}
+
+		if (name.empty()) {
+			_tokenNames.push_back("<INVALID>");
+		} else {
+      _tokenNames.push_back(name);
+    }
+	}
+
+  _serializedATN = {
+    0x3, 0x608b, 0xa72a, 0x8133, 0xb9ed, 0x417c, 0x3be7, 0x7786, 0x5964, 
+    0x2, 0x13, 0x6b, 0x8, 0x1, 0x4, 0x2, 0x9, 0x2, 0x4, 0x3, 0x9, 0x3, 0x4, 
+    0x4, 0x9, 0x4, 0x4, 0x5, 0x9, 0x5, 0x4, 0x6, 0x9, 0x6, 0x4, 0x7, 0x9, 
+    0x7, 0x4, 0x8, 0x9, 0x8, 0x4, 0x9, 0x9, 0x9, 0x4, 0xa, 0x9, 0xa, 0x4, 
+    0xb, 0x9, 0xb, 0x4, 0xc, 0x9, 0xc, 0x4, 0xd, 0x9, 0xd, 0x4, 0xe, 0x9, 
+    0xe, 0x4, 0xf, 0x9, 0xf, 0x4, 0x10, 0x9, 0x10, 0x4, 0x11, 0x9, 0x11, 
+    0x4, 0x12, 0x9, 0x12, 0x3, 0x2, 0x3, 0x2, 0x3, 0x2, 0x3, 0x2, 0x3, 0x3, 
+    0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x7, 0x3, 0x2e, 0xa, 0x3, 0xc, 0x3, 0xe, 
+    0x3, 0x31, 0xb, 0x3, 0x3, 0x3, 0x5, 0x3, 0x34, 0xa, 0x3, 0x3, 0x3, 0x5, 
+    0x3, 0x37, 0xa, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x4, 0x3, 0x4, 0x3, 0x4, 
+    0x3, 0x4, 0x7, 0x4, 0x3f, 0xa, 0x4, 0xc, 0x4, 0xe, 0x4, 0x42, 0xb, 0x4, 
+    0x3, 0x4, 0x3, 0x4, 0x3, 0x4, 0x3, 0x4, 0x3, 0x4, 0x3, 0x5, 0x3, 0x5, 
+    0x3, 0x6, 0x3, 0x6, 0x3, 0x7, 0x3, 0x7, 0x3, 0x8, 0x3, 0x8, 0x3, 0x9, 
+    0x3, 0x9, 0x3, 0xa, 0x6, 0xa, 0x54, 0xa, 0xa, 0xd, 0xa, 0xe, 0xa, 0x55, 
+    0x3, 0xb, 0x3, 0xb, 0x3, 0xc, 0x3, 0xc, 0x3, 0xd, 0x3, 0xd, 0x3, 0xe, 
+    0x3, 0xe, 0x3, 0xf, 0x3, 0xf, 0x3, 0x10, 0x3, 0x10, 0x3, 0x11, 0x3, 
+    0x11, 0x3, 0x11, 0x3, 0x11, 0x3, 0x12, 0x3, 0x12, 0x3, 0x12, 0x3, 0x12, 
+    0x3, 0x40, 0x2, 0x13, 0x3, 0x3, 0x5, 0x4, 0x7, 0x5, 0x9, 0x6, 0xb, 0x7, 
+    0xd, 0x8, 0xf, 0x9, 0x11, 0xa, 0x13, 0xb, 0x15, 0xc, 0x17, 0xd, 0x19, 
+    0xe, 0x1b, 0xf, 0x1d, 0x10, 0x1f, 0x11, 0x21, 0x12, 0x23, 0x13, 0x3, 
+    0x2, 0x5, 0x4, 0x2, 0xc, 0xc, 0xf, 0xf, 0x3, 0x2, 0x32, 0x3b, 0x5, 0x2, 
+    0xc, 0xc, 0xf, 0xf, 0x22, 0x22, 0x2, 0x6f, 0x2, 0x3, 0x3, 0x2, 0x2, 
+    0x2, 0x2, 0x5, 0x3, 0x2, 0x2, 0x2, 0x2, 0x7, 0x3, 0x2, 0x2, 0x2, 0x2, 
+    0x9, 0x3, 0x2, 0x2, 0x2, 0x2, 0xb, 0x3, 0x2, 0x2, 0x2, 0x2, 0xd, 0x3, 
