[Issue 4803] New: std.range.chain with const string arguments

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4803

           Summary: std.range.chain with const string arguments
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2010-09-03 09:53:22 PDT ---
A problem found by Pelle Mansson:


import std.range: chain;
void main() {
  const string s = "hello";
  auto r = chain(s, s);
}


Compiled with dmd 2.048:

...\dmd\src\phobos\std\range.d(1162): Error: can only initialize const member
_field_field_0 inside constructor
...\dmd\src\phobos\std\range.d(1162): Error: can only initialize const member
_field_field_1 inside constructor


I think a chain() has to work with const strings too (the items need to be
const if one of the iterables given to chain has const items).

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