Re: foreach

[Steven Schveighoffer via Digitalmars-d]

On Thu, 12 Jun 2014 23:34:27 -0400, Manu via Digitalmars-d  
<digitalmars-d@puremagic.com> wrote:

On 13 June 2014 13:04, Daniel Murphy via Digitalmars-d
<digitalmars-d@puremagic.com> wrote:

i,j,k,etc work just fine.  Are you really nesting your loops that  
deeply?

Giving explicit names pollutes the local namespace, and the point
below about unreferenced variable warnings if you give explicit names.

i, j, k are traditionally loop variables. People have been using them for  
decades without conflicting their other variables.


The compiler's optimizer will do that just fine.

Not necessarily. The range might be a lib, and non-pure. The compiler
can't optimise/inline/eliminate the call if it doesn't have code.
In my experience this is common, I frequently wrap C api's in D-style
ranges. Potentially a lot of unnecessary calls to
C_API_GetItem(itemIndex).

2 options:

foreach(i; 0..r.walkLength)
{
}

or

while(!r.empty)
{
   r.popFront();
}

-Steve