Cobra Forums

gauthier wrote:That's nice!

I like the sig declaration very much but I can't say the same for the do keyword, however I can't come with something I like better according to the whitespace orientation of the language.

Could you expand on other syntax you considered and dismissed? anyone have better looking idea for the syntax?

.foo(x, do(a as int, b as int) = a + b)
# general form:
... do(<args>) = <expr>

.foo(x, do(a, b) = a + b)

gauthier wrote:How do you distinguish method call from method reference passing when method has no parameter? some of theses method may return closure as well...

obj.foo.bar

gauthier wrote:As for passing multiple closures, the do blocks feels more natural/readable than just the indentation to me, I'm looking to use this even for single closure when it will be supported.

Chuck wrote:-- Added anonymous methods, also known as closures.

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// D

void globalFunction()
{
   int x = 0;  // local variable
   void NAMED_localFunction()
   {
       printf("I can access x, I'm a closure, see: %d", x);
   }
   NAMED_localFunction();
}


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-- Haskell
globalFunction =
   let
      x = 0
      NAMED_localFunction = print "I can access x, I'm a closure, see: " ++ show x
   in
      NAMED_localFunction


Code: Select all

// D

void globalFunction()
{
   int x = 0;  // local variable
   static void NAMED_nonClosure_localFunction() // in D static makes the local function a non-closure
   {
       printf("I'm not a closure. Trying to access x woulb be a failure, as this function does not enclose its scope!");
   }
   NAMED_nonClosure_localFunction();
}


class Test
    def main is shared
        accumulator = 0
        if true
            .doSomething("a".toLower.toUpper, do(i as int))
                accumulator = accumulator + i
            .doSomething("b", nil)
            print accumulator


    def doSomething(a, b as Action<of int>?) is shared
        print a
        if b
            b(1)

Code: Select all

test.cobra(5): error: test.cobra(5,51): error: Expecting a statement instead of extra indentation. One indent level is 4 spaces or 1 tab with display width of 4.
Compilation failed - 1 error, 0 warnings

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Action<int> a = i => Console.WriteLine(i);
a(1);