why $ is need to access array [negative index]?
Ethan
gooberman at gmail.com
Fri Sep 18 22:01:56 UTC 2020
On Friday, 18 September 2020 at 21:06:22 UTC, mw wrote:
> You are indeed confused: the justification is either compiler
> writes that branching code, or user have to write it.
Good.
Let the user write it every time.
I don't want the compiler inserting branches in to my code simply
because of the essentially-never chance I might not want to put a
$ in front of a -<integer> statement for array access.
Further to write it every time: Write an array template. It's
simple. Here's the important parts, the rest isn't too difficult
to write from here
struct Array( T )
{
ref auto opIndex( int Index ) { if( Index < 0 ) Index =
slice.length + Index; return slice[ Index ]; }
T[] slice;
}
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