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< title > unfused_generic</ title >
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< div class = "titlepage" >< div >< div >< h4 class = "title" >
< a name = "fusion.functional.adapters.unfused_generic" ></ a >< a href = "unfused_generic.html" title = "unfused_generic" > unfused_generic</ a ></ h4 ></ div ></ div ></ div >
< a name = "fusion.functional.adapters.unfused_generic.description" ></ a >< h5 >
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< a name = "id1213482" ></ a >
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< a href = "unfused_generic.html#fusion.functional.adapters.unfused_generic.description" > Description</ a >
</ h5 >
< p >
An n-ary < a href = "../concepts/poly.html" title = " Polymorphic Function
Object" > Polymorphic Function
Object</ a > adapter template for an unary < a href = "../concepts/poly.html" title = " Polymorphic Function
Object" > Polymorphic
Function Object</ a > target function. When called, its arguments are
bundled to a < a href = "../../sequences/concepts/random_access_sequence.html" title = "Random
Access Sequence" > Random
Access Sequence</ a > of references that is passed to the target function.
Non-const LValue arguments are transported as references to non-const,
otherwise references to const are used.
</ p >
< div class = "tip" >< table border = "0" summary = "Tip" >
< tr >
< td rowspan = "2" align = "center" valign = "top" width = "25" >< img alt = "[Tip]" src = "../../../images/tip.png" ></ td >
< th align = "left" > Tip</ th >
</ tr >
< tr >< td align = "left" valign = "top" >< p >
Detecting mutable LValues on a per-argument basis is currently a compile
time expensive operation (see < a href = "http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1385.htm" target = "_top" > The
Forwarding Problem</ a > for details). Therefore, there are two, lightweight
and more restricted variants of this class template, < a href = "unfused_lvalue_args.html" title = "unfused_lvalue_args" >< code class = "computeroutput" >< span class = "identifier" > unfused_lvalue_args</ span ></ code ></ a > and < a href = "unfused_rvalue_args.html" title = "unfused_rvalue_args" >< code class = "computeroutput" >< span class = "identifier" > unfused_rvalue_args</ span ></ code ></ a > .
</ p ></ td ></ tr >
</ table ></ div >
< p >
The overload set of the adapter's function call operator can be restricted
by removing the < code class = "computeroutput" >< span class = "identifier" > type</ span ></ code > member
from the nested result metafunction of the < a href = "../concepts/poly.html" title = " Polymorphic Function
Object" > Polymorphic
Function Object</ a > (in this case the substitution-failure-is-not-an-error
principle applies for non-nullary case and nullary calls are explicitly
disabled by the library).
</ p >
< div class = "caution" >< table border = "0" summary = "Caution" >
< tr >
< td rowspan = "2" align = "center" valign = "top" width = "25" >< img alt = "[Caution]" src = "../../../images/caution.png" ></ td >
< th align = "left" > Caution</ th >
</ tr >
< tr >< td align = "left" valign = "top" >< p >
As the nullary call operator cannot be a template it will be instantiated
along with the class template, so it must be disabled (as described above)
in cases where it isn't instantiable.
</ p ></ td ></ tr >
</ table ></ div >
< p >
The type of the target function is allowed to be const qualified or a reference.
Const qualification is preserved and propagated appropriately (in other
words, only const versions of < code class = "literal" > operator()</ code > can be used
if the target function object is const - or, in case the target function
object is held by value, the adapter is const).
