Lambda evaluation - postfix or prefix?
jjb at google.com
Thu Jan 28 13:44:03 PST 2010
On Wed, Jan 27, 2010 at 7:09 PM, Neal Gafter <neal at gafter.com> wrote:
> On Wed, Jan 27, 2010 at 5:19 PM, Doug Lea <dl at cs.oswego.edu> wrote:
> > Joshua Bloch wrote:
> >> Along these lines I suggested * as a prefix operator, which is familiar
> >> function pointers in C and C++. Doug Lea likes this.
> > I admit that I do like this. The correspondence
> > to function pointers is close enough that inventing a new
> > syntactic form requires a good argument for
> > ignoring historical precedent. Which I haven't seen.
> > (although I have not had enough time to read these
> > recent discussions so maybe I missed it.)
> There isn't enough information in this thread to guess what syntax is
> proposed. Can you please rewrite the following example using the
> proposed syntax?
> #int(String)(throws IOException) foo = #(String filename)(3);
> int result = foo!("bar);
Presumably a close-quote after the bar?
The proposed syntax is something along the lines of:
int result = *foo("bar");
P.S. I think that what we've been calling a postfix operator is more of an
infix operator in that it separates the lambda from its argument list.
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