Update environment

.gitignore

@@ -3,3 +3,5 @@
 .direnv
 cmake-build-debug
 cmake-build-release
+.cache/clangd/index
+result

CMakeLists.txt

@@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 3.25)
 project(BrainfuckInterpreter)
 
 set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 # find_package(Boost 1.81 COMPONENTS program_options REQUIRED)
 
@@ -10,6 +11,7 @@ include_directories(include)
 add_executable(bfuck
     src/main.cpp
     src/lex.cpp
+    src/interpret.cpp
 )
 
 # target_link_libraries(lasm Boost::program_options)

HelloWorld.bf

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

HelloWorld.bfuck

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

compile_commands.json

@@ -0,0 +1 @@
+./cmake-build-release/compile_commands.json

flake.lock

@@ -1,52 +1,15 @@
 {
   "nodes": {
-    "devshell": {
-      "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs"
-      },
-      "locked": {
-        "lastModified": 1705332421,
-        "narHash": "sha256-USpGLPme1IuqG78JNqSaRabilwkCyHmVWY0M9vYyqEA=",
-        "owner": "numtide",
-        "repo": "devshell",
-        "rev": "83cb93d6d063ad290beee669f4badf9914cc16ec",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "devshell",
-        "type": "github"
-      }
-    },
     "flake-utils": {
       "inputs": {
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1701680307,
-        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flake-utils_2": {
-      "inputs": {
-        "systems": "systems_2"
-      },
-      "locked": {
-        "lastModified": 1705309234,
-        "narHash": "sha256-uNRRNRKmJyCRC/8y1RqBkqWBLM034y4qN7EprSdmgyA=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "1ef2e671c3b0c19053962c07dbda38332dcebf26",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
         "type": "github"
       },
       "original": {
@@ -57,59 +20,46 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1704161960,
-        "narHash": "sha256-QGua89Pmq+FBAro8NriTuoO/wNaUtugt29/qqA8zeeM=",
+        "lastModified": 1751180975,
+        "narHash": "sha256-BKk4yDiXr4LdF80OTVqYJ53Q74rOcA/82EClXug8xsY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "63143ac2c9186be6d9da6035fa22620018c85932",
+        "rev": "a48741b083d4f36dd79abd9f760c84da6b4dc0e5",
         "type": "github"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_2": {
-      "locked": {
-        "lastModified": 1705566941,
-        "narHash": "sha256-CLNtVRDA8eUPk+bxsCCZtRO0Cp+SpHdn1nNOLoFypLs=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "b06ff4bf8f4ad900fe0c2a61fc2946edc3a84be7",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixpkgs-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
+        "id": "nixpkgs",
+        "type": "indirect"
       }
     },
     "root": {
       "inputs": {
-        "devshell": "devshell",
-        "flake-utils": "flake-utils_2",
-        "nixpkgs": "nixpkgs_2"
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
       }
     },
-    "systems": {
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
       "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "lastModified": 1751251399,
+        "narHash": "sha256-y+viCuy/eKKpkX1K2gDvXIJI/yzvy6zA3HObapz9XZ0=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "b22d5ee8c60ed1291521f2dde48784edd6bf695b",
         "type": "github"
       },
       "original": {
-        "owner": "nix-systems",
-        "repo": "default",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
         "type": "github"
       }
     },
-    "systems_2": {
+    "systems": {
       "locked": {
         "lastModified": 1681028828,
         "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",

flake.nix

@@ -1,86 +1,246 @@
-{
-  description = "C/C++ Environment";
+rec {
+  description = "C++ Brainfuck Interpreter";
 
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
-  inputs.flake-utils.url = "github:numtide/flake-utils";
-  inputs.devshell.url = "github:numtide/devshell";
+  inputs = {
+    nixpkgs.url = "nixpkgs"; # Use nixpkgs from system registry
+    flake-utils.url = "github:numtide/flake-utils";
+
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
+  };
 
   outputs = {
     self,
     nixpkgs,
     flake-utils,
-    devshell,
+    rust-overlay,
   }:
+  # Create a shell (and possibly package) for each possible system, not only x86_64-linux
     flake-utils.lib.eachDefaultSystem (system: let
       pkgs = import nixpkgs {
         inherit system;
-        config.allowUnfree = true; # For clion
-        overlays = [devshell.overlays.default];
+        config.allowUnfree = true;
+        overlays = [
+          rust-overlay.overlays.default
+        ];
+      };
+      inherit (pkgs) lib stdenv;
+
+      # ===========================================================================================
+      # Define custom dependencies
+      # ===========================================================================================
+
+      python = pkgs.python313.withPackages (p:
+        with p; [
+          pyside6
+          ffmpeg-python
+          matplotlib
+          numpy
+        ]);
+
+      rust = pkgs.rust-bin.stable.latest.default.override {
+        extensions = ["rust-src"]; # Include the Rust stdlib source (for IntelliJ)
       };
 