</ p >
< a name = "fusion.functional.adapters.unfused_generic.header" ></ a >< h5 >
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< a name = "id1213642" ></ a >
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< a href = "unfused_generic.html#fusion.functional.adapters.unfused_generic.header" > Header</ a >
</ h5 >
< pre class = "programlisting" >
< span class = "preprocessor" > #include</ span > < span class = "special" > < </ span >< span class = "identifier" > boost</ span >< span class = "special" > /</ span >< span class = "identifier" > fusion</ span >< span class = "special" > /</ span >< span class = "identifier" > functional</ span >< span class = "special" > /</ span >< span class = "identifier" > adapter</ span >< span class = "special" > /</ span >< span class = "identifier" > unfused_generic</ span >< span class = "special" > .</ span >< span class = "identifier" > hpp</ span >< span class = "special" > > </ span >
</ pre >
< a name = "fusion.functional.adapters.unfused_generic.synopsis" ></ a >< h5 >
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< a name = "id1213736" ></ a >
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< a href = "unfused_generic.html#fusion.functional.adapters.unfused_generic.synopsis" > Synopsis</ a >
</ h5 >
< pre class = "programlisting" >
< span class = "keyword" > template</ span > < span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Function</ span >< span class = "special" > > </ span >
< span class = "keyword" > class</ span > < span class = "identifier" > unfused_generic</ span >< span class = "special" > ;</ span >
</ pre >
< a name = "fusion.functional.adapters.unfused_generic.template_parameters" ></ a >< h5 >
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< a name = "id1213806" ></ a >
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< a href = "unfused_generic.html#fusion.functional.adapters.unfused_generic.template_parameters" > Template
parameters</ a >
</ h5 >
< div class = "informaltable" >< table class = "table" >
< colgroup >
< col >
< col >
< col >
</ colgroup >
< thead >< tr >
< th > Parameter</ th >
< th > Description</ th >
< th > Default</ th >
</ tr ></ thead >
< tbody >< tr >
< td >< code class = "computeroutput" >< span class = "identifier" > Function</ span ></ code ></ td >
< td > An
unary < a href = "../concepts/poly.html" title = " Polymorphic Function
Object" > Polymorphic
Function Object</ a >
</ td >
< td > </ td >
</ tr ></ tbody >
</ table ></ div >
< a name = "fusion.functional.adapters.unfused_generic.model_of" ></ a >< h5 >
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< a name = "id1213881" ></ a >
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< a href = "unfused_generic.html#fusion.functional.adapters.unfused_generic.model_of" > Model
of</ a >
</ h5 >
< div class = "itemizedlist" >< ul type = "disc" >
< li >< a href = "../concepts/poly.html" title = " Polymorphic Function
Object" > Polymorphic Function
Object</ a ></ li >
< li >< a href = "../concepts/def_callable.html" title = " Deferred
Callable Object" > Deferred Callable
Object</ a ></ li >
</ ul ></ div >
< div class = "variablelist" >
< p class = "title" >< b > Notation</ b ></ p >
< dl >
< dt >< span class = "term" >< code class = "computeroutput" >< span class = "identifier" > F</ span ></ code ></ span ></ dt >
< dd >
A possibly const qualified, unary < a href = "../concepts/poly.html" title = " Polymorphic Function
Object" > Polymorphic
Function Object</ a > type or reference type thereof
</ dd >
< dt >< span class = "term" >< code class = "computeroutput" >< span class = "identifier" > f</ span ></ code ></ span ></ dt >
< dd >
An object convertible to < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code >
</ dd >
< dt >< span class = "term" >< code class = "computeroutput" >< span class = "identifier" > UG</ span ></ code ></ span ></ dt >
< dd >
The type < code class = "computeroutput" >< span class = "identifier" > unfused_generic</ span >< span class = "special" > < </ span >< span class = "identifier" > F</ span >< span class = "special" > > </ span ></ code >
</ dd >
< dt >< span class = "term" >< code class = "computeroutput" >< span class = "identifier" > ug</ span ></ code ></ span ></ dt >
< dd >
An instance of < code class = "computeroutput" >< span class = "identifier" > UG</ span ></ code > , initialized
with < code class = "computeroutput" >< span class = "identifier" > f</ span ></ code >
</ dd >
