[Issue 4286] New: Wrong error line number and more with schwartzSort

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4286

           Summary: Wrong error line number and more with schwartzSort
           Product: D
           Version: future
          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 2010-06-06 07:40:55 PDT ---
This is D2 code, I don't understand this bug:


import std.typecons: tuple, Tuple;
import std.algorithm: schwartzSort;

void foo(int N)(char[] txt) {
    int[char[N]] aa;
    foreach (i; 0 .. txt.length + 1 - N) {
        char[N] key = txt[i .. i + N];
        aa[key]++;
    }

    alias Tuple!(char[N], "key", int, "value") Pair;
    Pair[] pairs;
    foreach (key, value; aa)
        pairs ~= Pair(key, value);

    schwartzSort!((p){ return tuple(p.value, p.key); })(pairs);
}

void main() {
    char[] txt = cast(char[])("this is just a test".dup);
    foo!(1)(txt);
    foo!(2)(txt);
}


DMD v2.046 prints at compile-time:

test.d(4061): Error: function test.foo!(1).foo.schwartzSort!(__dgliteral1,"a <
b",cast(SwapStrategy)0,Tuple!(char[2u],"key",int,"value")[]).schwartzSort is a
nested function and cannot be accessed from foo


This work-around seems to fix the program:
schwartzSort!((Pair p){ return tuple(p.value, p.key); })(pairs);


Also note the wrong line number, this is why I have tagged this as DMD bug
instead of Phobos problem.

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