• Kevin Bealer (6/6) Feb 17 2007 In 1.006, this seems to be allowed in a CTFE function:
• Walter Bright (2/10) Feb 17 2007 Both should work. Can you provide a complete example?
• Kevin Bealer (29/40) Feb 17 2007 Sure; in the 'bar' function below, the 'v += A.length' fails, but the

Kevin Bealer <kevinbealer gmail.com> writes:

In 1.006, this seems to be allowed in a CTFE function:

int q = A[i..j].length;
c += q;

But not this:

c += A[i..j].length;

Kevin

Walter Bright <newshound digitalmars.com> writes:

Kevin Bealer wrote:
 In 1.006, this seems to be allowed in a CTFE function:
 
 int q = A[i..j].length;
 c += q;
 
 But not this:
 
 c += A[i..j].length;

Both should work. Can you provide a complete example?

Kevin Bealer <kevinbealer gmail.com> writes:

Walter Bright wrote:
 Kevin Bealer wrote:
 In 1.006, this seems to be allowed in a CTFE function:

 int q = A[i..j].length;
 c += q;

 But not this:

 c += A[i..j].length;

 
 Both should work. Can you provide a complete example?

Sure; in the 'bar' function below, the 'v += A.length' fails, but the 
previous two lines work just fine as a replacement.  The failure is 
reported like this:

dmd -ofexa example.d
example.d(26): Error: cannot evaluate (bar)("a b c d") at compile time

Kevin


// -*- c++ -*-

import std.stdio;
import std.string;
import std.file;

// For DMD 1.006

int bar(char[] A)
{
     int v;

     for(int i = 0; i < A.length; i++) {
         if (A[i] != ' ') {
//          int q = A.length; // these work
//          v += q;
             v += A.length; // but this fails
         }
     }

     return v;
}

int main(char[][] args)
{
     const int foo = bar("a b c d");

     return 0;
}