[Issue 3607] Problems with struct opEquals and const

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=3607


Don <clugdbug at yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Regression(2.037) Problems  |Problems with struct
                   |with struct opEquals and    |opEquals and const
                   |const                       |
           Severity|regression                  |enhancement


--- Comment #2 from Don <clugdbug at yahoo.com.au> 2010-12-01 03:12:08 PST ---
The error message is correct, and the code compiles if you change the signature
to ref const Foo. The spec clearly states:
"If structs declare an opEquals member function, it should follow the following
form:

struct S {
    int opEquals(ref const S s) { ... }
}"


A key point in the forum discussion, which was missing from the bug report was
this comment:

> I think it should be allowed to have a signature like this:
> bool opEquals(T other) const
> inside T as long as T can be implicitly cast from const to mutable.

Changing to an enhancement request.

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