[Issue 12434] New: std.algorithm.sum of immutable array too

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12434

           Summary: std.algorithm.sum of immutable array too
           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 2014-03-21 12:00:30 PDT ---
void main() {
    import std.algorithm: sum, map;
    auto a1 = [10, 20];
    auto t1 = sum(a1);             // OK
    immutable a2 = [10, 20];
    auto t2 = sum(a2);             // Error
    auto t3 = a2.map!(x => x).sum; // Error
}


dmd 2.066alpha:


...\dmd2\src\phobos\std\algorithm.d(1087,15): Error: template std.algorithm.sum
cannot deduce function from argument types !()(immutable(int)[],
immutable(int)), candidates are:
...\dmd2\src\phobos\std\algorithm.d(1079,6):        std.algorithm.sum(R)(R r)
if (isInputRange!R && !isInfinite!R && is(typeof(r.front + r.front)))
...\dmd2\src\phobos\std\algorithm.d(1090,6):        std.algorithm.sum(R, E)(R
r, E seed) if (isInputRange!R && !isInfinite!R && is(typeof(seed = seed +
r.front)))
test.d(6,18): Error: template instance std.algorithm.sum!(immutable(int)[])
error instantiating
...\dmd2\src\phobos\std\algorithm.d(1087,15): Error: template std.algorithm.sum
cannot deduce function from argument types !()(MapResult!(__lambda1,
immutable(int)[]), immutable(int)), candidates are:
...\dmd2\src\phobos\std\algorithm.d(1079,6):        std.algorithm.sum(R)(R r)
if (isInputRange!R && !isInfinite!R && is(typeof(r.front + r.front)))
...\dmd2\src\phobos\std\algorithm.d(1090,6):        std.algorithm.sum(R, E)(R
r, E seed) if (isInputRange!R && !isInfinite!R && is(typeof(seed = seed +
r.front)))
test.d(7,30): Error: template instance std.algorithm.sum!(MapResult!(__lambda1,
immutable(int)[])) error instantiating

-- 
Configure issuemail: https://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------