[Issue 14600] Lambda with body allowed as template alias argument

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14600

Ketmar Dark <ketmar at ketmar.no-ip.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Hardware|x86_64                      |All
                 OS|Windows                     |All

--- Comment #1 from Ketmar Dark <ketmar at ketmar.no-ip.org> ---
it's actually a grammar issue. what `() => { writeln("testing"); }` does is
returns `void delegate () { writeln("testing"); }`.

i.e. `=> { writeln("testing"); }` is correctly parsed as *expression* which
returns delegate.

another thing is that compiler doesn't emit warnings by default. compiling the
code with "-w" flag gives this message:

Warning: calling z01.main.__lambda1 without side effects discards return value
of type void function() @safe, prepend a cast(void) if intentional

i think that the report can be closed as "not-a-bug". we'd better spam bugzilla
with "make warnings opt-out instead of opt-in" requests. ;-)

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