Re: Why is Function Defined Twice?

[Simon Wright <simon@pushface.org>]

"Jason C. Wells" <jcw@highperformance.net> writes:

> I don't understand why the function ASUM is defined twice in the
> following example.  Which version gets called when I use ASUM?  How does
> Ada determine precedence on which gets called?  What is the big concept
> that I need to associate with this practice so I can go do more studying?

It depends on how you call them.

You might get more enlightenment from looking at the package spec? but
-- at a guess --

>    function ASUM (
>      N    : Natural;
>      X    : Vector_Type;
>      INCX : Natural
>    ) return Float_Type'Base is

processes the first N elements of X using (an increment?? every
INCX'th element??) and will be called when you say

  F := ASUM (5, V, 2);

>    function ASUM (X : Vector_Type) return Float_Type'Base is

processes every element of X with an increment of 1 and will be called
when you say

  F := ASUM (V);