| Defined in header <utility> | ||||
|---|---|---|---|---|
| (1) | ||||
| (since C++11) (until C++14) | |||
| (since C++14) | |||
| (2) | ||||
| (since C++11) (until C++14) | |||
| (since C++14) | |||
| (3) | ||||
| (since C++11) (until C++14) | |||
| (since C++14) | |||
| (4) | (since C++17) | ||
| (5) | (since C++14) | ||
| (6) | (since C++14) | ||
| (7) | (since C++14) | ||
| (8) | (since C++17) | ||
| (9) | (since C++14) | ||
| (10) | (since C++14) | ||
| (11) | (since C++14) | ||
| (12) | (since C++17) |
Extracts an element from the pair using tuple-like interface.
The index-based overloads (1-4) fail to compile if the index N is neither 0 nor 1.
The type-based overloads (5-12) fail to compile if the types T and U are the same.
Parameters
| p | - | pair whose contents to extract |
Return value
1-4) Returns a reference to
p.first if N==0 and a reference to p.second if N==1. 5-8) Returns a reference to
p.first. 9-12) Returns a reference to
p.second.Exceptions
noexcept specification: noexceptExample
1 2 3 4 5 6 7 8 9 | #include <iostream>#include <utility> int main(){ auto p = std::make_pair(1, 3.14); std::cout << '(' << std::get<0>(p) << ", " << std::get<1>(p) << ")\n"; std::cout << '(' << std::get<int>(p) << ", " << std::get<double>(p) << ")\n";} |
Output:
1 2 | (1, 3.14)(1, 3.14) |
See also
| tuple accesses specified element (function template) | |
accesses an element of an array (function template) |
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