tests/extend_output.test.cpp

• View this file on GitHub
• Last update: 2025-01-25 08:45:50+09:00

Depends on

• Assertion macro (tools/assert_that.hpp)
• Extend operator<< (tools/extend_output.hpp)
• Check whether T has the member function mod() (tools/has_mod.hpp)

Code

// competitive-verifier: STANDALONE

#include <array>
#include <iostream>
#include <map>
#include <optional>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <tuple>
#include <unordered_set>
#include <unordered_map>
#include <utility>
#include <vector>
#include "atcoder/modint.hpp"
#include "tools/assert_that.hpp"
#include "tools/extend_output.hpp"

using mint = atcoder::modint998244353;

int main() {
  std::cin.tie(nullptr);
  std::ios_base::sync_with_stdio(false);

  {
    std::array<int, 3> v = {123, 456, 789};
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
  }

  {
    std::map<int, int> v = {{{1, 123}, {2, 456}, {3, 789}}};
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[[1, 123], [2, 456], [3, 789]]");
  }

  {
    std::optional<int> v;
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "null");
  }
  {
    std::optional<int> v(123);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "123");
  }

  {
    std::pair<int, int> v(123, 456);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456]");
  }

  {
    std::queue<int> v;
    v.push(123);
    v.push(456);
    v.push(789);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
    assert_that(v.size() == 3);
    assert_that(v.front() == 123);
  }

  {
    std::set<int> v = {123, 456, 789};
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
  }

  {
    std::stack<int> v;
    v.push(123);
    v.push(456);
    v.push(789);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
    assert_that(v.size() == 3);
    assert_that(v.top() == 789);
  }

  {
    std::tuple<int, int, int> v(123, 456, 789);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
  }

  {
    std::unordered_set<int> v = {123, 456, 789};
    std::ostringstream oss;
    oss << v;
    assert_that(
      oss.str() == "[123, 456, 789]"
      || oss.str() == "[123, 789, 456]"
      || oss.str() == "[456, 123, 789]"
      || oss.str() == "[456, 789, 123]"
      || oss.str() == "[789, 123, 456]"
      || oss.str() == "[789, 456, 123]"
    );
  }

  {
    std::unordered_map<int, int> v = {{{1, 123}, {2, 456}, {3, 789}}};
    std::ostringstream oss;
    oss << v;
    assert_that(
      oss.str() == "[[1, 123], [2, 456], [3, 789]]"
      || oss.str() == "[[1, 123], [3, 789], [2, 456]]"
      || oss.str() == "[[2, 456], [1, 123], [3, 789]]"
      || oss.str() == "[[2, 456], [3, 789], [1, 123]]"
      || oss.str() == "[[3, 789], [1, 123], [2, 456]]"
      || oss.str() == "[[3, 789], [2, 456], [1, 123]]"
    );
  }

  {
    std::vector<int> v = {123, 456, 789};
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
  }

  {
    std::ostringstream oss;
    oss << mint(123);
    assert_that(oss.str() == "123");
  }

  return 0;
}

#line 1 "tests/extend_output.test.cpp"
// competitive-verifier: STANDALONE

#include <array>
#include <iostream>
#include <map>
#include <optional>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <tuple>
#include <unordered_set>
#include <unordered_map>
#include <utility>
#include <vector>
#line 1 "lib/ac-library/atcoder/modint.hpp"



#include <cassert>
#include <numeric>
#include <type_traits>

#ifdef _MSC_VER
#include <intrin.h>
#endif

#line 1 "lib/ac-library/atcoder/internal_math.hpp"



#line 5 "lib/ac-library/atcoder/internal_math.hpp"

#ifdef _MSC_VER
#include <intrin.h>
#endif

namespace atcoder {

namespace internal {

// @param m `1 <= m`
// @return x mod m
constexpr long long safe_mod(long long x, long long m) {
    x %= m;
    if (x < 0) x += m;
    return x;
}