-      # NOTE: Usual 64 bit compilers that don't collide
+      # 64 bit C/C++ compilers that don't collide (use the same libc)
       bintools = pkgs.wrapBintoolsWith {
-        bintools = pkgs.bintools.bintools;
+        bintools = pkgs.bintools.bintools; # Unwrapped bintools
         libc = pkgs.glibc;
       };
-      gcc13 = pkgs.hiPrio (pkgs.wrapCCWith {
-        cc = pkgs.gcc13.cc;
+      gcc = pkgs.hiPrio (pkgs.wrapCCWith {
+        cc = pkgs.gcc.cc; # Unwrapped gcc
         libc = pkgs.glibc;
         bintools = bintools;
       });
-      clang16 = pkgs.wrapCCWith {
-        cc = pkgs.clang_16.cc;
+      clang = pkgs.wrapCCWith {
+        cc = pkgs.clang.cc; # Unwrapped clang
         libc = pkgs.glibc;
         bintools = bintools;
       };
 
-      # NOTE: Multilib compilers that don't collide
-      bintools_multi = pkgs.wrapBintoolsWith {
-        bintools = pkgs.bintools.bintools; # Get the unwrapped bintools from the wrapper
+      # Multilib C/C++ compilers that don't collide (use the same libc)
+      bintools_multilib = pkgs.wrapBintoolsWith {
+        bintools = pkgs.bintools.bintools; # Unwrapped bintools
         libc = pkgs.glibc_multi;
       };
-      gcc13_multi = pkgs.hiPrio (pkgs.wrapCCWith {
-        cc = pkgs.gcc13.cc; # Get the unwrapped gcc from the wrapper
+      gcc_multilib = pkgs.hiPrio (pkgs.wrapCCWith {
+        cc = pkgs.gcc.cc; # Unwrapped gcc
         libc = pkgs.glibc_multi;
-        bintools = bintools_multi;
+        bintools = bintools_multilib;
       });
-      clang16_multi = pkgs.wrapCCWith {
-        cc = pkgs.clang_16.cc;
+      clang_multilib = pkgs.wrapCCWith {
+        cc = pkgs.clang.cc; # Unwrapped clang
         libc = pkgs.glibc_multi;
-        bintools = bintools_multi;
+        bintools = bintools_multilib;
       };
-    in {
-      # devShell = pkgs.devshell.mkShell ...
-      devShell = pkgs.devshell.mkShell {
-        name = "C/C++ Environment";
 
-        packages = with pkgs; [
-          # Compilers
+      # ===========================================================================================
+      # Specify dependencies
+      # https://nixos.org/manual/nixpkgs/stable/#ssec-stdenv-dependencies-overview
+      # Just for a "nix develop" shell, buildInputs can be used for everything.
+      # ===========================================================================================
+
+      # Add dependencies to nativeBuildInputs if they are executed during the build:
+      # - Those which are needed on $PATH during the build, for example cmake and pkg-config
+      # - Setup hooks, for example makeWrapper
+      # - Interpreters needed by patchShebangs for build scripts (with the --build flag), which can be the case for e.g. perl
+      nativeBuildInputs = with pkgs; [
+        # Languages:
+        # python
+        # rust
         bintools
-          gcc13
-          clang16
-          # bintools_multi
-          # gcc13_multi
-          # clang15_multi
+        gcc
+        clang
+        # bintools_multilib
+        # gcc_multilib
+        # clang_multilib
 
-          # Native buildinputs
+        # C/C++:
+        gdb
+        valgrind
         gnumake
         cmake
-          # nasm
+        # pkg-config
 
-          # Development
-          # bear # To generate compilation database
-          gdb
-          cling # To try out my bullshit implementations
-          # doxygen # Generate docs + graphs
+        # Qt:
+        # qt6.wrapQtAppsHook # For the shellHook
       ];
 
