[#bsl-vformat_to-0d]
= xref:bsl.adoc[bsl]::vformat_to
:relfileprefix: ../
:mrdocs:

Format type‐erased `args` per `fmtStr` into the string at `out`.

== Synopsis

Declared in `<bslfmt_format.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
vformat_to(
    xref:bsl/wstring.adoc[wstring]* out,
    std::wstring_view fmtStr,
    std::wformat_args args);
----

== Description

Format the specified `args` according to the specification given by the specified `fmtStr`, and write the result of this operation into the string addressed by the specified `out` parameter. In the event of an error throw the exception `format_error`. The behavior is undefined if `out` does not point to a valid `bsl::wstring` object. Note that this overload is provided in addition to the overloads in the standard library.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *out*
| address of the string receiving formatted characters
| *fmtStr*
| wide format string
| *args*
| type‐erased format arguments
|===


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