JManip.cc

Go to the documentation of this file.

#include <string>
#include <iostream>
#include <sstream>
#include <iomanip>
#include <vector>

#include "JLang/JManip.hh"

#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"

namespace {

  struct A {

    A(const double value) : value(value) {}

    friend inline std::ostream& operator<<(std::ostream& out, const A& object)
    {
       const JFormat format(out, getFormat<A>(JFormat_t(5, 2, std::ios::fixed | std::ios::showpos)));

       return out << format << object.value;
    }
    
    double value;
  };

  struct B {

    B(const double value) : value(value) {}

    friend inline std::ostream& operator<<(std::ostream& out, const B& object)
    {
       const JFormat format(out, getFormat<B>(JFormat_t(12, 3, std::ios::scientific | std::ios::showpos)));

       return out << format << object.value;
    }
    
    double value;
  };

  struct C {

    friend inline std::ostream& operator<<(std::ostream& out, const C& object)
    {
      using namespace JPP;

      switch (getPrintOption(out)) {

      case SHORT_PRINT:
        return out << "C::shortprint";

      case MEDIUM_PRINT:
        return out << "C::mediumprint";

      case LONG_PRINT:
        return out << "C::longprint";

      default:
        return out << "C::undefined";
      }
    }
  };

  inline void print(std::ostream& out, const JFormat_t& format)
  {
    out << "(" << format.width << "," << format.precision << ")";
  }
}


/**
 * \file
 * Example program to test I/O manipulators.
 * \author mdejong
 */
int main(int argc, char* argv[])
{
  using namespace std;
  using namespace JPP;

  int     debug;

  try {

    JParser<> zap;

    zap['d'] = make_field(debug)           = 1;

    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }

  for (int value = 1; value < 1000000000; value *= 10) {
    cout << "CENTER <" << CENTER(12)   << value << ">" << endl;
  }

  for (int value = 1; value < 1000000000; value *= 10) {
    cout << "FILL   <" << FILL(12,'.') << value << ">" << FILL() << endl;
  }

  for (int value = 1; value < 1000000000; value *= 10) {
    cout << "RIGHT  <" << RIGHT(12)    << value << ">" << endl;
  }

  for (int value = 1; value < 1000000000; value *= 10) {
    cout << "LEFT   <" << LEFT(12)     << value << ">" << endl;
  }

  for (double value = 0.123456; value < 100000; value *= 10) {
    cout << "FIXED  <" << FIXED(12,6)  << value << ">" << endl;
  }


  {
    const double c = 12.34;

    const A a(c);
    const B b(c);

    cout << setprecision(3);

    cout << "A <" << a << ">" << endl;
    cout << "c <" << c << ">" << endl;
    cout << "B <" << b << ">" << endl;
    cout << "c <" << c << ">" << endl;

    setFormat<A>(JFormat_t(12, 3, std::ios::scientific));
    setFormat<B>(JFormat_t( 5, 2, std::ios::fixed));

    cout << "A <" << a << ">" << endl;
    cout << "c <" << c << ">" << endl;
    cout << "B <" << b << ">" << endl;
    cout << "c <" << c << ">" << endl;
  }
  {
    C c;

    cout << shortprint  << c << endl;
    cout << mediumprint << c << endl;
    cout << longprint   << c << endl;
  }
  {
    ostringstream os[2];
    
    const int i = 123456;
    
    os[0] << setw(12) << left << i;
    os[1] << LEFT(12) << i;

    ASSERT(os[0].str() == os[1].str(), "<" << os[0].str() << "> == <" << os[1].str() << ">");
  }
  {
    ostringstream os[2];
    
    const int i = 123456;
    
    os[0] << setw(12) << right << i;
    os[1] << RIGHT(12) << i;

    ASSERT(os[0].str() == os[1].str(), "<" << os[0].str() << "> == <" << os[1].str() << ">");
  }
  {
    ostringstream os[2];
    
    const int i = 123456;
    
    os[0] << setw(12) << setfill('0') << i;
    os[1] << FILL(12, '0') << i;

    ASSERT(os[0].str() == os[1].str(), "<" << os[0].str() << "> == <" << os[1].str() << ">");
  }
  {
    ostringstream os[2];
    
    const double x = 123.456;
    
    os[0] << setw(12) << setprecision(5) << fixed << x;
    os[1] << FIXED(12,5) << x;

    ASSERT(os[0].str() == os[1].str(), "<" << os[0].str() << "> == <" << os[1].str() << ">");
  }
  {
    ostringstream os[2];
    
    const double x = 123.456;
    
    os[0] << setw(12) << setprecision(2) << scientific << x;
    os[1] << SCIENTIFIC(12,2) << x;

    ASSERT(os[0].str() == os[1].str(), "<" << os[0].str() << "> == <" << os[1].str() << ">");
  }

  {
    vector<int> V = { 1, 2, 3, 4};

    cout << LAMBDA([v = V](ostream& out) { for (const auto& i : v) { out << " " << i; } }) << endl;
  }

  return 0;
}