// Fast modular multiplication by barrett reduction
// Reference: https://en.wikipedia.org/wiki/Barrett_reduction
// NOTE: reconsider after Ice Lake
struct barrett {
    unsigned int _m;
    unsigned long long im;

    // @param m `1 <= m`
    explicit barrett(unsigned int m) : _m(m), im((unsigned long long)(-1) / m + 1) {}

    // @return m
    unsigned int umod() const { return _m; }

    // @param a `0 <= a < m`
    // @param b `0 <= b < m`
    // @return `a * b % m`
    unsigned int mul(unsigned int a, unsigned int b) const {
        // [1] m = 1
        // a = b = im = 0, so okay

        // [2] m >= 2
        // im = ceil(2^64 / m)
        // -> im * m = 2^64 + r (0 <= r < m)
        // let z = a*b = c*m + d (0 <= c, d < m)
        // a*b * im = (c*m + d) * im = c*(im*m) + d*im = c*2^64 + c*r + d*im
        // c*r + d*im < m * m + m * im < m * m + 2^64 + m <= 2^64 + m * (m + 1) < 2^64 * 2
        // ((ab * im) >> 64) == c or c + 1
        unsigned long long z = a;
        z *= b;
#ifdef _MSC_VER
        unsigned long long x;
        _umul128(z, im, &x);
#else
        unsigned long long x =
            (unsigned long long)(((unsigned __int128)(z)*im) >> 64);
#endif
        unsigned long long y = x * _m;
        return (unsigned int)(z - y + (z < y ? _m : 0));
    }
};

// @param n `0 <= n`
// @param m `1 <= m`
// @return `(x ** n) % m`
constexpr long long pow_mod_constexpr(long long x, long long n, int m) {
    if (m == 1) return 0;
    unsigned int _m = (unsigned int)(m);
    unsigned long long r = 1;
    unsigned long long y = safe_mod(x, m);
    while (n) {
        if (n & 1) r = (r * y) % _m;
        y = (y * y) % _m;
        n >>= 1;
    }
    return r;
}

// Reference:
// M. Forisek and J. Jancina,
// Fast Primality Testing for Integers That Fit into a Machine Word
// @param n `0 <= n`
constexpr bool is_prime_constexpr(int n) {
    if (n <= 1) return false;
    if (n == 2 || n == 7 || n == 61) return true;
    if (n % 2 == 0) return false;
    long long d = n - 1;
    while (d % 2 == 0) d /= 2;
    constexpr long long bases[3] = {2, 7, 61};
    for (long long a : bases) {
        long long t = d;
        long long y = pow_mod_constexpr(a, t, n);
        while (t != n - 1 && y != 1 && y != n - 1) {
            y = y * y % n;
            t <<= 1;
        }
        if (y != n - 1 && t % 2 == 0) {
            return false;
        }
    }
    return true;
}
template <int n> constexpr bool is_prime = is_prime_constexpr(n);

// @param b `1 <= b`
// @return pair(g, x) s.t. g = gcd(a, b), xa = g (mod b), 0 <= x < b/g
constexpr std::pair<long long, long long> inv_gcd(long long a, long long b) {
    a = safe_mod(a, b);
    if (a == 0) return {b, 0};

    // Contracts:
    // [1] s - m0 * a = 0 (mod b)
    // [2] t - m1 * a = 0 (mod b)
    // [3] s * |m1| + t * |m0| <= b
    long long s = b, t = a;
    long long m0 = 0, m1 = 1;

    while (t) {
        long long u = s / t;
        s -= t * u;
        m0 -= m1 * u;  // |m1 * u| <= |m1| * s <= b

