[#BloombergLP-bslmf-MetaInt-0b]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslmf.adoc[bslmf]::xref:BloombergLP/bslmf/MetaInt-07.adoc[MetaInt]<1>
:relfileprefix: ../../
:mrdocs:

This specialization of `MetaInt` has a `VAL` of one and is convertible to and from `bsl::true_type`.

== Synopsis

Declared in `<bslmf_metaint.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<>
struct xref:BloombergLP/bslmf/MetaInt-07.adoc[MetaInt]<1>
    : xref:bsl/true_type.adoc[bsl::true_type]
----

== Base Classes

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

== Type Aliases

[cols="1"]
|===
| Name
| xref:BloombergLP/bslmf/MetaInt-0b/Tag-0d.adoc[`Tag`] 
| xref:BloombergLP/bslmf/MetaInt-0b/Type.adoc[`Type`] 
|===


== Enums

[cols="1"]
|===
| Name
| xref:BloombergLP/bslmf/MetaInt-0b/_04enum.adoc[`Unnamed enum`] 
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/MetaInt-0b/2constructor-07.adoc[`MetaInt`]         [.small]#[constructor]#
| Does nothing (`MetaInt` is stateless).
| xref:BloombergLP/bslmf/MetaInt-0b/2constructor-04.adoc[`MetaInt`]         [.small]#[constructor]#
| Convert from a `bsl::true_type`.
| xref:BloombergLP/bslmf/MetaInt-0b/2conversion.adoc[`operator bool`] 
| Return `true`. (This operator is conversion operator to `bool`.)
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslmf/MetaInt-0b/tag-01.adoc[`tag`] 
| Declared but not defined. Meta‐function use only. The tag can be used to recover meta‐information from an expression. Example: `sizeof(f(expr).tag())` returns a different compile‐time value depending on the type of the result of calling the `f` function but does not actually call the `f` function or the `tag` method at run‐time. Note that `f(expr)::VALUE` or `sizeof(f(expr)::Type)` would be ill‐formed and that `f(expr).value` is not a compile‐time expression.
|===



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