+    0x2, 0x2, 0x2, 0x2, 0xf, 0x3, 0x2, 0x2, 0x2, 0x2, 0x11, 0x3, 0x2, 0x2, 
+    0x2, 0x2, 0x13, 0x3, 0x2, 0x2, 0x2, 0x2, 0x15, 0x3, 0x2, 0x2, 0x2, 0x2, 
+    0x17, 0x3, 0x2, 0x2, 0x2, 0x2, 0x19, 0x3, 0x2, 0x2, 0x2, 0x2, 0x1b, 
+    0x3, 0x2, 0x2, 0x2, 0x2, 0x1d, 0x3, 0x2, 0x2, 0x2, 0x2, 0x1f, 0x3, 0x2, 
+    0x2, 0x2, 0x2, 0x21, 0x3, 0x2, 0x2, 0x2, 0x2, 0x23, 0x3, 0x2, 0x2, 0x2, 
+    0x3, 0x25, 0x3, 0x2, 0x2, 0x2, 0x5, 0x29, 0x3, 0x2, 0x2, 0x2, 0x7, 0x3a, 
+    0x3, 0x2, 0x2, 0x2, 0x9, 0x48, 0x3, 0x2, 0x2, 0x2, 0xb, 0x4a, 0x3, 0x2, 
+    0x2, 0x2, 0xd, 0x4c, 0x3, 0x2, 0x2, 0x2, 0xf, 0x4e, 0x3, 0x2, 0x2, 0x2, 
+    0x11, 0x50, 0x3, 0x2, 0x2, 0x2, 0x13, 0x53, 0x3, 0x2, 0x2, 0x2, 0x15, 
+    0x57, 0x3, 0x2, 0x2, 0x2, 0x17, 0x59, 0x3, 0x2, 0x2, 0x2, 0x19, 0x5b, 
+    0x3, 0x2, 0x2, 0x2, 0x1b, 0x5d, 0x3, 0x2, 0x2, 0x2, 0x1d, 0x5f, 0x3, 
+    0x2, 0x2, 0x2, 0x1f, 0x61, 0x3, 0x2, 0x2, 0x2, 0x21, 0x63, 0x3, 0x2, 
+    0x2, 0x2, 0x23, 0x67, 0x3, 0x2, 0x2, 0x2, 0x25, 0x26, 0x7, 0xc, 0x2, 
+    0x2, 0x26, 0x27, 0x3, 0x2, 0x2, 0x2, 0x27, 0x28, 0x8, 0x2, 0x2, 0x2, 
+    0x28, 0x4, 0x3, 0x2, 0x2, 0x2, 0x29, 0x2a, 0x7, 0x31, 0x2, 0x2, 0x2a, 
+    0x2b, 0x7, 0x31, 0x2, 0x2, 0x2b, 0x2f, 0x3, 0x2, 0x2, 0x2, 0x2c, 0x2e, 
+    0xa, 0x2, 0x2, 0x2, 0x2d, 0x2c, 0x3, 0x2, 0x2, 0x2, 0x2e, 0x31, 0x3, 
+    0x2, 0x2, 0x2, 0x2f, 0x2d, 0x3, 0x2, 0x2, 0x2, 0x2f, 0x30, 0x3, 0x2, 
+    0x2, 0x2, 0x30, 0x33, 0x3, 0x2, 0x2, 0x2, 0x31, 0x2f, 0x3, 0x2, 0x2, 
+    0x2, 0x32, 0x34, 0x7, 0xf, 0x2, 0x2, 0x33, 0x32, 0x3, 0x2, 0x2, 0x2, 
+    0x33, 0x34, 0x3, 0x2, 0x2, 0x2, 0x34, 0x36, 0x3, 0x2, 0x2, 0x2, 0x35, 
+    0x37, 0x7, 0xc, 0x2, 0x2, 0x36, 0x35, 0x3, 0x2, 0x2, 0x2, 0x36, 0x37, 
+    0x3, 0x2, 0x2, 0x2, 0x37, 0x38, 0x3, 0x2, 0x2, 0x2, 0x38, 0x39, 0x8, 
+    0x3, 0x3, 0x2, 0x39, 0x6, 0x3, 0x2, 0x2, 0x2, 0x3a, 0x3b, 0x7, 0x31, 
+    0x2, 0x2, 0x3b, 0x3c, 0x7, 0x2c, 0x2, 0x2, 0x3c, 0x40, 0x3, 0x2, 0x2, 
+    0x2, 0x3d, 0x3f, 0xb, 0x2, 0x2, 0x2, 0x3e, 0x3d, 0x3, 0x2, 0x2, 0x2, 