        // [3]:
        // (s - t * u) * |m1| + t * |m0 - m1 * u|
        // <= s * |m1| - t * u * |m1| + t * (|m0| + |m1| * u)
        // = s * |m1| + t * |m0| <= b

        auto tmp = s;
        s = t;
        t = tmp;
        tmp = m0;
        m0 = m1;
        m1 = tmp;
    }
    // by [3]: |m0| <= b/g
    // by g != b: |m0| < b/g
    if (m0 < 0) m0 += b / s;
    return {s, m0};
}

// Compile time primitive root
// @param m must be prime
// @return primitive root (and minimum in now)
constexpr int primitive_root_constexpr(int m) {
    if (m == 2) return 1;
    if (m == 167772161) return 3;
    if (m == 469762049) return 3;
    if (m == 754974721) return 11;
    if (m == 998244353) return 3;
    int divs[20] = {};
    divs[0] = 2;
    int cnt = 1;
    int x = (m - 1) / 2;
    while (x % 2 == 0) x /= 2;
    for (int i = 3; (long long)(i)*i <= x; i += 2) {
        if (x % i == 0) {
            divs[cnt++] = i;
            while (x % i == 0) {
                x /= i;
            }
        }
    }
    if (x > 1) {
        divs[cnt++] = x;
    }
    for (int g = 2;; g++) {
        bool ok = true;
        for (int i = 0; i < cnt; i++) {
            if (pow_mod_constexpr(g, (m - 1) / divs[i], m) == 1) {
                ok = false;
                break;
            }
        }
        if (ok) return g;
    }
}
template <int m> constexpr int primitive_root = primitive_root_constexpr(m);

// @param n `n < 2^32`
// @param m `1 <= m < 2^32`
// @return sum_{i=0}^{n-1} floor((ai + b) / m) (mod 2^64)
unsigned long long floor_sum_unsigned(unsigned long long n,
                                      unsigned long long m,
                                      unsigned long long a,
                                      unsigned long long b) {
    unsigned long long ans = 0;
    while (true) {
        if (a >= m) {
            ans += n * (n - 1) / 2 * (a / m);
            a %= m;
        }
        if (b >= m) {
            ans += n * (b / m);
            b %= m;
        }

        unsigned long long y_max = a * n + b;
        if (y_max < m) break;
        // y_max < m * (n + 1)
        // floor(y_max / m) <= n
        n = (unsigned long long)(y_max / m);
        b = (unsigned long long)(y_max % m);
        std::swap(m, a);
    }
    return ans;
}

}  // namespace internal

}  // namespace atcoder


#line 1 "lib/ac-library/atcoder/internal_type_traits.hpp"



#line 7 "lib/ac-library/atcoder/internal_type_traits.hpp"

namespace atcoder {

namespace internal {

#ifndef _MSC_VER
template <class T>
using is_signed_int128 =
    typename std::conditional<std::is_same<T, __int128_t>::value ||
                                  std::is_same<T, __int128>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using is_unsigned_int128 =
    typename std::conditional<std::is_same<T, __uint128_t>::value ||
                                  std::is_same<T, unsigned __int128>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using make_unsigned_int128 =
    typename std::conditional<std::is_same<T, __int128_t>::value,
                              __uint128_t,
                              unsigned __int128>;

template <class T>
using is_integral = typename std::conditional<std::is_integral<T>::value ||
                                                  is_signed_int128<T>::value ||
                                                  is_unsigned_int128<T>::value,
                                              std::true_type,
                                              std::false_type>::type;

template <class T>
using is_signed_int = typename std::conditional<(is_integral<T>::value &&
                                                 std::is_signed<T>::value) ||
                                                    is_signed_int128<T>::value,
                                                std::true_type,
                                                std::false_type>::type;

template <class T>
using is_unsigned_int =
    typename std::conditional<(is_integral<T>::value &&
                               std::is_unsigned<T>::value) ||
                                  is_unsigned_int128<T>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using to_unsigned = typename std::conditional<
    is_signed_int128<T>::value,
    make_unsigned_int128<T>,
    typename std::conditional<std::is_signed<T>::value,
                              std::make_unsigned<T>,
                              std::common_type<T>>::type>::type;

