[#BloombergLP-bbldc-BasicIsda11]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bbldc.adoc[bbldc]::BasicIsda11
:relfileprefix: ../../
:mrdocs:

This `struct` provides a namespace for a suite of pure functions that compute values based on dates according to the ISDA 1/1 day‐count convention.

== Synopsis

Declared in `<bbldc_basicisda11.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct BasicIsda11;
----

== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bbldc/BasicIsda11/daysDiff.adoc[`daysDiff`] 
| Return the (signed) number of days between the specified `beginDate` and `endDate` according to the ISDA 1/1 day‐count convention. If `beginDate < endDate`, then the result is one. If `beginDate == endDate`, then the result is zero. Note that reversing the order of `beginDate` and `endDate` negates the result.
| xref:BloombergLP/bbldc/BasicIsda11/yearsDiff.adoc[`yearsDiff`] 
| Return the (signed fractional) number of years between the specified `beginDate` and `endDate` according to the ISDA 1/1 day‐count convention. If `beginDate < endDate`, then the result is one. If `beginDate == endDate`, then the result is zero. Note that reversing the order of `beginDate` and `endDate` negates the result; specifically, `|yearsDiff(b, e) + yearsDiff(e, b)| <= 1.0e‐15` for all dates `b` and `e`.
|===



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