[#BloombergLP-bdlt-Timetable-addTransition-08]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlt.adoc[bdlt]::xref:BloombergLP/bdlt/Timetable.adoc[Timetable]::addTransition
:relfileprefix: ../../../
:mrdocs:

Add or replace a transition at `datetime` with `code`.

== Synopsis

Declared in `<bdlt_timetable.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
addTransition(
    xref:BloombergLP/bdlt/Datetime.adoc[Datetime] const& datetime,
    int code);
----

== Description

Add a transition to this timetable at the specified `datetime` having the specified `code`. If `datetime` is already a transition point, replace the existing code with `code`. The addition of a transition, but not the replacement of the code of an existing transition, invalidates all iterators. The behavior is undefined unless `24 > datetime.hour()`, `datetime.date()` is within the valid range of this timetable, and `0 <= code || k_UNSET_TRANSITION_CODE == code`.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *datetime*
| datetime of the transition
| *code*
| transition code
|===


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