Thread: Idle curiosity: What is a Block?

  1. 10-17-2010 #1
    QuadraticFighte
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    Idle curiosity: What is a Block?

    I was on cdecl and I encountered a strange construct:
    Code:
    (double (^)(int , long long ))foo
    Apparently, it means "cast foo into block(int, long long) returning double."

    Then I googled "C blocks" and got a whole bunch of unrelated crap about scope and braces. Does anyone happen to know off hand what it is?
  2. 10-17-2010 #2
    Elysia
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    C++/CLI crap if I'm not mistaken. Cannot see the original source, though, so cannot confirm.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.
  3. 10-17-2010 #3
    QuadraticFighte
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    I remember the evil monstrosity which is Managed Visual C++:
    Code:
    array<MyClass ^> ^ MyArray = gcnew array<MyClass ^>(100);
    I am not sure if they are related. I sincerely hope not. I know they have something called a "top-level" whatever the hell that is. I wrote in that language for about three days and got bored quickly.
  4. 10-17-2010 #4
    Elysia
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    All I can say is that
    (double (^)(int , long long ))
    is not valid C.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.
  5. 10-17-2010 #5
    adeyblue
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    Its the declaration for a closure like construct in Apple versions of C/C++/Obj-C.
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