<tuple> 運算子

operator!=

比較兩個 tuple 物件是否不相等。

template <class T1, class T2, ..., class TN,
    class U1, class U2, ..., class UN>
bool operator!=(const tuple<T1, T2, ..., TN>& tpl1,
    const tuple<U1, U2, ..., UN>& tpl2);

參數

TN
第 N 個 tuple 項目類型。

備註

當 N 為 0 時，此函式會傳回 false，否則 get<0>(tpl1) != get<0>(tpl2) || get<1>(tpl1) != get<1>(tpl2) || ... || get<N - 1>(tpl1) == get<N - 1>(tpl2)。

範例

// std__tuple__operator_ne.cpp
// compile with: /EHsc
#include <tuple>
#include <iostream>

typedef std::tuple<int, double, int, double> Mytuple;
int main() {
    Mytuple c0(0, 1, 2, 3);

// display contents " 0 1 2 3"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

    Mytuple c1 = std::make_tuple(4, 5, 6, 7);

// display contents " 4 5 6 7"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

// display results of comparisons
    std::cout << std::boolalpha << " " << (c0 != c0);
    std::cout << std::endl;
    std::cout << std::boolalpha << " " << (c0 != c1);
    std::cout << std::endl;

    return (0);
}

0 1 2 3
0 1 2 3
false
true

operator<

比較 tuple 物件為小於。

template <class T1, class T2, ..., class TN,
    class U1, class U2, ..., class UN>
bool operator<(const tuple<T1, T2, ..., TN>& tpl1,
    const tuple<U1, U2, ..., UN>& tpl2);

參數

TN
第 N 個 tuple 項目類型。

備註

當 N 大於 0 且 tpl1 中的第一個不同值在比較後小於 tpl2 中的對應值時，函式傳回會 true，否則會傳回 false。

範例

// std__tuple__operator_lt.cpp
// compile with: /EHsc
#include <tuple>
#include <iostream>

typedef std::tuple<int, double, int, double> Mytuple;
int main() {
    Mytuple c0(0, 1, 2, 3);

// display contents " 0 1 2 3"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

    Mytuple c1 = std::make_tuple(4, 5, 6, 7);

// display contents " 4 5 6 7"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

// display results of comparisons
    std::cout << std::boolalpha << " " << (c0 < c0);
    std::cout << std::endl;
    std::cout << std::boolalpha << " " << (c0 < c1);
    std::cout << std::endl;

    return (0);
}

0 1 2 3
0 1 2 3
false
true

operator<=

比較 tuple 物件為小於或等於。

template <class T1, class T2, ..., class TN,
    class U1, class U2, ..., class UN>
bool operator<=(const tuple<T1, T2, ..., TN>& tpl1,
    const tuple<U1, U2, ..., UN>& tpl2);

參數

TN
第 N 個 tuple 項目類型。

備註

函式會傳回 !(tpl2 < tpl1)。

範例

// std__tuple__operator_le.cpp
// compile with: /EHsc
#include <tuple>
#include <iostream>

typedef std::tuple<int, double, int, double> Mytuple;
int main() {
    Mytuple c0(0, 1, 2, 3);

// display contents " 0 1 2 3"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

    Mytuple c1 = std::make_tuple(4, 5, 6, 7);

// display contents " 4 5 6 7"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

// display results of comparisons
    std::cout << std::boolalpha << " " << (c0 <= c0);
    std::cout << std::endl;
    std::cout << std::boolalpha << " " << (c1 <= c0);
    std::cout << std::endl;

    return (0);
}

0 1 2 3
0 1 2 3
true
false

operator==

比較兩個 tuple 物件是否相等。

template <class T1, class T2, ..., class TN,
    class U1, class U2, ..., class UN>
bool operator==(const tuple<T1, T2, ..., TN>& tpl1,
    const tuple<U1, U2, ..., UN>& tpl2);

參數

TN
第 N 個 tuple 項目類型。

備註

當 N 為 0 時，此函式會傳回 true，否則 get<0>(tpl1) == get<0>(tpl2) && get<1>(tpl1) == get<1>(tpl2) && ... && get<N - 1>(tpl1) == get<N - 1>(tpl2)。

範例

// std__tuple__operator_eq.cpp
// compile with: /EHsc
#include <tuple>
#include <iostream>

typedef std::tuple<int, double, int, double> Mytuple;
int main() {
    Mytuple c0(0, 1, 2, 3);

// display contents " 0 1 2 3"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

    Mytuple c1 = std::make_tuple(4, 5, 6, 7);

// display contents " 4 5 6 7"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

// display results of comparisons
    std::cout << std::boolalpha << " " << (c0 == c0);
    std::cout << std::endl;
    std::cout << std::boolalpha << " " << (c0 == c1);
    std::cout << std::endl;

    return (0);
}

0 1 2 3
0 1 2 3
true
false

operator>

比較 tuple 物件為大於。

template <class T1, class T2, ..., class TN,
    class U1, class U2, ..., class UN>
bool operator>(const tuple<T1, T2, ..., TN>& tpl1,
    const tuple<U1, U2, ..., UN>& tpl2);

參數

TN
第 N 個 tuple 項目類型。

備註

函式會傳回 tpl2 < tpl1。

範例

// std__tuple__operator_gt.cpp
// compile with: /EHsc
#include <tuple>
#include <iostream>

typedef std::tuple<int, double, int, double> Mytuple;
int main() {
    Mytuple c0(0, 1, 2, 3);

// display contents " 0 1 2 3"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

    Mytuple c1 = std::make_tuple(4, 5, 6, 7);

// display contents " 4 5 6 7"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

// display results of comparisons
    std::cout << std::boolalpha << " " << (c0 > c0);
    std::cout << std::endl;
    std::cout << std::boolalpha << " " << (c1 > c0);
    std::cout << std::endl;

    return (0);
}

0 1 2 3
0 1 2 3
false
true

operator>=

比較 tuple 物件為大於或等於。

template <class T1, class T2, ..., class TN,
    class U1, class U2, ..., class UN>
bool operator>=(const tuple<T1, T2, ..., TN>& tpl1,
    const tuple<U1, U2, ..., UN>& tpl2);

參數

TN
第 N 個 tuple 項目類型。

備註

函式會傳回 !(tpl1 < tpl2)。

範例

// std__tuple__operator_ge.cpp
// compile with: /EHsc
#include <tuple>
#include <iostream>

typedef std::tuple<int, double, int, double> Mytuple;
int main() {
    Mytuple c0(0, 1, 2, 3);

// display contents " 0 1 2 3"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

    Mytuple c1 = std::make_tuple(4, 5, 6, 7);

// display contents " 4 5 6 7"
    std::cout << " " << std::get<0>(c0);
    std::cout << " " << std::get<1>(c0);
    std::cout << " " << std::get<2>(c0);
    std::cout << " " << std::get<3>(c0);
    std::cout << std::endl;

// display results of comparisons
    std::cout << std::boolalpha << " " << (c0 >= c0);
    std::cout << std::endl;
    std::cout << std::boolalpha << " " << (c0 >= c1);
    std::cout << std::endl;

    return (0);
}

0 1 2 3
0 1 2 3
true
false