Preferred lambda syntax?
- by Roger Alsing
I'm playing around a bit with my own C like DSL grammar and would like some oppinions.
I've reserved the use of "(...)" for invocations. eg:
foo(1,2);
My grammar supports "trailing closures" , pretty much like Ruby's blocks that can be passed as the last argument of an invocation.
Currently my grammar support trailing closures like this:
foo(1,2)
{
//parameterless closure passed as the last argument to foo
}
or
foo(1,2) [x]
{
//closure with one argument (x) passed as the last argument to foo
print (x);
}
The reason why I use [args] instead of (args) is that (args) is ambigious:
foo(1,2) (x)
{
}
There is no way in this case to tell if foo expects 3 arguments (int,int,closure(x)) or if foo expects 2 arguments and returns a closure with one argument(int,int) - closure(x)
So thats pretty much the reason why I use [] as for now.
I could change this to something like:
foo(1,2) : (x)
{
}
or
foo(1,2) (x) ->
{
}
So the actual question is, what do you think looks best?
[...] is somewhat wrist unfriendly.
let x = [a,b]
{
}
Ideas?
