std::chrono::month_day_last::ok

From cppreference.com
 
 
Utilities library
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General utilities
Date and time
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Formatting library (C++20)
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(C++20)(C++20)(C++20)   
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(C++23)
Elementary string conversions
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(C++17)

 
 
 
constexpr bool ok() const noexcept;
(since C++20)

Checks if the month object stored in *this is valid.

Return value

month().ok()

Example

#include <cassert>
#include <chrono>
 
int main()
{
    auto mdl{std::chrono::February/std::chrono::last};
    assert(mdl.ok());
    mdl = {std::chrono::month(42)/std::chrono::last};
    assert(!mdl.ok());
}