[#bsl-is_same-051]
= xref:bsl.adoc[bsl]::is_same
:relfileprefix: ../
:mrdocs:

This `struct` template provides a meta‐function to determine whether the (template parameter) `t_TYPE1` and the (template parameter) `t_TYPE2` are the same. This generic default template derives from `bsl::false_type`. A template specialization is provided (below) that derives from `bsl::true_type`.

== Synopsis

Declared in `<bslmf_issame.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class t_TYPE1,
    class t_TYPE2>
struct is_same
    : xref:bsl/false_type.adoc[false_type]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/false_type.adoc[false_type]`
| Metafunction representing the boolean constant `false`.
|===

== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:bsl/is_same-05e.adoc[`is_same<t_TYPE, t_TYPE>`] 
| This partial specialization of `is_same` derives from `bsl::true_type` for when the (template parameter) types are the same.
|===


== Derived Classes

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslstl/Variant_IsSameReturnType-08.adoc[`Variant_IsSameReturnType<t_RET, t_VISITOR, t_VARIANT, 0>`] 
| 
|===


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