[Issue 7176] New: Lambda => syntax for function and methods too

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7176

           Summary: Lambda => syntax for function and methods too
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2011-12-28 05:11:07 PST ---
(From an idea of Timon Gehr)

I think extending the applicability of the new lambda syntax to free
functions/methods is a nice idea, to shorten tiny functions/methods, that are
common enough:


struct C {
    int x;
    int getX() => x;
    int sqrX() => x ^^ 2;
}


Some examples from other languages:

A function to compute the arithmetic mean in Scala 2.7:

def mean(s: Seq[Int]) = s.foldLeft(0)(_+_) / s.size


>From the Ada 2012 changes:
http://www.disca.upv.es/jorge/ae2010/slides/05-3_Language_Tech_Schonberg_Towards_Ada_2012.pdf

> To simplify the writing of pre/postconditions and predicates, allow parametrized expressions (aka function bodies in package specs):

function Cube (X : integer) is (X ** 3);

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