< dt >< span class = "term" >< code class = "computeroutput" >< span class = "identifier" > a0</ span ></ code > ...< code class = "computeroutput" >< span class = "identifier" > aN</ span ></ code ></ span ></ dt >
< dd >
Arguments to < code class = "computeroutput" >< span class = "identifier" > ug</ span ></ code >
</ dd >
</ dl >
</ div >
< a name = "fusion.functional.adapters.unfused_generic.expression_semantics" ></ a >< h5 >
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< a name = "id1214088" ></ a >
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< a href = "unfused_generic.html#fusion.functional.adapters.unfused_generic.expression_semantics" > Expression
Semantics</ a >
</ h5 >
< div class = "informaltable" >< table class = "table" >
< colgroup >
< col >
< col >
</ colgroup >
< thead >< tr >
< th > Expression</ th >
< th > Semantics</ th >
</ tr ></ thead >
< tbody >
< tr >
< td >< code class = "computeroutput" >< span class = "identifier" > UG</ span >< span class = "special" > (</ span >< span class = "identifier" > f</ span >< span class = "special" > )</ span ></ code ></ td >
< td > Creates
a fused function as described above, initializes the target function
with < code class = "computeroutput" >< span class = "identifier" > f</ span ></ code > .</ td >
</ tr >
< tr >
< td >< code class = "computeroutput" >< span class = "identifier" > UG</ span >< span class = "special" > ()</ span ></ code ></ td >
< td > Creates
a fused function as described above, attempts to use < code class = "computeroutput" >< span class = "identifier" > F</ span ></ code > 's default constructor.</ td >
</ tr >
< tr >
< td >
< code class = "computeroutput" >< span class = "identifier" > ug</ span >< span class = "special" > (</ span >< span class = "identifier" > a0</ span ></ code > ...< code class = "computeroutput" >< span class = "identifier" > aN</ span >< span class = "special" > )</ span ></ code >
</ td >
< td > Calls < code class = "computeroutput" >< span class = "identifier" > f</ span ></ code > with a < a href = "../../sequences.html" title = "Sequences" > Sequence</ a >
that contains references to the arguments < code class = "computeroutput" >< span class = "identifier" > a0</ span ></ code > ...< code class = "computeroutput" >< span class = "identifier" > aN</ span ></ code > .</ td >
</ tr >
</ tbody >
</ table ></ div >
< a name = "fusion.functional.adapters.unfused_generic.example" ></ a >< h5 >
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< a name = "id1214276" ></ a >
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< a href = "unfused_generic.html#fusion.functional.adapters.unfused_generic.example" > Example</ a >
</ h5 >
< pre class = "programlisting" >
< span class = "keyword" > template</ span > < span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > Function</ span >< span class = "special" > ,</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span >
< span class = "keyword" > class</ span > < span class = "identifier" > fused_bound_1st</ span >
< span class = "special" > {</ span >
< span class = "keyword" > typename</ span > < span class = "identifier" > traits</ span >< span class = "special" > ::</ span >< a href = "../../support/deduce.html" title = "deduce" >< code class = "computeroutput" >< span class = "identifier" > deduce</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "identifier" > Function</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span > < span class = "identifier" > fnc_deferred</ span >< span class = "special" > ;</ span >
< span class = "keyword" > typename</ span > < span class = "identifier" > traits</ span >< span class = "special" > ::</ span >< a href = "../../support/deduce.html" title = "deduce" >< code class = "computeroutput" >< span class = "identifier" > deduce</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "identifier" > T</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span > < span class = "identifier" > xxx_bound</ span >< span class = "special" > ;</ span >
< span class = "keyword" > public</ span >< span class = "special" > :</ span >
< span class = "identifier" > fused_bound_1st</ span >< span class = "special" > (</ span >< span class = "identifier" > Function</ span > < span class = "identifier" > deferred</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span > < span class = "identifier" > bound</ span >< span class = "special" > )</ span >
< span class = "special" > :</ span > < span class = "identifier" > fnc_deferred</ span >< span class = "special" > (</ span >< span class = "identifier" > deferred</ span >< span class = "special" > ),</ span > < span class = "identifier" > xxx_bound</ span >< span class = "special" > (</ span >< span class = "identifier" > bound</ span >< span class = "special" > )</ span >