+    0x3f, 0x42, 0x3, 0x2, 0x2, 0x2, 0x40, 0x41, 0x3, 0x2, 0x2, 0x2, 0x40, 
+    0x3e, 0x3, 0x2, 0x2, 0x2, 0x41, 0x43, 0x3, 0x2, 0x2, 0x2, 0x42, 0x40, 
+    0x3, 0x2, 0x2, 0x2, 0x43, 0x44, 0x7, 0x2c, 0x2, 0x2, 0x44, 0x45, 0x7, 
+    0x31, 0x2, 0x2, 0x45, 0x46, 0x3, 0x2, 0x2, 0x2, 0x46, 0x47, 0x8, 0x4, 
+    0x3, 0x2, 0x47, 0x8, 0x3, 0x2, 0x2, 0x2, 0x48, 0x49, 0x7, 0x25, 0x2, 
+    0x2, 0x49, 0xa, 0x3, 0x2, 0x2, 0x2, 0x4a, 0x4b, 0x7, 0x5d, 0x2, 0x2, 
+    0x4b, 0xc, 0x3, 0x2, 0x2, 0x2, 0x4c, 0x4d, 0x7, 0x5f, 0x2, 0x2, 0x4d, 
+    0xe, 0x3, 0x2, 0x2, 0x2, 0x4e, 0x4f, 0x7, 0x2a, 0x2, 0x2, 0x4f, 0x10, 
+    0x3, 0x2, 0x2, 0x2, 0x50, 0x51, 0x7, 0x2b, 0x2, 0x2, 0x51, 0x12, 0x3, 
+    0x2, 0x2, 0x2, 0x52, 0x54, 0x9, 0x3, 0x2, 0x2, 0x53, 0x52, 0x3, 0x2, 
+    0x2, 0x2, 0x54, 0x55, 0x3, 0x2, 0x2, 0x2, 0x55, 0x53, 0x3, 0x2, 0x2, 
+    0x2, 0x55, 0x56, 0x3, 0x2, 0x2, 0x2, 0x56, 0x14, 0x3, 0x2, 0x2, 0x2, 
+    0x57, 0x58, 0x7, 0x2e, 0x2, 0x2, 0x58, 0x16, 0x3, 0x2, 0x2, 0x2, 0x59, 
+    0x5a, 0x7, 0x30, 0x2, 0x2, 0x5a, 0x18, 0x3, 0x2, 0x2, 0x2, 0x5b, 0x5c, 
+    0x7, 0x2f, 0x2, 0x2, 0x5c, 0x1a, 0x3, 0x2, 0x2, 0x2, 0x5d, 0x5e, 0x7, 
+    0x2d, 0x2, 0x2, 0x5e, 0x1c, 0x3, 0x2, 0x2, 0x2, 0x5f, 0x60, 0x7, 0x3e, 
+    0x2, 0x2, 0x60, 0x1e, 0x3, 0x2, 0x2, 0x2, 0x61, 0x62, 0x7, 0x40, 0x2, 
+    0x2, 0x62, 0x20, 0x3, 0x2, 0x2, 0x2, 0x63, 0x64, 0xb, 0x2, 0x2, 0x2, 
+    0x64, 0x65, 0x3, 0x2, 0x2, 0x2, 0x65, 0x66, 0x8, 0x11, 0x3, 0x2, 0x66, 
+    0x22, 0x3, 0x2, 0x2, 0x2, 0x67, 0x68, 0x9, 0x4, 0x2, 0x2, 0x68, 0x69, 
+    0x3, 0x2, 0x2, 0x2, 0x69, 0x6a, 0x8, 0x12, 0x2, 0x2, 0x6a, 0x24, 0x3, 
+    0x2, 0x2, 0x2, 0x8, 0x2, 0x2f, 0x33, 0x36, 0x40, 0x55, 0x4, 0x8, 0x2, 
+    0x2, 0x2, 0x3, 0x2, 
+  };
+
+  atn::ATNDeserializer deserializer;
+  _atn = deserializer.deserialize(_serializedATN);
+
+  size_t count = _atn.getNumberOfDecisions();
+  _decisionToDFA.reserve(count);
+  for (size_t i = 0; i < count; i++) { 
+    _decisionToDFA.emplace_back(_atn.getDecisionState(i), i);
+  }
+}
+
+bfeLexer::Initializer bfeLexer::_init;

