• d-bugmail puremagic.com (38/38) Sep 05 2012 http://d.puremagic.com/issues/show_bug.cgi?id=8625

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=8625

           Summary: foreach doesn't do implicit conversions on associative
                    arrays and opApply
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: nilsbossung googlemail.com


--- Comment #0 from Nils <nilsbossung googlemail.com> 2012-09-05 20:41:43 PDT
---
This should compile:

void main() {
    int[int] aa;
    foreach(long k, long v; aa) {} // fails on both k and v
        // test.d(3): Error: foreach: index must be type int, not long
        // test.d(3): Error: foreach: value must be type int, not long

    static struct OpApply {
        int opApply(int delegate(int)) {return 0;}
    }
    foreach(long x; OpApply()) {} // fails
        // test.d(10): Error: cannot uniquely infer foreach argument types

    // In contrast, it does work on plain arrays and ranges:

    int[] a;
    foreach(long x; a) {} // ok

    static struct Range {
         property bool empty() {return false;}
         property int front() {return 0;}
        void popFront() {}
    }
    foreach(long x; Range()) {} // ok
}

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