< span class = "special" > {</ span > < span class = "special" > }</ span >
< span class = "keyword" > template</ span > < span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Seq</ span >< span class = "special" > > </ span >
< span class = "keyword" > struct</ span > < span class = "identifier" > result</ span >
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< span class = "special" > :</ span > < a href = "../invocation/metafunctions/invoke.html" title = "invoke" >< code class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > invoke</ span ></ code ></ a >< span class = "special" > < </ span > < span class = "identifier" > Function</ span >< span class = "special" > ,</ span >
< span class = "keyword" > typename</ span > < a href = "../../algorithms/transformation/metafunctions/push_front.html" title = "push_front" >< code class = "computeroutput" >< span class = "identifier" > result_of</ span >< span class = "special" > ::</ span >< span class = "identifier" > push_front</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "identifier" > Seq</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span > < span class = "special" > > </ span >
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< span class = "special" > {</ span > < span class = "special" > };</ span >
< span class = "keyword" > template</ span > < span class = "special" > < </ span >< span class = "keyword" > class</ span > < span class = "identifier" > Seq</ span >< span class = "special" > > </ span >
< span class = "keyword" > typename</ span > < span class = "identifier" > result</ span >< span class = "special" > < </ span >< span class = "identifier" > Seq</ span >< span class = "special" > > ::</ span >< span class = "identifier" > type</ span > < span class = "keyword" > operator</ span >< span class = "special" > ()(</ span >< span class = "identifier" > Seq</ span > < span class = "keyword" > const</ span > < span class = "special" > & </ span > < span class = "identifier" > s</ span >< span class = "special" > )</ span > < span class = "keyword" > const</ span >
< span class = "special" > {</ span >
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< span class = "keyword" > return</ span > < a href = "../invocation/functions/invoke.html" title = "invoke" >< code class = "computeroutput" >< span class = "identifier" > invoke</ span ></ code ></ a >< span class = "special" > (</ span >< span class = "identifier" > fnc_deferred</ span >< span class = "special" > ,</ span > < span class = "identifier" > push_front</ span >< span class = "special" > (</ span >< span class = "identifier" > s</ span >< span class = "special" > ,</ span >< span class = "identifier" > xxx_bound</ span >< span class = "special" > ));</ span >
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< span class = "special" > }</ span >
< span class = "special" > };</ span >
< span class = "keyword" > template</ span > < span class = "special" > < </ span >< span class = "keyword" > typename</ span > < span class = "identifier" > Function</ span >< span class = "special" > ,</ span > < span class = "keyword" > typename</ span > < span class = "identifier" > T</ span >< span class = "special" > > </ span >
< span class = "identifier" > unfused_generic</ span >< span class = "special" > < </ span > < span class = "identifier" > fused_bound_1st</ span >< span class = "special" > < </ span >< span class = "identifier" > Function</ span >< span class = "special" > ,</ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "special" > > </ span >
< span class = "identifier" > bind_1st</ span >< span class = "special" > (</ span >< span class = "identifier" > Function</ span > < span class = "identifier" > f</ span >< span class = "special" > ,</ span > < span class = "identifier" > T</ span > < span class = "keyword" > const</ span > < span class = "special" > & </ span > < span class = "identifier" > x</ span >< span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > unfused_generic</ span >< span class = "special" > < </ span > < span class = "identifier" > fused_bound_1st</ span >< span class = "special" > < </ span >< span class = "identifier" > Function</ span >< span class = "special" > ,</ span >< span class = "identifier" > T</ span >< span class = "special" > > </ span > < span class = "special" > > (</ span >