lib/generated/bfeLexer.h

@@ -0,0 +1,58 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+#pragma once
+
+
+#include "antlr4-runtime.h"
+
+
+
+
+class  bfeLexer : public antlr4::Lexer {
+public:
+  enum {
+    NEWLINE = 1, COMMENT = 2, ML_COMMENT = 3, DEF = 4, LOOPSTART = 5, LOOPEND = 6, 
+    GRPSTART = 7, GRPEND = 8, NUMBER = 9, INPUT = 10, OUTPUT = 11, DEC = 12, 
+    INC = 13, LEFT = 14, RIGHT = 15, EVERYTHING_ELSE = 16, WS = 17
+  };
+
+  bfeLexer(antlr4::CharStream *input);
+  ~bfeLexer();
+
+  virtual std::string getGrammarFileName() const override;
+  virtual const std::vector<std::string>& getRuleNames() const override;
+
+  virtual const std::vector<std::string>& getChannelNames() const override;
+  virtual const std::vector<std::string>& getModeNames() const override;
+  virtual const std::vector<std::string>& getTokenNames() const override; // deprecated, use vocabulary instead
+  virtual antlr4::dfa::Vocabulary& getVocabulary() const override;
+
+  virtual const std::vector<uint16_t> getSerializedATN() const override;
+  virtual const antlr4::atn::ATN& getATN() const override;
+
+private:
+  static std::vector<antlr4::dfa::DFA> _decisionToDFA;
+  static antlr4::atn::PredictionContextCache _sharedContextCache;
+  static std::vector<std::string> _ruleNames;
+  static std::vector<std::string> _tokenNames;
+  static std::vector<std::string> _channelNames;
+  static std::vector<std::string> _modeNames;
+
+  static std::vector<std::string> _literalNames;
+  static std::vector<std::string> _symbolicNames;
+  static antlr4::dfa::Vocabulary _vocabulary;
+  static antlr4::atn::ATN _atn;
+  static std::vector<uint16_t> _serializedATN;
+
+
+  // Individual action functions triggered by action() above.
+
+  // Individual semantic predicate functions triggered by sempred() above.
+
+  struct Initializer {
+    Initializer();
+  };
+  static Initializer _init;
+};
+

lib/generated/bfeLexer.tokens

@@ -0,0 +1,29 @@
+NEWLINE=1
+COMMENT=2
+ML_COMMENT=3
+DEF=4
+LOOPSTART=5
+LOOPEND=6
+GRPSTART=7
+GRPEND=8
+NUMBER=9
+INPUT=10
+OUTPUT=11
+DEC=12
+INC=13
+LEFT=14
+RIGHT=15
+EVERYTHING_ELSE=16
+WS=17
+'\n'=1
+'#'=4
+'['=5
+']'=6
+'('=7
+')'=8
+','=10
+'.'=11
+'-'=12
+'+'=13
+'<'=14
+'>'=15

lib/generated/bfeListener.cpp

@@ -0,0 +1,7 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+
+#include "bfeListener.h"
+
+

