[#BloombergLP-bslmf-FunctionPointerTraits-04]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmf.adoc[bslmf]::FunctionPointerTraits
:relfileprefix: ../../
:mrdocs:

This class gives information about the specified `t&lowbar;PROTOTYPE`&period; The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`&period;

== Synopsis

Declared in `&lt;bslmf&lowbar;functionpointertraits&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;class t&lowbar;PROTOTYPE&gt;
struct FunctionPointerTraits;
----

== Enums

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/FunctionPointerTraits-04/_04enum.adoc[`Unnamed enum`] 
| Compile&hyphen;time flag indicating whether `t&lowbar;PROTOTYPE` is a function pointer&period;
|===


== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/FunctionPointerTraits-06.adoc[`FunctionPointerTraits&lt;t&lowbar;PROTOTYPE volatile*&gt;`] 
| This class gives information about the specified `t&lowbar;PROTOTYPE`&period; The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`&period;
| xref:BloombergLP/bslmf/FunctionPointerTraits-019.adoc[`FunctionPointerTraits&lt;t&lowbar;PROTOTYPE const*&gt;`] 
| This class gives information about the specified `t&lowbar;PROTOTYPE`&period; The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`&period;
| xref:BloombergLP/bslmf/FunctionPointerTraits-001.adoc[`FunctionPointerTraits&lt;t&lowbar;PROTOTYPE const volatile*&gt;`] 
| This class gives information about the specified `t&lowbar;PROTOTYPE`&period; The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`&period;
| xref:BloombergLP/bslmf/FunctionPointerTraits-01a.adoc[`FunctionPointerTraits&lt;t&lowbar;BSLMF&lowbar;RETURN(*)(t&lowbar;ARGS&period;&period;&period;) noexcept&gt;`] 
| Specialization for function pointers that return `t&lowbar;BSLMF&lowbar;RETURN` and accept a fixed number of arguments
| xref:BloombergLP/bslmf/FunctionPointerTraits-00b.adoc[`FunctionPointerTraits&lt;t&lowbar;BSLMF&lowbar;RETURN(*)(t&lowbar;ARGS&period;&period;&period;, &period;&period;&period;) noexcept&gt;`] 
| Specialization for function pointers that return `t&lowbar;BSLMF&lowbar;RETURN` and accept variable (C&hyphen;style varargs) number of arguments
|===


== Derived Classes

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/FunctionPointerTraits-001.adoc[`FunctionPointerTraits&lt;t&lowbar;PROTOTYPE const volatile*&gt;`] 
| This class gives information about the specified `t&lowbar;PROTOTYPE`&period; The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`&period;
| xref:BloombergLP/bslmf/FunctionPointerTraits-019.adoc[`FunctionPointerTraits&lt;t&lowbar;PROTOTYPE const*&gt;`] 
| This class gives information about the specified `t&lowbar;PROTOTYPE`&period; The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`&period;
| xref:BloombergLP/bslmf/FunctionPointerTraits-06.adoc[`FunctionPointerTraits&lt;t&lowbar;PROTOTYPE volatile*&gt;`] 
| This class gives information about the specified `t&lowbar;PROTOTYPE`&period; The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`&period;
|===


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