[#BloombergLP-bslfmt-Format_String_TestUpdater]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslfmt.adoc[bslfmt]::Format_String_TestUpdater
:relfileprefix: ../../
:mrdocs:

This is a component‐private type which enables test drivers to work around the compile‐time restrictions in `basic_format_string` construction.

== Synopsis

Declared in `<bslfmt_format_string.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_CHAR>
struct Format_String_TestUpdater;
----

== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslfmt/Format_String_TestUpdater/update-0a.adoc[`update`] 
| Update the string contained in the specified `out` to the specified `value`.
|===



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