[#BloombergLP-bslfmt-basic_format_arg-05-2conversion]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslfmt.adoc[bslfmt]::xref:BloombergLP/bslfmt/basic_format_arg-05.adoc[basic_format_arg<basic_format_context<t_OUT, t_CHAR>>]::operator xref:BloombergLP/bslfmt/basic_format_arg-05/BoolType.adoc[BoolType]
:relfileprefix: ../../../
:mrdocs:

Return whether this object holds a value.

== Synopsis

Declared in `<bslfmt_format_arg.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
operator xref:BloombergLP/bslfmt/basic_format_arg-05/BoolType.adoc[BoolType]() const noexcept;
----


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