[#bsl-is_fundamental-09]
= xref:bsl.adoc[bsl]::is_fundamental
:relfileprefix: ../
:mrdocs:

This `struct` template implements a meta‐function for checking if a type is fundamental as defined in the C++11 standard [basic.fundamental]. Note that this is subtly differemt from `bslmf::IsFundamental`, which also returns `true_type` for references to fundamental types.

== Synopsis

Declared in `<bslmf_isfundamental.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_TYPE>
struct is_fundamental
    : xref:bsl/integral_constant-02.adoc[integral_constant<bool, is_arithmetic<t_TYPE>::value || is_void<t_TYPE>::value>]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/integral_constant-02.adoc[integral_constant<bool, is_arithmetic<t_TYPE>::value || is_void<t_TYPE>::value>]`
| Metafunction representing a compile‐time constant of the specified (template parameter) `t_TYPE` with the specified (template parameter) `t_VALUE`.
|===

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:bsl/integral_constant-02/type.adoc[`type`] 
| Alias for this `integral_constant` specialization.
| xref:bsl/integral_constant-02/value_type.adoc[`value_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_VALUE`.
| xref:bsl/integral_constant-02/2conversion.adoc[`operator value_type`] 
| 
|===


== Static Data Members

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


== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:bsl/is_fundamental-06.adoc[`is_fundamental<bsl::nullptr_t>`] 
| Explicit specialization to confirm that the type of `nullptr` is fundamental.
| xref:bsl/is_fundamental-05.adoc[`is_fundamental<bsl::nullptr_t volatile>`] 
| Explicit specialization to confirm that the type of `volatile nullptr` is fundamental.
| xref:bsl/is_fundamental-0f.adoc[`is_fundamental<bsl::nullptr_t const>`] 
| Explicit specialization to confirm that the type of `const nullptr` is fundamental.
| xref:bsl/is_fundamental-08.adoc[`is_fundamental<bsl::nullptr_t const volatile>`] 
| Explicit specialization to confirm that the type of `const volatile nullptr` is fundamental.
|===



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