#else

template <class T> using is_integral = typename std::is_integral<T>;

template <class T>
using is_signed_int =
    typename std::conditional<is_integral<T>::value && std::is_signed<T>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using is_unsigned_int =
    typename std::conditional<is_integral<T>::value &&
                                  std::is_unsigned<T>::value,
                              std::true_type,
                              std::false_type>::type;

template <class T>
using to_unsigned = typename std::conditional<is_signed_int<T>::value,
                                              std::make_unsigned<T>,
                                              std::common_type<T>>::type;

#endif

template <class T>
using is_signed_int_t = std::enable_if_t<is_signed_int<T>::value>;

template <class T>
using is_unsigned_int_t = std::enable_if_t<is_unsigned_int<T>::value>;

template <class T> using to_unsigned_t = typename to_unsigned<T>::type;

}  // namespace internal

}  // namespace atcoder


#line 14 "lib/ac-library/atcoder/modint.hpp"

namespace atcoder {

namespace internal {

struct modint_base {};
struct static_modint_base : modint_base {};

template <class T> using is_modint = std::is_base_of<modint_base, T>;
template <class T> using is_modint_t = std::enable_if_t<is_modint<T>::value>;

}  // namespace internal

template <int m, std::enable_if_t<(1 <= m)>* = nullptr>
struct static_modint : internal::static_modint_base {
    using mint = static_modint;

  public:
    static constexpr int mod() { return m; }
    static mint raw(int v) {
        mint x;
        x._v = v;
        return x;
    }

    static_modint() : _v(0) {}
    template <class T, internal::is_signed_int_t<T>* = nullptr>
    static_modint(T v) {
        long long x = (long long)(v % (long long)(umod()));
        if (x < 0) x += umod();
        _v = (unsigned int)(x);
    }
    template <class T, internal::is_unsigned_int_t<T>* = nullptr>
    static_modint(T v) {
        _v = (unsigned int)(v % umod());
    }

    unsigned int val() const { return _v; }

    mint& operator++() {
        _v++;
        if (_v == umod()) _v = 0;
        return *this;
    }
    mint& operator--() {
        if (_v == 0) _v = umod();
        _v--;
        return *this;
    }
    mint operator++(int) {
        mint result = *this;
        ++*this;
        return result;
    }
    mint operator--(int) {
        mint result = *this;
        --*this;
        return result;
    }

    mint& operator+=(const mint& rhs) {
        _v += rhs._v;
        if (_v >= umod()) _v -= umod();
        return *this;
    }
    mint& operator-=(const mint& rhs) {
        _v -= rhs._v;
        if (_v >= umod()) _v += umod();
        return *this;
    }
    mint& operator*=(const mint& rhs) {
        unsigned long long z = _v;
        z *= rhs._v;
        _v = (unsigned int)(z % umod());
        return *this;
    }
    mint& operator/=(const mint& rhs) { return *this = *this * rhs.inv(); }

    mint operator+() const { return *this; }
    mint operator-() const { return mint() - *this; }

    mint pow(long long n) const {
        assert(0 <= n);
        mint x = *this, r = 1;
        while (n) {
            if (n & 1) r *= x;
            x *= x;
            n >>= 1;
        }
        return r;
    }
    mint inv() const {
        if (prime) {
            assert(_v);
            return pow(umod() - 2);
        } else {
            auto eg = internal::inv_gcd(_v, m);
            assert(eg.first == 1);
            return eg.second;
        }
    }

