[#BloombergLP-bslfmt-StandardFormatSpecification-numFillerCharacters]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslfmt.adoc[bslfmt]::xref:BloombergLP/bslfmt/StandardFormatSpecification.adoc[StandardFormatSpecification]::numFillerCharacters
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Return the number of filler characters in the array returned by `filler()` unless the status is not `e_STATE_PARSED` or `e_STATE_POSTPROCESSED` in which case throw a `bsl::format_error` exception indicating that error.

== Synopsis

Declared in `<bslfmt_standardformatspecification.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
int
numFillerCharacters() const;
----


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