std::chrono::duration<Rep,Period>::operator+(unary), std::chrono::duration<Rep,Period>::operator-(unary)
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std::chrono::duration
Member functions
duration::operator+duration::operator-
Non-member functions
(until C++20)(C++20)
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Helper classes
(1)
constexpr duration operator+() const;
(until C++17)
constexpr std::common_type_t <duration> operator+() const;
(since C++17)
(2)
constexpr duration operator-() const;
(until C++17)
constexpr std::common_type_t <duration> operator-() const;
(since C++17)
Implements unary plus and unary minus for the durations.
If rep_ is a member variable holding the number of ticks in a duration object, and D is the return type,
1) Equivalent to return D(*this);.
2) Equivalent to return D(-rep_);.
Contents
[edit] Parameters
(none)
[edit] Return value
1) A copy of this duration object.
2) A copy of this duration object, with the number of ticks negated.
[edit] Example
Run this code
#include <chrono> #include <iostream> int main() { constexpr std::chrono::seconds s1(-052); constexpr std::chrono::seconds s2 = -s1; std::cout << "Negated " << s1 << " are " << s2 << '\n'; }
Output:
Negated -42s are 42s