[Issue 13845] Error using alias of typeof(null) as unnamed lambda parameter

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13845

Peter Alexander <peter.alexander.au at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |peter.alexander.au at gmail.co
                   |                            |m
          Component|Phobos                      |DMD
            Summary|std.variant.Algebraic       |Error using alias of
                   |"__lambda2 is not a         |typeof(null) as unnamed
                   |function or delegate" when  |lambda parameter
                   |using alias vs. bare type   |
                 OS|Windows                     |All

--- Comment #1 from Peter Alexander <peter.alexander.au at gmail.com> ---
Reduced:

alias Null = typeof(null);
auto a = (int) => 0;           // ok
auto b = (typeof(null)) => 0;  // ok
auto c = (Null x) => 0;        // ok
auto d = (Null) => 0;          // error

Error: variable bug.d type void is inferred from initializer (Null) => 0, and
variables cannot be of type void

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