[Issue 11422] New: std.array.assocArray with const tuple values

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=11422

           Summary: std.array.assocArray with const tuple values
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2013-11-02 16:07:04 PDT ---
I think both cases need to be accepted or both need to be refused:


import std.array: assocArray;
import std.range: zip;
import std.typecons: Tuple;
void main() {
    auto keys = [10, 20, 30];
    const vals1 = [1, 2, 3];
    //keys.zip(vals1).assocArray; // OK
    alias R = Tuple!int;
    const vals2 = [R(1), R(2), R(3)];
    keys.zip(vals2).assocArray; // Error
}


dmd 2.064beta4 gives:

...\dmd2\src\phobos\std\array.d(249): Error: template
std.typecons.Tuple!int.Tuple.opAssign does not match any function template
declaration. Candidates are:
...\dmd2\src\phobos\std\typecons.d(504):       
std.typecons.Tuple!int.Tuple.opAssign(R)(auto ref R rhs) if
(areCompatibleTuples!(typeof(this), R, "="))
...\dmd2\src\phobos\std\array.d(249): Error: template
std.typecons.Tuple!int.Tuple.opAssign(R)(auto ref R rhs) if
(areCompatibleTuples!(typeof(this), R, "=")) cannot deduce template function
from argument types !()(const(Tuple!int)) const
test.d(10): Error: template instance std.array.assocArray!(Zip!(int[],
const(Tuple!int)[])) error instantiating

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