-        commands = [
-          # {
-          #   name = "ide";
-          #   help = "Run clion for project";
-          #   command = "clion &>/dev/null ./ &";
-          # }
+      # Add dependencies to buildInputs if they will end up copied or linked into the final output or otherwise used at runtime:
+      # - Libraries used by compilers, for example zlib
+      # - Interpreters needed by patchShebangs for scripts which are installed, which can be the case for e.g. perl
+      buildInputs = with pkgs; [
+        # C/C++:
+        # boost
+        # sfml
+
+        # Qt:
+        # qt6.qtbase
+        # qt6.full
+      ];
+
+      # ===========================================================================================
+      # Define buildable + installable packages
+      # ===========================================================================================
+
+      package = stdenv.mkDerivation {
+        inherit nativeBuildInputs buildInputs;
+        pname = "bfuck";
+        version = "1.0.0";
+        src = ./.;
+
+        installPhase = ''
+          mkdir -p $out/bin
+          mv ./bfuck $out/bin
+        '';
+      };
+    in rec {
+      # Provide package for "nix build"
+      defaultPackage = package;
+      defaultApp = flake-utils.lib.mkApp {
+        drv = defaultPackage;
+      };
+
+      # Provide environment for "nix develop"
+      devShell = pkgs.mkShell {
+        inherit nativeBuildInputs buildInputs;
+        name = description;
+
+        # =========================================================================================
+        # Define environment variables
+        # =========================================================================================
+
+        # Rust stdlib source:
+        # RUST_SRC_PATH = "${rust}/lib/rustlib/src/rust/library";
+
+        # Custom dynamic libraries:
+        # LD_LIBRARY_PATH = builtins.concatStringsSep ":" [
+        #   # Rust Bevy GUI app
+        #   "${pkgs.xorg.libX11}/lib"
+        #   "${pkgs.xorg.libXcursor}/lib"
+        #   "${pkgs.xorg.libXrandr}/lib"
+        #   "${pkgs.xorg.libXi}/lib"
+        #   "${pkgs.libGL}/lib"
+        # ];
+
+        # Dynamic libraries from buildinputs:
+        # LD_LIBRARY_PATH = nixpkgs.lib.makeLibraryPath buildInputs;
+
+        # =========================================================================================
+        # Define shell environment
+        # =========================================================================================
+
+        # Setup the shell when entering the "nix develop" environment (bash script).
+        shellHook = let
+          mkCmakeScript = type: let
+            typeLower = lib.toLower type;
+          in
+            pkgs.writers.writeFish "cmake-${typeLower}.fish" ''
+              cd $FLAKE_PROJECT_ROOT
+
+              echo "Removing build directory ./cmake-build-${typeLower}/"
+              rm -rf ./cmake-build-${typeLower}
+
+              echo "Creating build directory"
+              mkdir cmake-build-${typeLower}
+              cd cmake-build-${typeLower}
+
+              echo "Running cmake"
+              cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE="${type}" -DCMAKE_EXPORT_COMPILE_COMMANDS="On" ..
+
+              echo "Linking compile_commands.json"
+              cd ..
+              ln -sf ./cmake-build-${typeLower}/compile_commands.json ./compile_commands.json
+            '';
+
+          cmakeDebug = mkCmakeScript "Debug";
+          cmakeRelease = mkCmakeScript "Release";
+
+          mkBuildScript = type: let
+            typeLower = lib.toLower type;
+          in
+            pkgs.writers.writeFish "cmake-build.fish" ''
+              cd $FLAKE_PROJECT_ROOT/cmake-build-${typeLower}
+
+              echo "Running cmake"
+              cmake --build .
+            '';
+
+          buildDebug = mkBuildScript "Debug";
+          buildRelease = mkBuildScript "Release";
+
+          # Use this to specify commands that should be ran after entering fish shell
+          initProjectShell = pkgs.writers.writeFish "init-shell.fish" ''
+            echo "Entering \"${description}\" environment..."
+
+            # Determine the project root, used e.g. in cmake scripts
+            set -g -x FLAKE_PROJECT_ROOT (git rev-parse --show-toplevel)
+
+            # Build the provided NixOS package
+            abbr -a build "nix build -L"
+
+            # Rust Bevy:
+            # abbr -a build-release-windows "CARGO_FEATURE_PURE=1 cargo xwin build --release --target x86_64-pc-windows-msvc"
+
+            # C/C++:
+            abbr -a cmake-debug "${cmakeDebug}"
+            abbr -a cmake-release "${cmakeRelease}"
+            abbr -a build-debug "${buildDebug}"
+            abbr -a build-release "${buildRelease}"
+          '';
+        in
+          builtins.concatStringsSep "\n" [
+            # Launch into pure fish shell
+            ''
+              exec "$(type -p fish)" -C "source ${initProjectShell} && abbr -a menu '${pkgs.bat}/bin/bat "${initProjectShell}"'"
+            ''
+
+            # Qt: Launch into wrapped fish shell
+            # ''
+            #   fishdir=$(mktemp -d)
+            #   makeWrapper "$(type -p fish)" "$fishdir/fish" "''${qtWrapperArgs[@]}"
+            #   exec "$fishdir/fish" -C "source ${initProjectShell} && abbr -a menu '${pkgs.bat}/bin/bat "${initProjectShell}"'"
+            # ''
           ];
       };
     });

