• via Digitalmars-d-bugs (32/33) Jul 21 2017 https://issues.dlang.org/show_bug.cgi?id=17674

via Digitalmars-d-bugs <digitalmars-d-bugs puremagic.com> writes:

https://issues.dlang.org/show_bug.cgi?id=17674

          Issue ID: 17674
           Summary: [REG 2.064] Simultaneous opBinary and opBinaryRight is
                    not rejected
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: accepts-invalid
          Severity: regression
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: dlang-bugzilla thecybershadow.net

The example from issue 10478 now compiles, even though it shouldn't:

struct S1
{
    int opBinary(string op)(S2 other) { return 3; }
}

struct S2
{
    int opBinaryRight(string op)(S1 other) { return 4; }
}

void main()
{
    auto x = S1.init + S2.init;
}

The spec on binary operator overloading (
https://dlang.org/spec/operatoroverloading.html#binary ) states:

 It is an error for both to equally match. 

Introduced in https://github.com/dlang/dmd/pull/1409.

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