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Clarify that year represents the proleptic Gregorian calendar

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* Uses year{0} and negative years as opposed to AD/BC.
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Howard Hinnant
2018-06-03 14:03:29 -04:00
parent 4358ea7b6e
commit 0543e00b88
1 changed files with 6 additions and 2 deletions
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@@ -26,7 +26,7 @@
<br/> <br/>
<br/> <br/>
<a href="mailto:howard.hinnant@gmail.com">Howard E. Hinnant</a><br/> <a href="mailto:howard.hinnant@gmail.com">Howard E. Hinnant</a><br/>
2018-06-02<br/> 2018-06-03<br/>
</address> </address>
<hr/> <hr/>
<h1 align=center><code>date</code></h1> <h1 align=center><code>date</code></h1>
@@ -2843,7 +2843,11 @@ constexpr year operator "" _y(unsigned long long y) noexcept;
<code>year</code> represents a year in the Gregorian calendar. It shall represent values <code>year</code> represents a year in the Gregorian calendar. It shall represent values
in the range <code>[min(), max()]</code>. It can be constructed with any in the range <code>[min(), max()]</code>. It can be constructed with any
<code>int</code> value, which will be subsequently truncated to fit into <code>int</code> value, which will be subsequently truncated to fit into
<code>year</code>'s internal storage. <code>year</code> is equality and less-than <code>year</code>'s internal storage. The <code>year</code> prior to <code>year{1}</code>
is <code>year{0}</code>, and is a leap year. The <code>year</code> prior to
<code>year{0}</code> is <code>year{-1}</code>. This is commonly referred to as the
<a href="https://en.wikipedia.org/wiki/Proleptic_Gregorian_calendar">proleptic Gregorian calendar</a>.
<code>year</code> is equality and less-than
comparable, and participates in basic arithmetic with <code>years</code> representing the comparable, and participates in basic arithmetic with <code>years</code> representing the
quantity between any two <code>year</code>'s. One can form a <code>year</code> literal quantity between any two <code>year</code>'s. One can form a <code>year</code> literal
with <code>_y</code>. And one can stream out a <code>year</code> for debugging purposes. with <code>_y</code>. And one can stream out a <code>year</code> for debugging purposes.