[Issue 12421] New: Allow simpler syntax for lambda template declarations

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12421

           Summary: Allow simpler syntax for lambda template declarations
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: andrej.mitrovich at gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2014-03-20 03:23:28 PDT ---
-----
void main()
{
    import std.algorithm;
    import std.traits;

    {
        static auto notEmpty(Arr)(Arr arr) { return !arr.filter!(a => a >
0.0).empty; }
        assert(notEmpty([0.0, 0.0, 0.1]));
    }

    {
        // simpler syntax should be supported
        alias notEmpty = a => a.filter!(b => b > 0.0).empty;
        assert(notEmpty([0.0, 0.0, 0.1]));
    }
}
-----

Note how much code has to be written for a "throwaway" inline function
definition in the first case. This could be simplified by supporting the second
syntax.

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