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< p >
The < a href = "http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf" target = "_top" > TR1
Tuple< / a > type provides a default constructor, a constructor that takes
initializers for all of its elements, a copy constructor, and a converting
copy constructor. The details of the various constructors are described
in this section.
< / p >
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< a href = "construction.html#fusion.tuple.class_template_tuple.construction.specification" > Specification< / a >
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< p class = "title" > < b > Notation< / b > < / p >
< dl >
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< dt > < span class = "term" > < tt class = "computeroutput" > < span class = "identifier" > T1< / span >
< span class = "special" > ...< / span > < span class = "identifier" > TN< / span > < / tt > ,
< tt class = "computeroutput" > < span class = "identifier" > U1< / span > < span class = "special" > ...< / span >
< span class = "identifier" > UN< / span > < / tt > < / span > < / dt >
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< dd > < p >
Tuple element types
< / p > < / dd >
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< dt > < span class = "term" > < tt class = "computeroutput" > < span class = "identifier" > P1< / span >
< span class = "special" > ...< / span > < span class = "identifier" > PN< / span > < / tt > < / span > < / dt >
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< dd > < p >
Parameter types
< / p > < / dd >
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< dt > < span class = "term" > < tt class = "computeroutput" > < span class = "identifier" > Ti< / span > < / tt > ,
< tt class = "computeroutput" > < span class = "identifier" > Ui< / span > < / tt > < / span > < / dt >
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< dd > < p >
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The type of the < tt class = "computeroutput" > < span class = "identifier" > i< / span > < / tt > th
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element of a tuple
< / p > < / dd >
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< dt > < span class = "term" > < tt class = "computeroutput" > < span class = "identifier" > Pi< / span > < / tt > < / span > < / dt >
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< dd > < p >
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The type of the < tt class = "computeroutput" > < span class = "identifier" > i< / span > < / tt > th
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parameter
< / p > < / dd >
< / dl >
< / div >
< pre class = "programlisting" >
< span class = "identifier" > tuple< / span > < span class = "special" > ();< / span >
< / pre >
< p >
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< span class = "bold" > < b > Requirements< / b > < / span > : Each < tt class = "computeroutput" > < span class = "identifier" > Ti< / span > < / tt >
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is default constructable.
< / p >
< p >
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< span class = "bold" > < b > Semantics< / b > < / span > : Default initializes each element
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of the tuple.
< / p >
< pre class = "programlisting" >
< span class = "identifier" > tuple< / span > < span class = "special" > (< / span > < span class = "identifier" > P1< / span > < span class = "special" > ,< / span > < span class = "identifier" > P2< / span > < span class = "special" > ,...,< / span > < span class = "identifier" > PN< / span > < span class = "special" > );< / span >
< / pre >
< p >
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< span class = "bold" > < b > Requirements< / b > < / span > : Each < tt class = "computeroutput" > < span class = "identifier" > Pi< / span > < / tt >
is < tt class = "computeroutput" > < span class = "identifier" > Ti< / span > < / tt > if < tt class = "computeroutput" > < span class = "identifier" > Ti< / span > < / tt > is a reference type, < tt class = "computeroutput" > < span class = "keyword" > const< / span > < span class = "identifier" > Ti< / span > < span class = "special" > & < / span > < / tt > otherwise.
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< / p >
< p >
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< span class = "bold" > < b > Semantics< / b > < / span > : Copy initializes each element
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with the corresponding parameter.
< / p >
< pre class = "programlisting" >
< span class = "identifier" > tuple< / span > < span class = "special" > (< / span > < span class = "keyword" > const< / span > < span class = "identifier" > tuple< / span > < span class = "special" > & < / span > < span class = "identifier" > t< / span > < span class = "special" > );< / span >
< / pre >
< p >
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< span class = "bold" > < b > Requirements< / b > < / span > : Each < tt class = "computeroutput" > < span class = "identifier" > Ti< / span > < / tt >
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should be copy constructable.
< / p >
< p >
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< span class = "bold" > < b > Semantics< / b > < / span > : Copy constructs each element
of < tt class = "computeroutput" > < span class = "special" > *< / span > < span class = "keyword" > this< / span > < / tt >
with the corresponding element of < tt class = "computeroutput" > < span class = "identifier" > t< / span > < / tt > .
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< / p >
< pre class = "programlisting" >
< span class = "keyword" > template< / span > < span class = "special" > < < / span > < span class = "keyword" > typename< / span > < span class = "identifier" > U1< / span > < span class = "special" > ,< / span > < span class = "keyword" > typename< / span > < span class = "identifier" > U2< / span > < span class = "special" > ,< / span > < span class = "special" > ...,< / span > < span class = "keyword" > typename< / span > < span class = "identifier" > UN< / span > < span class = "special" > > < / span >
< span class = "identifier" > tuple< / span > < span class = "special" > (< / span > < span class = "keyword" > const< / span > < span class = "identifier" > tuple< / span > < span class = "special" > < < / span > < span class = "identifier" > U1< / span > < span class = "special" > ,< / span > < span class = "identifier" > U2< / span > < span class = "special" > ,< / span > < span class = "special" > ...,< / span > < span class = "identifier" > UN< / span > < span class = "special" > > & < / span > < span class = "identifier" > t< / span > < span class = "special" > );< / span >
< / pre >
< p >
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< span class = "bold" > < b > Requirements< / b > < / span > : Each < tt class = "computeroutput" > < span class = "identifier" > Ti< / span > < / tt >
shall be constructible from the corresponding < tt class = "computeroutput" > < span class = "identifier" > Ui< / span > < / tt > .
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< / p >
< p >
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< span class = "bold" > < b > Semantics< / b > < / span > : Constructs each element of
< tt class = "computeroutput" > < span class = "special" > *< / span > < span class = "keyword" > this< / span > < / tt >
with the corresponding element of < tt class = "computeroutput" > < span class = "identifier" > t< / span > < / tt > .
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< td align = "right" > < div class = "copyright-footer" > Copyright <20> 2001-2007 Joel de Guzman, Dan Marsden, Tobias
Schwinger< p >
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at < a href = "http://www.boost.org/LICENSE_1_0.txt" target = "_top" > http://www.boost.org/LICENSE_1_0.txt< / a > )
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