tmp/tmp24lbxcvf/{from.md → to.md}
RENAMED
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| 1 |
+
#### Non-member functions <a id="time.cal.wd.nonmembers">[[time.cal.wd.nonmembers]]</a>
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``` cpp
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constexpr bool operator==(const weekday& x, const weekday& y) noexcept;
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```
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*Returns:* `x.wd_ == y.wd_`.
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``` cpp
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constexpr weekday operator+(const weekday& x, const days& y) noexcept;
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```
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*Returns:*
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``` cpp
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weekday{modulo(static_cast<long long>(x.wd_) + y.count(), 7)}
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| 17 |
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```
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where `modulo(n, 7)` computes the remainder of `n` divided by 7 using
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Euclidean division.
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[*Note 1*: Given a divisor of 7, Euclidean division truncates towards
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| 23 |
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negative infinity and always produces a remainder in the range of \[`0`,
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`6`\]. Assuming no overflow in the signed summation, this operation
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results in a `weekday` holding a value in the range \[`0`, `6`\] even if
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`!x.ok()`. — *end note*]
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[*Example 1*: `Monday + days{6} == Sunday`. — *end example*]
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``` cpp
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constexpr weekday operator+(const days& x, const weekday& y) noexcept;
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| 32 |
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```
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*Returns:* `y + x`.
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``` cpp
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constexpr weekday operator-(const weekday& x, const days& y) noexcept;
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| 38 |
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```
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*Returns:* `x + -y`.
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| 41 |
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| 42 |
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``` cpp
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| 43 |
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constexpr days operator-(const weekday& x, const weekday& y) noexcept;
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| 44 |
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```
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*Returns:* If `x.ok() == true` and `y.ok() == true`, returns a value `d`
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| 47 |
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in the range \[`days{0}`, `days{6}`\] satisfying `y + d == x`. Otherwise
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| 48 |
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the value returned is unspecified.
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[*Example 2*: `Sunday - Monday == days{6}`. — *end example*]
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``` cpp
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template<class charT, class traits>
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basic_ostream<charT, traits>&
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operator<<(basic_ostream<charT, traits>& os, const weekday& wd);
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```
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| 57 |
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| 58 |
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*Effects:* Equivalent to:
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| 59 |
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``` cpp
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return os << (wd.ok() ?
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format(os.getloc(), STATICALLY-WIDEN<charT>("{:%a}"), wd) :
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| 63 |
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format(os.getloc(), STATICALLY-WIDEN<charT>("{} is not a valid weekday"),
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| 64 |
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static_cast<unsigned>(wd.wd_)));
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| 65 |
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```
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| 66 |
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| 67 |
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``` cpp
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| 68 |
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template<class charT, class traits, class Alloc = allocator<charT>>
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| 69 |
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basic_istream<charT, traits>&
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| 70 |
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from_stream(basic_istream<charT, traits>& is, const charT* fmt,
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| 71 |
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weekday& wd, basic_string<charT, traits, Alloc>* abbrev = nullptr,
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| 72 |
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minutes* offset = nullptr);
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| 73 |
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```
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*Effects:* Attempts to parse the input stream `is` into the `weekday`
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| 76 |
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`wd` using the format flags given in the NTCTS `fmt` as specified in
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| 77 |
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[[time.parse]]. If the parse fails to decode a valid weekday,
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`is.setstate(ios_base::failbit)` is called and `wd` is not modified. If
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| 79 |
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`%Z` is used and successfully parsed, that value will be assigned to
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| 80 |
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`*abbrev` if `abbrev` is non-null. If `%z` (or a modified variant) is
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| 81 |
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used and successfully parsed, that value will be assigned to `*offset`
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| 82 |
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if `offset` is non-null.
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| 83 |
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| 84 |
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*Returns:* `is`.
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| 85 |
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