tmp/tmp1p34sm0m/{from.md → to.md}
RENAMED
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@@ -31,27 +31,40 @@ standard C streams provided for by the functions declared in `<cstdio>`,
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and includes all the headers necessary to use these objects.
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The objects are constructed and the associations are established at some
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time prior to or during the first time an object of class
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`ios_base::Init` is constructed, and in any case before the body of
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`main` [[basic.start.main]] begins execution.
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destroyed during program execution.[^
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-
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-
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Mixing operations on corresponding wide- and narrow-character streams
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follows the same semantics as mixing such operations on `FILE`s, as
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specified in the C standard library.
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Concurrent access to a synchronized [[ios.members.static]] standard
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iostream object’s formatted and unformatted input [[istream]] and output
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[[ostream]] functions or a standard C stream by multiple threads does
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not result in a data race [[intro.multithread]].
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[*Note
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characters. — *end note*]
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See also: ISO C 7.21.2
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### Narrow stream objects <a id="narrow.stream.objects">[[narrow.stream.objects]]</a>
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and includes all the headers necessary to use these objects.
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The objects are constructed and the associations are established at some
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time prior to or during the first time an object of class
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`ios_base::Init` is constructed, and in any case before the body of
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`main` [[basic.start.main]] begins execution. The objects are not
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destroyed during program execution.[^4]
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*Recommended practice:* If it is possible for them to do so,
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implementations should initialize the objects earlier than required.
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The results of including `<iostream>` in a translation unit shall be as
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if `<iostream>` defined an instance of `ios_base::Init` with static
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storage duration. Each C++ library module [[std.modules]] in a hosted
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implementation shall behave as if it contains an interface unit that
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defines an unexported `ios_base::Init` variable with ordered
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initialization [[basic.start.dynamic]].
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[*Note 1*: As a result, the definition of that variable is
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appearance-ordered before any declaration following the point of
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importation of a C++ library module. Whether such a definition exists is
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unobservable by a program that does not reference any of the standard
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iostream objects. — *end note*]
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Mixing operations on corresponding wide- and narrow-character streams
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follows the same semantics as mixing such operations on `FILE`s, as
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specified in the C standard library.
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Concurrent access to a synchronized [[ios.members.static]] standard
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iostream object’s formatted and unformatted input [[istream]] and output
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[[ostream]] functions or a standard C stream by multiple threads does
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not result in a data race [[intro.multithread]].
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[*Note 2*: Unsynchronized concurrent use of these objects and streams
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by multiple threads can result in interleaved characters. — *end note*]
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See also: ISO C 7.21.2
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### Narrow stream objects <a id="narrow.stream.objects">[[narrow.stream.objects]]</a>
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