[#BloombergLP-bslalg-NumericFormatterUtil-PrecisionMaxBufferLength-03]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslalg.adoc[bslalg]::xref:BloombergLP/bslalg/NumericFormatterUtil.adoc[NumericFormatterUtil]::PrecisionMaxBufferLength
:relfileprefix: ../../../
:mrdocs:

Metafunction for maximum `toChars` buffer size given format and precision.

== Synopsis

Declared in `<bslalg_numericformatterutil.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_FLOATING>
struct PrecisionMaxBufferLength;
----

== Description

Metafunction that provides access to `float` and `double` variation of the `value` class method that returns the maximum required buffer size for the textual representation (`toChars`) for a specified format and precision value. The metafunction provides a single class method `value` with the signature `size_t value(Format format, int precision)` that returns the maximum required buffer size for the specified `format` and `precision`.

== Specializations

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bslalg/NumericFormatterUtil/PrecisionMaxBufferLength-0d.adoc[`PrecisionMaxBufferLength<double>`] 
| `PrecisionMaxBufferLength` specialization for `double`.
| xref:BloombergLP/bslalg/NumericFormatterUtil/PrecisionMaxBufferLength-04.adoc[`PrecisionMaxBufferLength<float>`] 
| `PrecisionMaxBufferLength` specialization for `float`.
|===



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