    friend mint operator+(const mint& lhs, const mint& rhs) {
        return mint(lhs) += rhs;
    }
    friend mint operator-(const mint& lhs, const mint& rhs) {
        return mint(lhs) -= rhs;
    }
    friend mint operator*(const mint& lhs, const mint& rhs) {
        return mint(lhs) *= rhs;
    }
    friend mint operator/(const mint& lhs, const mint& rhs) {
        return mint(lhs) /= rhs;
    }
    friend bool operator==(const mint& lhs, const mint& rhs) {
        return lhs._v == rhs._v;
    }
    friend bool operator!=(const mint& lhs, const mint& rhs) {
        return lhs._v != rhs._v;
    }

  private:
    unsigned int _v;
    static constexpr unsigned int umod() { return m; }
    static constexpr bool prime = internal::is_prime<m>;
};

template <int id> struct dynamic_modint : internal::modint_base {
    using mint = dynamic_modint;

  public:
    static int mod() { return (int)(bt.umod()); }
    static void set_mod(int m) {
        assert(1 <= m);
        bt = internal::barrett(m);
    }
    static mint raw(int v) {
        mint x;
        x._v = v;
        return x;
    }

    dynamic_modint() : _v(0) {}
    template <class T, internal::is_signed_int_t<T>* = nullptr>
    dynamic_modint(T v) {
        long long x = (long long)(v % (long long)(mod()));
        if (x < 0) x += mod();
        _v = (unsigned int)(x);
    }
    template <class T, internal::is_unsigned_int_t<T>* = nullptr>
    dynamic_modint(T v) {
        _v = (unsigned int)(v % mod());
    }

    unsigned int val() const { return _v; }

    mint& operator++() {
        _v++;
        if (_v == umod()) _v = 0;
        return *this;
    }
    mint& operator--() {
        if (_v == 0) _v = umod();
        _v--;
        return *this;
    }
    mint operator++(int) {
        mint result = *this;
        ++*this;
        return result;
    }
    mint operator--(int) {
        mint result = *this;
        --*this;
        return result;
    }

    mint& operator+=(const mint& rhs) {
        _v += rhs._v;
        if (_v >= umod()) _v -= umod();
        return *this;
    }
    mint& operator-=(const mint& rhs) {
        _v += mod() - rhs._v;
        if (_v >= umod()) _v -= umod();
        return *this;
    }
    mint& operator*=(const mint& rhs) {
        _v = bt.mul(_v, rhs._v);
        return *this;
    }
    mint& operator/=(const mint& rhs) { return *this = *this * rhs.inv(); }

    mint operator+() const { return *this; }
    mint operator-() const { return mint() - *this; }

    mint pow(long long n) const {
        assert(0 <= n);
        mint x = *this, r = 1;
        while (n) {
            if (n & 1) r *= x;
            x *= x;
            n >>= 1;
        }
        return r;
    }
    mint inv() const {
        auto eg = internal::inv_gcd(_v, mod());
        assert(eg.first == 1);
        return eg.second;
    }

    friend mint operator+(const mint& lhs, const mint& rhs) {
        return mint(lhs) += rhs;
    }
    friend mint operator-(const mint& lhs, const mint& rhs) {
        return mint(lhs) -= rhs;
    }
    friend mint operator*(const mint& lhs, const mint& rhs) {
        return mint(lhs) *= rhs;
    }
    friend mint operator/(const mint& lhs, const mint& rhs) {
        return mint(lhs) /= rhs;
    }
    friend bool operator==(const mint& lhs, const mint& rhs) {
        return lhs._v == rhs._v;
    }
    friend bool operator!=(const mint& lhs, const mint& rhs) {
        return lhs._v != rhs._v;
    }

  private:
    unsigned int _v;
    static internal::barrett bt;
    static unsigned int umod() { return bt.umod(); }
};
template <int id> internal::barrett dynamic_modint<id>::bt(998244353);

using modint998244353 = static_modint<998244353>;
using modint1000000007 = static_modint<1000000007>;
using modint = dynamic_modint<-1>;

namespace internal {

template <class T>
using is_static_modint = std::is_base_of<internal::static_modint_base, T>;

template <class T>
using is_static_modint_t = std::enable_if_t<is_static_modint<T>::value>;

template <class> struct is_dynamic_modint : public std::false_type {};
template <int id>
struct is_dynamic_modint<dynamic_modint<id>> : public std::true_type {};

template <class T>
using is_dynamic_modint_t = std::enable_if_t<is_dynamic_modint<T>::value>;