include/interpret.hpp

@@ -0,0 +1,53 @@
+#ifndef __INTERPRET_H_
+#define __INTERPRET_H_
+
+#include <cstdint>
+#include <vector>
+#include <string>
+#include <memory>
+#include <map>
+#include <functional>
+
+/**
+ * @brief Interpreter for a BrainFuck program
+ */
+class Interpreter {
+private:
+    const std::map<char, std::function<void(Interpreter *)>> instruction_map = {
+        {'>', &Interpreter::_increment_pointer},
+        {'<', &Interpreter::_decrement_pointer},
+        {'+', &Interpreter::_increment_value},
+        {'-', &Interpreter::_decrement_value},
+        {'.', &Interpreter::_print_value},
+        {',', &Interpreter::_read_value},
+        {'[', &Interpreter::_jump_forward_if_zero},
+        {']', &Interpreter::_jump_backward_if_nonzero},
+    };
+
+    // Runtime VM
+    bool running;
+    const std::string program;
+    uint32_t program_counter;
+    uint32_t pointer;
+    std::vector<uint8_t> memory;
+
+    // These functions implement the BrainFuck statements
+    auto _increment_pointer() -> void;     // >
+    auto _decrement_pointer() -> void;     // <
+    auto _increment_value() -> void;       // +
+    auto _decrement_value() -> void;       // -
+    auto _print_value() -> void;           // .
+    auto _read_value() -> void;            // ,
+    auto _jump_forward_if_zero() -> void;  // [
+    auto _jump_backward_if_nonzero() -> void; // ]
+
+public:
+    explicit Interpreter(std::string_view program);
+
+    // These functions control the interpreter flow
+    auto abort() -> void;
+    auto step() -> void;
+    auto run() -> void;
+};
+
+#endif

include/lex.hpp

@@ -11,6 +11,6 @@
  */
 bool lex_brainfuck_file(const std::string &path, std::string &tokens);
 
-bool token_string_valid(std::string_view tokens);
+bool program_valid(const std::string_view tokens);
 
