[Issue 5255] New: No foreach type inference with const

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5255

           Summary: No foreach type inference with const
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          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 2010-11-21 18:53:07 PST ---
If in a D2 program I have an array of mutable items I may want to iterate on
them but not modify them, so I'd like the iteration variable to be const. This
is possible, but it seems I lose type inference:


void main() {
    int[3] array; // not const
    // foreach (const x; array) {}                // Error
    // foreach (const auto x; array) {}           // Error
    // foreach (const(int) x; array) {}           // OK
    foreach (const(typeof(array[0])) x; array) {} // OK
}


What's the correct syntax to use?

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