}  // namespace internal

}  // namespace atcoder


#line 1 "tools/assert_that.hpp"



#line 5 "tools/assert_that.hpp"
#include <cstdlib>

#define assert_that_impl(cond, file, line, func) do {\
  if (!cond) {\
    ::std::cerr << file << ':' << line << ": " << func << ": Assertion `" << #cond << "' failed." << '\n';\
    ::std::exit(EXIT_FAILURE);\
  }\
} while (false)
#define assert_that(...) assert_that_impl((__VA_ARGS__), __FILE__, __LINE__, __func__)


#line 1 "tools/extend_output.hpp"



// WARNING:
// This file adds functions to std namespace for convenience.
// Strictly speaking, it is not allowed in C++.
// It makes the program ill-formed to include this file, and may cause undefined behavior.

#line 16 "tools/extend_output.hpp"
#include <string>
#line 1 "tools/has_mod.hpp"



#line 6 "tools/has_mod.hpp"

namespace tools {
  template <typename T, typename = ::std::void_t<>>
  struct has_mod : ::std::false_type {};

  template <typename T>
  struct has_mod<T, ::std::void_t<decltype(::std::declval<T>().mod())>> : ::std::true_type {};

  template <typename T>
  inline constexpr bool has_mod_v = ::tools::has_mod<T>::value;
}


#line 24 "tools/extend_output.hpp"

namespace tools {
  namespace detail {
    namespace extend_output {
      template <typename T>
      ::std::ostream& debug_print(::std::ostream& os, const T& container) {
        ::std::string delimiter = "";
        os << '[';
        for (const auto& v : container) {
          os << delimiter << v;
          delimiter = ", ";
        }
        os << ']';
        return os;
      }
    }
  }
}

namespace std {
  template <class T, ::std::size_t N>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::array<T, N>& array) {
    return ::tools::detail::extend_output::debug_print(os, array);
  }
  
  template <class Key, class T, class Compare, class Allocator>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::map<Key, T, Compare, Allocator>& map) {
    return ::tools::detail::extend_output::debug_print(os, map);
  }

  template <typename T>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::optional<T>& optional) {
    if (optional) {
      return os << *optional;
    } else {
      return os << "null";
    }
  }
  
  template <class T1, class T2>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::pair<T1, T2>& pair) {
    return os << '[' << pair.first << ", " << pair.second << ']';
  }
  
  template <class T, class Container>
  ::std::ostream& operator<<(::std::ostream& os, ::std::queue<T, Container>& queue) {
    ::std::queue<T, Container> other = queue;
    ::std::string delimiter = "";
    os << '[';
    while (!queue.empty()) {
      os << delimiter << queue.front();
      delimiter = ", ";
      queue.pop();
    }
    os << ']';
  
    queue = ::std::move(other);
    return os;
  }
  
  template <class Key, class Compare, class Allocator>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::set<Key, Compare, Allocator>& set) {
    return ::tools::detail::extend_output::debug_print(os, set);
  }

  template <class T, class Container>
  ::std::ostream& operator<<(::std::ostream& os, ::std::stack<T, Container>& stack) {
    ::std::stack<T, Container> other;
    while (!stack.empty()) {
      other.push(stack.top());
      stack.pop();
    }
  