 #endif

src/interpret.cpp

@@ -0,0 +1,153 @@
+#include "interpret.hpp"
+
+#include <iostream>
+#include <limits>
+
+//
+// Private functions
+//
+
+static const constexpr uint8_t MIN_VALUE = static_cast<uint8_t>(0);
+static const constexpr uint8_t MAX_VALUE = static_cast<uint8_t>(-1);
+
+auto Interpreter::_increment_pointer() -> void {
+    if (pointer == std::numeric_limits<uint32_t>::max()) {
+        std::cout << "Can't increment pointer: Max size reached!" << std::endl;
+        abort();
+        return;
+    }
+
+    pointer++;
+
+    // If our currently allocated memory is exceeded, double it
+    if (pointer == memory.size()) {
+        memory.resize(memory.size() * 2, MIN_VALUE);
+    }
+}
+
+auto Interpreter::_decrement_pointer() -> void {
+    if (pointer == 0) {
+        std::cout << "Can't decrement pointer: Min size reached!" << std::endl;
+        abort();
+        return;
+    }
+
+    pointer--;
+}
+
+auto Interpreter::_increment_value() -> void {
+    if (memory[pointer] == MAX_VALUE) {
+        std::cout << "Can't increment value: Max value reached!" << std::endl;
+        abort();
+        return;
+    }
+
+    memory[pointer]++;
+}
+
+auto Interpreter::_decrement_value() -> void {
+    if (memory[pointer] == MIN_VALUE) {
+        std::cout << "Can't decrement value: Min value reached!" << std::endl;
+        abort();
+        return;
+    }
+
+    memory[pointer]--;
+}
+
+auto Interpreter::_print_value() -> void {
+    std::cout << static_cast<uint8_t>(memory[pointer]) << std::endl;
+}
+
+auto Interpreter::_read_value() -> void {
+    char input;
+    std::cin.get(input);
+
+    if (static_cast<uint8_t>(input) < MIN_VALUE || static_cast<uint8_t>(input) > MAX_VALUE) {
+        std::cout << "Invalid input! Must be element of ["
+                  << MIN_VALUE << ", " << MAX_VALUE
+                  << "]!" << std::endl;
+        abort();
+        return;
+    }
+
+    memory[pointer] = static_cast<uint8_t>(input);
+}
+
+auto Interpreter::_jump_forward_if_zero() -> void {
+    if (memory[pointer] != MIN_VALUE) {
+        return;
+    }
+
+    // Find the corresponding ']'
+    int32_t jump_counter = 0;
+    for (uint32_t index = program_counter; index < program.size(); ++index) {
+        if (program[index] == '[') {
+            ++jump_counter;
+        } else if (program[index] == ']') {
+            --jump_counter;
+        }
+
+        if (jump_counter == 0) {
+            program_counter = index; // PC gets incremented later
+            return;
+        }
+    }
+}
+
+auto Interpreter::_jump_backward_if_nonzero() -> void {
+    if (memory[pointer] == MIN_VALUE) {
+        return;
+    }
+
+    // Find the corresponding '['
+    int32_t jump_counter = 0;
+    for (uint32_t index = program_counter; index > 0; --index) {
+        if (program[index] == '[') {
+            ++jump_counter;
+        } else if (program[index] == ']') {
+            --jump_counter;
+        }
+
+        if (jump_counter == 0) {
+            program_counter = index; // PC gets incremented later
+            return;
+        }
+    }
+}
+
+//
+// Public functions
+//
+
+Interpreter::Interpreter(const std::string_view program)
+    : running(false), program(program), program_counter(0), pointer(0), memory(1024, MIN_VALUE) {
+    std::cout << "Initialized interpreter with program size " << program.size() << "!\n" << std::endl;
+}
+
+auto Interpreter::abort() -> void {
+    running = false;
+    std::cout << "Program aborted!" << std::endl;
+}
+
+auto Interpreter::step() -> void {
+    if (program_counter == program.size()) {
+        std::cout << "Program finished!" << std::endl;
+        running = false;
+        return;
+    }
+
+    const char instruction = program[program_counter];
+
+    // Execute the correct action in the VM
+    instruction_map.at(instruction)(this);
+
+    ++program_counter;
+}
+
+auto Interpreter::run() -> void {
+    running = true;
+    while (running) {
+        step();
+    }
+}

src/lex.cpp

@@ -3,6 +3,7 @@
 #include <iostream>
 #include <fstream>
 #include <algorithm>
+#include <stack>
 
 bool lex_brainfuck_file(const std::string &path, std::string &tokens) {
     if (!tokens.empty()) {
@@ -29,19 +30,35 @@ bool lex_brainfuck_file(const std::string &path, std::string &tokens) {
     }
     input_stream.close();
 
-    if (!token_string_valid(tokens)) {
+    if (!program_valid(tokens)) {
         std::cout << "Program is invalid!" << std::endl;
         return false;
     }
 
-    std::cout << "Lexed BrainFuck program:\n" << tokens << std::endl;
+    std::cout << "Lexed valid BrainFuck program:\n" << tokens << std::endl;
     return true;
 }
 
-bool token_string_valid(const std::string_view tokens) {
+bool program_valid(const std::string_view tokens) {
+    // Check tokens
     std::string valid_tokens = "><+-.,[]";
-
-    return std::ranges::all_of(tokens.begin(), tokens.end(), [&valid_tokens](const char c){
+    bool tokens_valid = std::ranges::all_of(tokens.begin(), tokens.end(), [&valid_tokens](const char c){
         return valid_tokens.find(c) != std::string::npos;
     });
+
+    // Check bracket balance
+    std::stack<char> brackets;
+    for (const char c : tokens) {
+        if (c == '[') {
+            brackets.push('[');
+        } else if (c == ']') {
+            if (brackets.top() == '[') {
+                brackets.pop();
+            } else {
+                return false;
+            }
+        }
+    }
+
+    return tokens_valid && brackets.empty();
 }

src/main.cpp

@@ -1,4 +1,5 @@
 #include "lex.hpp"
+#include "interpret.hpp"
 
 #include <iostream>
 
@@ -9,7 +10,12 @@ int main(int argc, char **argv) {
     std::cout << "Running " << argv[1] << "...\n" << std::endl;
 
     std::string tokens;
-    lex_brainfuck_file(argv[1], tokens);
+    if (!lex_brainfuck_file(argv[1], tokens)) {
+        return 1;
+    }
+
+    Interpreter interpreter(tokens);
+    interpreter.run();
 
     return 0;
 }