< span class = "identifier" > fused_bound_1st</ span >< span class = "special" > < </ span >< span class = "identifier" > Function</ span >< span class = "special" > ,</ span >< span class = "identifier" > T</ span >< span class = "special" > > (</ span >< span class = "identifier" > f</ span >< span class = "special" > ,</ span >< span class = "identifier" > x</ span >< span class = "special" > )</ span > < span class = "special" > );</ span >
< span class = "special" > }</ span >
< span class = "keyword" > int</ span > < span class = "identifier" > test_func</ span >< span class = "special" > (</ span >< span class = "keyword" > int</ span > < span class = "identifier" > a</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span > < span class = "identifier" > b</ span >< span class = "special" > ,</ span > < span class = "keyword" > int</ span > < span class = "identifier" > c</ span >< span class = "special" > )</ span >
< span class = "special" > {</ span >
< span class = "keyword" > return</ span > < span class = "identifier" > a</ span >< span class = "special" > +</ span >< span class = "identifier" > b</ span >< span class = "special" > +</ span >< span class = "identifier" > c</ span >< span class = "special" > ;</ span >
< span class = "special" > }</ span >
< span class = "keyword" > void</ span > < span class = "identifier" > try_it</ span >< span class = "special" > ()</ span >
< span class = "special" > {</ span >
< span class = "identifier" > assert</ span >< span class = "special" > (</ span >< span class = "identifier" > bind_1st</ span >< span class = "special" > (& </ span > < span class = "identifier" > test_func</ span >< span class = "special" > ,</ span >< span class = "number" > 3</ span >< span class = "special" > )(-</ span >< span class = "number" > 2</ span >< span class = "special" > ,-</ span >< span class = "number" > 1</ span >< span class = "special" > )</ span > < span class = "special" > ==</ span > < span class = "number" > 0</ span >< span class = "special" > );</ span >
< span class = "identifier" > assert</ span >< span class = "special" > (</ span >< span class = "identifier" > bind_1st</ span >< span class = "special" > (</ span >< a href = "http://www.sgi.com/tech/stl/plus.html" target = "_top" >< code class = "computeroutput" >< span class = "identifier" > std</ span >< span class = "special" > ::</ span >< span class = "identifier" > plus</ span ></ code ></ a >< span class = "special" > < </ span >< span class = "keyword" > float</ span >< span class = "special" > > (),</ span > < span class = "number" > 1</ span >< span class = "special" > )(</ span >< span class = "number" > 0.5f</ span >< span class = "special" > )</ span > < span class = "special" > ==</ span > < span class = "number" > 1.5f</ span >< span class = "special" > );</ span >
< span class = "special" > }</ span >
</ pre >
< a name = "fusion.functional.adapters.unfused_generic.see_also" ></ a >< h5 >
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< a name = "id1215428" ></ a >
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< a href = "unfused_generic.html#fusion.functional.adapters.unfused_generic.see_also" > See
also</ a >
</ h5 >
< div class = "itemizedlist" >< ul type = "disc" >
< li >< a href = "unfused_lvalue_args.html" title = "unfused_lvalue_args" >< code class = "computeroutput" >< span class = "identifier" > unfused_lvalue_args</ span ></ code ></ a ></ li >
< li >< a href = "unfused_rvalue_args.html" title = "unfused_rvalue_args" >< code class = "computeroutput" >< span class = "identifier" > unfused_rvalue_args</ span ></ code ></ a ></ li >
< li >< a href = "unfused_typed.html" title = "unfused_typed" >< code class = "computeroutput" >< span class = "identifier" > unfused_typed</ span ></ code ></ a ></ li >
< li >< a href = "../../support/deduce.html" title = "deduce" >< code class = "computeroutput" >< span class = "identifier" > deduce</ span ></ code ></ a ></ li >
< li >< a href = "../../support/deduce_sequence.html" title = "deduce_sequence" >< code class = "computeroutput" >< span class = "identifier" > deduce_sequence</ span ></ code ></ a ></ li >
</ ul ></ div >
</ div >
< table xmlns:rev = "http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width = "100%" >< tr >
< td align = "left" ></ td >
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< td align = "right" >< small > Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
Schwinger</ small ></ td >
2007-02-15 23:11:24 +00:00
</ tr ></ table >
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