[#BloombergLP-bslfmt-FormatSpecificationParser-numFillerCharacters]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslfmt.adoc[bslfmt]::xref:BloombergLP/bslfmt/FormatSpecificationParser.adoc[FormatSpecificationParser]::numFillerCharacters
:relfileprefix: ../../../
:mrdocs:

Return the size of the stored filler string.

== Synopsis

Declared in `<bslfmt_formatspecificationparser.h>`

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

== Description

If `parse` has not previously been called throw a `format_error` exception.

== Return Value

number of characters in the stored filler string


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