lib/generated/bfeListener.h

@@ -0,0 +1,61 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+#pragma once
+
+
+#include "antlr4-runtime.h"
+#include "bfeParser.h"
+
+
+/**
+ * This interface defines an abstract listener for a parse tree produced by bfeParser.
+ */
+class  bfeListener : public antlr4::tree::ParseTreeListener {
+public:
+
+  virtual void enterProgram(bfeParser::ProgramContext *ctx) = 0;
+  virtual void exitProgram(bfeParser::ProgramContext *ctx) = 0;
+
+  virtual void enterStatements(bfeParser::StatementsContext *ctx) = 0;
+  virtual void exitStatements(bfeParser::StatementsContext *ctx) = 0;
+
+  virtual void enterEligibleStmt(bfeParser::EligibleStmtContext *ctx) = 0;
+  virtual void exitEligibleStmt(bfeParser::EligibleStmtContext *ctx) = 0;
+
+  virtual void enterNumberedStmt(bfeParser::NumberedStmtContext *ctx) = 0;
+  virtual void exitNumberedStmt(bfeParser::NumberedStmtContext *ctx) = 0;
+
+  virtual void enterStmt(bfeParser::StmtContext *ctx) = 0;
+  virtual void exitStmt(bfeParser::StmtContext *ctx) = 0;
+
+  virtual void enterGroupedStmt(bfeParser::GroupedStmtContext *ctx) = 0;
+  virtual void exitGroupedStmt(bfeParser::GroupedStmtContext *ctx) = 0;
+
+  virtual void enterLoopStmt(bfeParser::LoopStmtContext *ctx) = 0;
+  virtual void exitLoopStmt(bfeParser::LoopStmtContext *ctx) = 0;
+
+  virtual void enterBasicStmt(bfeParser::BasicStmtContext *ctx) = 0;
+  virtual void exitBasicStmt(bfeParser::BasicStmtContext *ctx) = 0;
+
+  virtual void enterPtrIncr(bfeParser::PtrIncrContext *ctx) = 0;
+  virtual void exitPtrIncr(bfeParser::PtrIncrContext *ctx) = 0;
+
+  virtual void enterPtrDecr(bfeParser::PtrDecrContext *ctx) = 0;
+  virtual void exitPtrDecr(bfeParser::PtrDecrContext *ctx) = 0;
+
+  virtual void enterPtrLeft(bfeParser::PtrLeftContext *ctx) = 0;
+  virtual void exitPtrLeft(bfeParser::PtrLeftContext *ctx) = 0;
+
+  virtual void enterPtrRight(bfeParser::PtrRightContext *ctx) = 0;
+  virtual void exitPtrRight(bfeParser::PtrRightContext *ctx) = 0;
+
+  virtual void enterInputStmt(bfeParser::InputStmtContext *ctx) = 0;
+  virtual void exitInputStmt(bfeParser::InputStmtContext *ctx) = 0;
+
+  virtual void enterOutputStmt(bfeParser::OutputStmtContext *ctx) = 0;
+  virtual void exitOutputStmt(bfeParser::OutputStmtContext *ctx) = 0;
+
+
+};
+

