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Galaxy Scripting

  • 4 posts
    vjeux Author Avatar of vjeux
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    vjeux
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    #1 Mar 08, 2010 at 13:07 UTC - 0 likes

    No dynamic allocation

    Can't seem to allocate new objects on the fly. There is no such things as malloc or new.

    I tried to get the pointer from a local variable but it gets killed when leaving the function:

    struct test {
  int i;
  int j;
};

test* createTest() {
  test o;
  o.i = 5;
  o.j = 1;
  return &o;
}

void Init() {
  test *object = createTest();
  object->i;
  // Invalid stack pointer
}

    No Object Copy

    If you want to copy an object, you have to do it by hand.

    test A = createTest();
test B = A;
// This field is not a member of the struct type
test *B = A;
// Bulk copy not supported.

    Casting

    There is no casting allowed

    void *a = createTest();
// No implicit cast allowed
void *a = (void *)(createTest());
// Syntax Error: No explicit cast allowed
    Last edited Mar 08, 2010 by vjeux
    ckknight Author Avatar of ckknight
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    #2 Mar 08, 2010 at 19:44 UTC - 0 likes

    If returning &o makes it so the stack pointer is invalid, I'm not sure how you'd properly return a pointer without something like malloc.

    computerpunk Author Avatar of computerpunk
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    #3 Mar 12, 2010 at 00:40 UTC - 0 likes

    I see lots of "function" definitions of actual function return types. Is it a general (void *) handle or some special type?

    vjeux Author Avatar of vjeux
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    vjeux
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    #4 Mar 12, 2010 at 08:38 UTC - 0 likes

    As there is no type casting, you can't use void*.

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