    ::std::string delimiter = "";
    os << '[';
    while (!other.empty()) {
      os << delimiter << other.top();
      delimiter = ", ";
      stack.push(other.top());
      other.pop();
    }
    os << ']';
  
    return os;
  }
  
  template <int I = -1, typename... Args>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::tuple<Args...>& tuple) {
    if constexpr (I == -1) {
      os << '[';
    } else if constexpr (I == int(sizeof...(Args))) {
      os << ']';
    } else if constexpr (I == 0) {
      os << ::std::get<I>(tuple);
    } else {
      os << ", " << ::std::get<I>(tuple);
    }
  
    if constexpr (I < int(sizeof...(Args))) {
      return operator<<<I + 1>(os, tuple);
    } else {
      return os;
    }
  }
  
  template <class Key, class T, class Hash, class Pred, class Allocator>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::unordered_map<Key, T, Hash, Pred, Allocator>& unordered_map) {
    return ::tools::detail::extend_output::debug_print(os, unordered_map);
  }
  
  template <class Key, class Hash, class Pred, class Allocator>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::unordered_set<Key, Hash, Pred, Allocator>& unordered_set) {
    return ::tools::detail::extend_output::debug_print(os, unordered_set);
  }
  
  template <class T, class Allocator>
  ::std::ostream& operator<<(::std::ostream& os, const ::std::vector<T, Allocator>& vector) {
    return ::tools::detail::extend_output::debug_print(os, vector);
  }
  
  template <typename T>
  ::std::enable_if_t<::tools::has_mod_v<T>, ::std::ostream&> operator<<(::std::ostream& os, const T& x) {
    return os << x.val();
  }
}


#line 19 "tests/extend_output.test.cpp"

using mint = atcoder::modint998244353;

int main() {
  std::cin.tie(nullptr);
  std::ios_base::sync_with_stdio(false);

  {
    std::array<int, 3> v = {123, 456, 789};
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
  }

  {
    std::map<int, int> v = {{{1, 123}, {2, 456}, {3, 789}}};
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[[1, 123], [2, 456], [3, 789]]");
  }

  {
    std::optional<int> v;
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "null");
  }
  {
    std::optional<int> v(123);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "123");
  }

  {
    std::pair<int, int> v(123, 456);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456]");
  }

  {
    std::queue<int> v;
    v.push(123);
    v.push(456);
    v.push(789);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
    assert_that(v.size() == 3);
    assert_that(v.front() == 123);
  }

  {
    std::set<int> v = {123, 456, 789};
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
  }

  {
    std::stack<int> v;
    v.push(123);
    v.push(456);
    v.push(789);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
    assert_that(v.size() == 3);
    assert_that(v.top() == 789);
  }

  {
    std::tuple<int, int, int> v(123, 456, 789);
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
  }

  {
    std::unordered_set<int> v = {123, 456, 789};
    std::ostringstream oss;
    oss << v;
    assert_that(
      oss.str() == "[123, 456, 789]"
      || oss.str() == "[123, 789, 456]"
      || oss.str() == "[456, 123, 789]"
      || oss.str() == "[456, 789, 123]"
      || oss.str() == "[789, 123, 456]"
      || oss.str() == "[789, 456, 123]"
    );
  }

  {
    std::unordered_map<int, int> v = {{{1, 123}, {2, 456}, {3, 789}}};
    std::ostringstream oss;
    oss << v;
    assert_that(
      oss.str() == "[[1, 123], [2, 456], [3, 789]]"
      || oss.str() == "[[1, 123], [3, 789], [2, 456]]"
      || oss.str() == "[[2, 456], [1, 123], [3, 789]]"
      || oss.str() == "[[2, 456], [3, 789], [1, 123]]"
      || oss.str() == "[[3, 789], [1, 123], [2, 456]]"
      || oss.str() == "[[3, 789], [2, 456], [1, 123]]"
    );
  }

  {
    std::vector<int> v = {123, 456, 789};
    std::ostringstream oss;
    oss << v;
    assert_that(oss.str() == "[123, 456, 789]");
  }

  {
    std::ostringstream oss;
    oss << mint(123);
    assert_that(oss.str() == "123");
  }

  return 0;
}

Back to top page