lib/generated/bfeParser.h

@@ -0,0 +1,296 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+#pragma once
+
+
+#include "antlr4-runtime.h"
+
+
+
+
+class  bfeParser : public antlr4::Parser {
+public:
+  enum {
+    NEWLINE = 1, COMMENT = 2, ML_COMMENT = 3, DEF = 4, LOOPSTART = 5, LOOPEND = 6, 
+    GRPSTART = 7, GRPEND = 8, NUMBER = 9, INPUT = 10, OUTPUT = 11, DEC = 12, 
+    INC = 13, LEFT = 14, RIGHT = 15, EVERYTHING_ELSE = 16, WS = 17
+  };
+
+  enum {
+    RuleProgram = 0, RuleStatements = 1, RuleEligibleStmt = 2, RuleNumberedStmt = 3, 
+    RuleStmt = 4, RuleGroupedStmt = 5, RuleLoopStmt = 6, RuleBasicStmt = 7, 
+    RulePtrIncr = 8, RulePtrDecr = 9, RulePtrLeft = 10, RulePtrRight = 11, 
+    RuleInputStmt = 12, RuleOutputStmt = 13
+  };
+
+  bfeParser(antlr4::TokenStream *input);
+  ~bfeParser();
+
+  virtual std::string getGrammarFileName() const override;
+  virtual const antlr4::atn::ATN& getATN() const override { return _atn; };
+  virtual const std::vector<std::string>& getTokenNames() const override { return _tokenNames; }; // deprecated: use vocabulary instead.
+  virtual const std::vector<std::string>& getRuleNames() const override;
+  virtual antlr4::dfa::Vocabulary& getVocabulary() const override;
+
+
+  class ProgramContext;
+  class StatementsContext;
+  class EligibleStmtContext;
+  class NumberedStmtContext;
+  class StmtContext;
+  class GroupedStmtContext;
+  class LoopStmtContext;
+  class BasicStmtContext;
+  class PtrIncrContext;
+  class PtrDecrContext;
+  class PtrLeftContext;
+  class PtrRightContext;
+  class InputStmtContext;
+  class OutputStmtContext; 
+
+  class  ProgramContext : public antlr4::ParserRuleContext {
+  public:
+    ProgramContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *EOF();
+    StatementsContext *statements();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  ProgramContext* program();
+
+  class  StatementsContext : public antlr4::ParserRuleContext {
+  public:
+    StatementsContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    std::vector<EligibleStmtContext *> eligibleStmt();
+    EligibleStmtContext* eligibleStmt(size_t i);
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  StatementsContext* statements();
+
+  class  EligibleStmtContext : public antlr4::ParserRuleContext {
+  public:
+    EligibleStmtContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    StmtContext *stmt();
+    NumberedStmtContext *numberedStmt();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  EligibleStmtContext* eligibleStmt();
+
+  class  NumberedStmtContext : public antlr4::ParserRuleContext {
+  public:
+    NumberedStmtContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    StmtContext *stmt();
+    antlr4::tree::TerminalNode *NUMBER();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  NumberedStmtContext* numberedStmt();
+
+  class  StmtContext : public antlr4::ParserRuleContext {
+  public:
+    StmtContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    BasicStmtContext *basicStmt();
+    GroupedStmtContext *groupedStmt();
+    LoopStmtContext *loopStmt();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  StmtContext* stmt();
+
+  class  GroupedStmtContext : public antlr4::ParserRuleContext {
+  public:
+    GroupedStmtContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *GRPSTART();
+    StatementsContext *statements();
+    antlr4::tree::TerminalNode *GRPEND();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  GroupedStmtContext* groupedStmt();
+
+  class  LoopStmtContext : public antlr4::ParserRuleContext {
+  public:
+    LoopStmtContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *LOOPSTART();
+    StatementsContext *statements();
+    antlr4::tree::TerminalNode *LOOPEND();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  LoopStmtContext* loopStmt();
+
+  class  BasicStmtContext : public antlr4::ParserRuleContext {
+  public:
+    BasicStmtContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    PtrIncrContext *ptrIncr();
+    PtrDecrContext *ptrDecr();
+    PtrLeftContext *ptrLeft();
+    PtrRightContext *ptrRight();
+    InputStmtContext *inputStmt();
+    OutputStmtContext *outputStmt();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  BasicStmtContext* basicStmt();
+
+  class  PtrIncrContext : public antlr4::ParserRuleContext {
+  public:
+    PtrIncrContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *INC();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  PtrIncrContext* ptrIncr();
+
+  class  PtrDecrContext : public antlr4::ParserRuleContext {
+  public:
+    PtrDecrContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *DEC();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  PtrDecrContext* ptrDecr();
+
+  class  PtrLeftContext : public antlr4::ParserRuleContext {
+  public:
+    PtrLeftContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *LEFT();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  PtrLeftContext* ptrLeft();
+
+  class  PtrRightContext : public antlr4::ParserRuleContext {
+  public:
+    PtrRightContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *RIGHT();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  PtrRightContext* ptrRight();
+
+  class  InputStmtContext : public antlr4::ParserRuleContext {
+  public:
+    InputStmtContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *INPUT();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  InputStmtContext* inputStmt();
+
+  class  OutputStmtContext : public antlr4::ParserRuleContext {
+  public:
+    OutputStmtContext(antlr4::ParserRuleContext *parent, size_t invokingState);
+    virtual size_t getRuleIndex() const override;
+    antlr4::tree::TerminalNode *OUTPUT();
+
+    virtual void enterRule(antlr4::tree::ParseTreeListener *listener) override;
+    virtual void exitRule(antlr4::tree::ParseTreeListener *listener) override;
+
+    virtual antlrcpp::Any accept(antlr4::tree::ParseTreeVisitor *visitor) override;
+   
+  };
+
+  OutputStmtContext* outputStmt();
+
+
+private:
+  static std::vector<antlr4::dfa::DFA> _decisionToDFA;
+  static antlr4::atn::PredictionContextCache _sharedContextCache;
+  static std::vector<std::string> _ruleNames;
+  static std::vector<std::string> _tokenNames;
+
+  static std::vector<std::string> _literalNames;
+  static std::vector<std::string> _symbolicNames;
+  static antlr4::dfa::Vocabulary _vocabulary;
+  static antlr4::atn::ATN _atn;
+  static std::vector<uint16_t> _serializedATN;
+
+
+  struct Initializer {
+    Initializer();
+  };
+  static Initializer _init;
+};
+

lib/generated/bfeVisitor.cpp

@@ -0,0 +1,7 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+
+#include "bfeVisitor.h"
+
+

