public static member function
<chrono>
std::chrono::duration::max
static constexpr duration max();
Duration maximum value
Returns the maximum value of duration.
The function calls duration_value::max to obtain the maximum value for its internal count object:
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 | static constexpr duration max() {
  return duration_values<rep>::max();
}
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Return value
A duration object with its highest possible value.
Example
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 | // duration::min/max
#include <iostream>
#include <chrono>
int main ()
{
  std::cout << "system_clock durations can represent:\n";
  std::cout << "min: " << std::chrono::system_clock::duration::min().count() << "\n";
  std::cout << "max: " << std::chrono::system_clock::duration::max().count() << "\n";
  return 0;
}
 |  | 
Possible output:
| system_clock durations can represent:
min: -9223372036854775808
max: 9223372036854775807
 |