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

This class gives information about the specified `t_PROTOTYPE`. The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`.

== Synopsis

Declared in `<bslmf_functionpointertraits.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_PROTOTYPE>
struct FunctionPointerTraits;
----

== Enums

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/FunctionPointerTraits-04/_04enum.adoc[`Unnamed enum`] 
| Compile‐time flag indicating whether `t_PROTOTYPE` is a function pointer.
|===


== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/FunctionPointerTraits-06.adoc[`FunctionPointerTraits<t_PROTOTYPE volatile*>`] 
| This class gives information about the specified `t_PROTOTYPE`. The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`.
| xref:BloombergLP/bslmf/FunctionPointerTraits-019.adoc[`FunctionPointerTraits<t_PROTOTYPE const*>`] 
| This class gives information about the specified `t_PROTOTYPE`. The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`.
| xref:BloombergLP/bslmf/FunctionPointerTraits-001.adoc[`FunctionPointerTraits<t_PROTOTYPE const volatile*>`] 
| This class gives information about the specified `t_PROTOTYPE`. The general definition gives no information, but specializations for function pointers types define nested types `ResultType`, `ArgumentList`, and `Linkage`.
| xref:BloombergLP/bslmf/FunctionPointerTraits-01a.adoc[`FunctionPointerTraits<t_BSLMF_RETURN(*)(t_ARGS...) noexcept>`] 
| Specialization for function pointers that return `t_BSLMF_RETURN` and accept a fixed number of arguments
| xref:BloombergLP/bslmf/FunctionPointerTraits-00b.adoc[`FunctionPointerTraits<t_BSLMF_RETURN(*)(t_ARGS..., ...) noexcept>`] 
| Specialization for function pointers that return `t_BSLMF_RETURN` and accept variable (C‐style varargs) number of arguments
|===


== Derived Classes

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


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