lib/generated/bfeVisitor.h

@@ -0,0 +1,52 @@
+
+// Generated from /home/atreya/Documents/Projects/Miscellaneous/bfc/grammar/bfe.g4 by ANTLR 4.8
+
+#pragma once
+
+
+#include "antlr4-runtime.h"
+#include "bfeParser.h"
+
+
+
+/**
+ * This class defines an abstract visitor for a parse tree
+ * produced by bfeParser.
+ */
+class  bfeVisitor : public antlr4::tree::AbstractParseTreeVisitor {
+public:
+
+  /**
+   * Visit parse trees produced by bfeParser.
+   */
+    virtual antlrcpp::Any visitProgram(bfeParser::ProgramContext *context) = 0;
+
+    virtual antlrcpp::Any visitStatements(bfeParser::StatementsContext *context) = 0;
+
+    virtual antlrcpp::Any visitEligibleStmt(bfeParser::EligibleStmtContext *context) = 0;
+
+    virtual antlrcpp::Any visitNumberedStmt(bfeParser::NumberedStmtContext *context) = 0;
+
+    virtual antlrcpp::Any visitStmt(bfeParser::StmtContext *context) = 0;
+
+    virtual antlrcpp::Any visitGroupedStmt(bfeParser::GroupedStmtContext *context) = 0;
+
+    virtual antlrcpp::Any visitLoopStmt(bfeParser::LoopStmtContext *context) = 0;
+
+    virtual antlrcpp::Any visitBasicStmt(bfeParser::BasicStmtContext *context) = 0;
+
+    virtual antlrcpp::Any visitPtrIncr(bfeParser::PtrIncrContext *context) = 0;
+
+    virtual antlrcpp::Any visitPtrDecr(bfeParser::PtrDecrContext *context) = 0;
+
+    virtual antlrcpp::Any visitPtrLeft(bfeParser::PtrLeftContext *context) = 0;
+
+    virtual antlrcpp::Any visitPtrRight(bfeParser::PtrRightContext *context) = 0;
+
+    virtual antlrcpp::Any visitInputStmt(bfeParser::InputStmtContext *context) = 0;
+
+    virtual antlrcpp::Any visitOutputStmt(bfeParser::OutputStmtContext *context) = 0;
+
+
+};
+

samples/bfc.bfe

@@ -0,0 +1 @@
+(+97>)3<3+>+5>+2<2(.>)3

samples/error.bfe

@@ -0,0 +1 @@
++65.<

samples/test.bfe

@@ -0,0 +1,48 @@
+>,<>>,>,<[->-               
+                                  >+<><<]+->>[-<<+>>]            
+                                <+-><><<<[-+->-<+-<+>]<          
+                               [->+<]><>>>>>><>++->>+->>         
+                              >>>+[>><>>>[-]<[-<>-+]<<>[-        
+                             +-]-++-+-<         [-]<><<>[+       
+                            ---+]<><<             <<+-<<<<>      
+                           -+<><<<>                 <+-<<[->     
+                          >>>>>>+                     >>>>>-+    
+                         >+<<<><            <          <><<<<<   
+                        <<<<]>[           ->>           >>><><>  
+                       ><>>+>>          >>>>+            <<<<<>< 
+                      <<<<+-<           <<<]>             [->>>>>
+                                        >><>+                    
+                                        >>>>-                    
+                                        +><>>                    
+                                        +<<<<                    
+                                        <<+-<                    
+         <<<><<<<        -+><]     >>-++-+>+-+[<-]      <[->>    
+      <>++-<<<]>>>>      [-<<<     +--+<<<<+>><>>>      >>>]>    
+     [-<<-+<<<<<+<>>     +->>>     >>>]>[-<<<<><<<      ><<+>    
+    >>>>>>]>>>>>><>>+    [-<<<     <+--+<><+-<<<<<      <[->>    
+   +>>+<<<<]+->[->>+>>   +-+<<     <<]>[-<<+>>]>[-      <<+>>    
+  ]+[[<>-]-++>[<-]<+-[   +--><     >><>-<<<]>>-+->      >>+>[    
+ <-]<+-[-       >+>[-    <-]<[          >>[-<           <-+->    
+ ]-<<[->         ><-     >+->-          +-<<<           <]]<]    
+ >>-<<<           <      <+>[>          <<-]<           [>+->    
+[-+<<-                   >]<<[          <]]>-           +-]>>    
+>>><>>                   >><>+          ]-<<<           >+-<<    
+<>+>-                    ++[<-          ]<[-+           >>+[<    
+<<>->                    -+]<<          [>>>+           [<-+<    
+<->>]                    <<<[<          ]]]>-           ]>>>>    
+[-]<<                    <<<<<          -+<><           <<<<<    
+<[-]>                    >+>+[          <-]<[           ->>+<    
+><<<]                    >+>[<          -]<[>           >[<<-    
+>]<<[                    <]]>-          [+>>>           >>>><    
+++-++                    +++++          ++<<<           <<<+>    
++-[<<>                   -]<[>          >[<<-           >]<<[    
+<]]>-[                   ++>[<          -]<[-           >>-<<    
+ <]>>->           >      +>>+>          -[<-]           <[<<[    
+ ->>>+<<         ><<     ]+->>          >>>+>           +[<><    
+ -]<><[->       >+<<<    ]<<-<          ]<<<<           +>[<-    
+  ]<[>>[<<->]<<[<]]>-]   >>+++          +++++[   ->     +++++    
+   +<]>[-<<<<+>>>>]>>>   >>+><          >-+[<-]<[>>     [<<->    
+    ]<<[<]]>-[++>[<-]    <[->>          -<<<]>>-<<<     <<<<<    
+     +>+[<-]<[->>+<<     <]>>>          >>>>>+>[<-      ]<[>>    
+      [<<->]<<[<]]>      -]<<[           -]<<<<<+>      [<-]<    
+         [>>[<<->        ]<<[<            ]]>-]<<       [.<]

