On Thu, 22 Sep 2011 18:59:31 -0400, Jason House <[email protected]>
wrote:
std.algorithm already introduces a sort of lambda syntax...
map!"a+b"(...) or map!q{a+b}(...)
If D is looking for its own style of short lambda, maybe implicit use of a and
b could be extended.
Candidates:
a+b
{a+b}
f{a+b}
auto{a+b}
auto a+b
Personally, I like the 2nd or 3rd one. The second is visually cleaner while the
3rd is easily parsed and feels very similar to q strings. I picked f because
that's frequently used to represent a function. x could work, but that's a
common variable name...
I like the idea, although 1,2,3 and 5 are too close to valid D syntax for my
comfort. We could borrow from Haskell:
\{a+b}
But I'd prefer not to have special syntax rules inside lambda blocks. (It
increases the cognitive load of D) So why not make it a statement? i.e.
\a+b;
then {} would only be for multi-statement or void functions:
\{a+b; return;}
What I worry about though is variable hijacking rules. e.g.
auto b = 5;
reduce!\a+b(map!\a+b([1,2,3,4));
