[#BloombergLP-bslfmt-vformat_to-06]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslfmt.adoc[bslfmt]::vformat_to
:relfileprefix: ../../
:mrdocs:

Format type‐erased `args` per `fmtStr` into the output iterator `out`.

== Synopsis

Declared in `<bslfmt_format_imp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_OUT>
t_OUT
vformat_to(
    t_OUT out,
    std::string_view fmtStr,
    xref:BloombergLP/bslfmt/format_args.adoc[format_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 output iterator given by the specified `out` parameter. In the event of an error the exception `format_error` is thrown. Behavior is undefined if `out` is not a valid output iterator.

== Return Value

output iterator after writing

== Parameters

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


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