samples/testmem.bfe

@@ -0,0 +1 @@
+(+65.>)65536

src/executeBFE.cpp

@@ -20,9 +20,6 @@ Any executeBGE::visitNumberedStmt(bfeParser::NumberedStmtContext *ctx){
 }
 
 Any executeBGE::visitPtrIncr(bfeParser::PtrIncrContext *ctx){
-    if(memory.size()<pointer){
-        memory.push_back(0);
-    }
     memory[pointer]++;
     return Any();
 }
@@ -33,12 +30,23 @@ Any executeBGE::visitPtrDecr(bfeParser::PtrDecrContext *ctx){
 }
 
 Any executeBGE::visitPtrRight(bfeParser::PtrRightContext *ctx){
+    // too much -> throw this program out
+    if(memory.max_size()==memory.size()){
+        throw (std::string("Max Size Reached ")+to_string(memory.capacity()));
+    }
+    // its about to be incremented -> need to increase
+    if(memory.size()==pointer+1){
+        memory.push_back(0);
+    }
     pointer++;
     return Any();
 }
 
 Any executeBGE::visitPtrLeft(bfeParser::PtrLeftContext *ctx){
-    if(pointer==0) throw std::string("Decrement below zero");
+    
+    if(pointer==0){
+        throw std::string("Decrement below zero");
+    }
     pointer--;
     return Any();
 }

src/main.cpp

@@ -1,39 +1,93 @@
 #include <iostream>
 #include <vector>
 #include <string>
-#include <antlr4-common.h>
+#include <cxxopts.hpp>
+#include "antlr4-common.h"
+#include "cxxopts.hpp"
 #include "bfeLexer.h"
 #include "bfeParser.h"
 #include "toBFListener.hpp"
+#include "toCPPListener.hpp"
 #include "executeBFE.hpp"
 
-
 using namespace antlr4;
 
-int main(int argc, const char *argv[])
+int main(int argc, char **argv)
 {
-    std::ifstream stream;
-    bool outFile = false;
-    stream.open(argv[1]);
-    if (stream.fail())
-    {
-        std::cout << "Could not open" << std::endl;
-        return 1;
-    }
-    ANTLRInputStream input(stream);
-    bfeLexer lexer(&input);
-    CommonTokenStream tokens(&lexer);
-    bfeParser parser(&tokens);
+    cxxopts::Options options(argv[0], "An interpreter/translator for bfe");
 
-    tree::ParseTree *tree = parser.program();
-    // toBFListener listener;
-    // tree::ParseTreeWalker::DEFAULT.walk(&listener, tree);
-    executeBGE* visitor = new executeBGE();
-    try{
-        visitor->visit(tree);
-        std::cout<<std::endl;
-    }catch(std::string e){
-        std::cout<<"Illegal:"<<e<<std::endl;
+    options.add_options()
+    ("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"});
+    // try
+    {
+        auto results = options.parse(argc, argv);
+        std::string action = results["action"].as<std::string>();
+        if (action.compare("exec") && action.compare("bf") && action.compare("cpp"))
+        {
+            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;
+        }
     }
+    // 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);
+}