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

Check whether the specified `id` is in range of number of arguments and enter manual indexing mode. Throw `bslfmt::format_error` if this object has already entered automatic indexing mode.

== Synopsis

Declared in `<bslfmt_mockparsecontext.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
void
check_arg_id(size_t id);
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#