[Issue 12889] New: std.algorithm remove is broken for arrays of arrays

via Digitalmars-d-bugs digitalmars-d-bugs at puremagic.com
Wed Jun 11 08:03:13 PDT 2014


https://issues.dlang.org/show_bug.cgi?id=12889

          Issue ID: 12889
           Summary: std.algorithm remove is broken for arrays of arrays
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: major
          Priority: P1
         Component: Phobos
          Assignee: nobody at puremagic.com
          Reporter: safety0ff.bugz at gmail.com

Trying to remove anything but the a single element from the front of a
multidimensional array will cause a run time error.
This causes bugs in phobos functions who depend on remove such as
replaceInPlace.

Code:
import std.typecons;
import std.algorithm;
import std.stdio : writeln;
void main()
{
    // note: dimension doesn't matter
    int[1][] arr = [[0], [1], [2], [3], [4], [5], [6]];
    size_t from = 1;  // from is inclusive
    size_t to = 2;    // to is exclusive
     //arr = remove(arr, tuple(from,to)); // object.Error: overlapping array
copy 
    //foreach (i; from .. to)    arr = remove(arr, i); // object.Error:
overlapping array copy 
    arr = remove(arr, 0); // Ok!
    //arr = remove(arr, 1); //  object.Error: overlapping array copy
    // even removing nothing is broken:
    //arr = remove(arr, tuple(0,0)); // object.Error: overlapping array copy 
    writeln(arr);
}

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