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digitalmars.D.bugs - [Issue 12311] New: Use `opCmp` for equality check if defined

reply d-bugmail puremagic.com writes:
https://d.puremagic.com/issues/show_bug.cgi?id=12311

           Summary: Use `opCmp` for equality check if defined
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: verylonglogin.reg gmail.com


--- Comment #0 from Denis Shelomovskij <verylonglogin.reg gmail.com> 2014-03-07
13:28:20 MSK ---
As `opCmp` is enough to check for equality a compiler could use it:
---
struct S
{ int opCmp(const S) const { return 1; } }

class C
{ override int opCmp(Object) { return 0; } }

void main()
{
    assert(S.init != S.init);
    assert(new C == new C);
}
---

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parent d-bugmail puremagic.com writes:
https://d.puremagic.com/issues/show_bug.cgi?id=12311



--- Comment #1 from Denis Shelomovskij <verylonglogin.reg gmail.com> 2014-03-07
13:28:50 MSK ---
With such behaviour we can change associative arrays to use `equals` instead of
`compare` [1] without any breaking changes.

[1] https://github.com/D-Programming-Language/druntime/pull/522

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