[#BloombergLP-bslalg-TypeTraitHasTrivialDefaultConstructor]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslalg.adoc[bslalg]::TypeTraitHasTrivialDefaultConstructor
:relfileprefix: ../../
:mrdocs:

A `TYPE` with this trait has a trivial default constructor. Objects of a type with this trait can be default‐initialized by simply writing zeros into the memory footprint of the object. Although it is possible for such a type not to be bitwise copyable, undefined behavior may result if this trait is assigned to such a type. (See the description of `TypeTraitBitwiseCopyable`.)

== Synopsis

Declared in `<bslalg_typetraithastrivialdefaultconstructor.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct TypeTraitHasTrivialDefaultConstructor;
----

== Types

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslalg/TypeTraitHasTrivialDefaultConstructor/Metafunction.adoc[`Metafunction`] 
| Metafunction that evaluates to `HasTrivialDefaultConstructor<TYPE>::type`.
| xref:BloombergLP/bslalg/TypeTraitHasTrivialDefaultConstructor/NestedTraitDeclaration.adoc[`NestedTraitDeclaration`] 
| This class template ties the `bslalg::TypeTraitHasTrivialDefaultConstructor` trait tag to the `bsl::is_trivially_default_constructible` trait metafunction.
|===



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