[#BloombergLP-bdlt-Calendar_BusinessDayConstIter-operator_dec]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/Calendar_BusinessDayConstIter.adoc[Calendar_BusinessDayConstIter]::operator‐‐
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Regress this iterator to refer to the previous business day in the associated calendar, and return a reference providing modifiable access to this object. The behavior is undefined unless, on entry, this iterator references a valid business day that is not the first business day for the associated calendar.

== Synopsis

Declared in `<bdlt_calendar.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:BloombergLP/bdlt/Calendar_BusinessDayConstIter.adoc[Calendar_BusinessDayConstIter]&
operator‐‐();
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