[ITK-users] Numeric traits

[Jim Miller]

This statement assigns the value of 1 to variable "label".  The value of
NumericTraits<PixelType>::One is specific to the datatype PixelType.  For
instance, For an integer type, NumericTraits<PixelType>::One will be 1. For
a floating point type, it will be 1.0.

Techniques like this are used in Generic Programming to initialize or
assign a variable a value of the appropriate type (and avoid compiler
warnings and performance associated with casting between types).


On Fri, Oct 24, 2014 at 4:32 AM, Abdul Abdul <abdul.sw84 at gmail.com> wrote:

> Hello,
>
> I came across the following statement:
>
> PixelType label = itk::NumericTraits<PixelType>::One;
>
> It seems to be related to numric traits, which I have visited its
> documentation website, here
> <http://www.itk.org/Doxygen/html/classitk_1_1NumericTraits.html>, but,
> yet, didn't get the idea of the statement.
>
> Can you kindly just describe to me what the statement means?
>
> Thanks.
>
>
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