[Issue 12529] New: Function/delegate type alias picks up @safe attribute from surrounding scope

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12529

           Summary: Function/delegate type alias picks up @safe attribute
                    from surrounding scope
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: bugzilla at kyllingen.net


--- Comment #0 from Lars T. Kyllingstad <bugzilla at kyllingen.net> 2014-04-06 11:48:27 PDT ---
Consider:

    @safe:
    alias F = void function();

This wrongly makes F an alias of "void function() @safe" rather than "void
function()".

Here is a test case which should compile, but which fails to do so:

    void foo() { }
    @safe:
    alias F = void function();
    @trusted void bar(F f) { f(); }
    void main() { bar(&foo); }

DMD says:

bug.d(6): Error: function bug.bar (void function() @safe f) is not callable
using argument types (void function())

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