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

This template determines if the specified `t&lowbar;PROTOTYPE` is a free (i&period;e&period;, non&hyphen;member) function pointer&period; `value` is defined as 1 if the specified `t&lowbar;PROTOTYPE` is a function pointer type, and a zero value otherwise&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 IsFunctionPointer
    : xref:bsl/integral_constant-02.adoc[bsl::integral&lowbar;constant&lt;bool, FunctionPointerTraits&lt;t&lowbar;PROTOTYPE&gt;&colon;&colon;IS&lowbar;FUNCTION&lowbar;POINTER&gt;]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/integral_constant-02.adoc[bsl::integral&lowbar;constant&lt;bool, FunctionPointerTraits&lt;t&lowbar;PROTOTYPE&gt;&colon;&colon;IS&lowbar;FUNCTION&lowbar;POINTER&gt;]`
| Metafunction representing a compile&hyphen;time constant of the specified (template parameter) `t&lowbar;TYPE` with the specified (template parameter) `t&lowbar;VALUE`&period;
|===

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:bsl/integral_constant-02/type.adoc[`type`] 
| Alias for this `integral&lowbar;constant` specialization&period;
| xref:bsl/integral_constant-02/value_type.adoc[`value&lowbar;type`] 
| 
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:bsl/integral_constant-02/operator_call.adoc[`operator()`] 
| Return a copy of the template argument `t&lowbar;VALUE`&period;
| xref:bsl/integral_constant-02/2conversion.adoc[`operator value&lowbar;type`] 
| 
|===


== Static Data Members

[cols="1"]
|===
| Name
| xref:bsl/integral_constant-02/value.adoc[`value`] 
|===



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