[Issue 16383] New: Algebraic visit does not match handlers to const classes

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16383

          Issue ID: 16383
           Summary: Algebraic visit does not match handlers to const
                    classes
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: cauterite at gmail.com

( https://dpaste.dzfl.pl/e8709d95a4dc )

import std.variant;
class C {};
void main() {
    alias T = Algebraic!(immutable(C));
    T.init.visit!(
        (immutable(C) _) => 0
    );
};
// error: "overload for type 'immutable(C)' hasn't been specified"

const/immutable just don't get matched to the handlers.
Probably related to bug 15615.

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