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

Format the specified `args` according to the specification given by the specified `fmtStr` in the locale of the specified `loc`, 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::string` object. Note that this overload is provided in addition to the overloads in the standard library.

== Synopsis

Declared in `<bslfmt_format.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
vformat_to(
    xref:bsl/string.adoc[string]* out,
    std::locale const& loc,
    std::string_view fmtStr,
    std::format_args args);
----


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