The simplest shell program for v8 javascript engine

v8_simple_shell.cpp

#include <iostream>
#include <sstream>
#include <v8.h>

using namespace v8;

int main(int argc, const char **argv) {
  // Create a scope and environment
  HandleScope scope;
  Handle<Context> context = Context::New();
  Context::Scope context_scope(context);

  // Reading a source code
  std::stringbuf buffer;
  std::cin.get(buffer, EOF);
  Handle<String> source = String::New(buffer.str().c_str());

  // Register try/cache handler for error reporting
  TryCatch try_catch;
  // Compile the source code.
  Handle<Script> script = Script::Compile(source);

  if (script.IsEmpty()) {
    // Print errors that happened during compilation.
    String::AsciiValue error(try_catch.Exception());
    std::cout << *error << std::endl;
    return -1;
  }

  // Running script
  Handle<Value> result = script->Run();

  if (result.IsEmpty()) {
    // Print errors that happened during execution.
    String::AsciiValue error(try_catch.Exception());
    std::cout << *error << std::endl;
    return -1;
  }

  // Convert the result to an ASCII string and print it.
  String::AsciiValue ascii(result);
  std::cout << *ascii << std::endl;
  return 0;
}