// Define a function signature for the function pointer
funcdef bool CALLBACK(int, int);
// An example function that to use this
void main()
{
// Declare a function pointer, and set it
// to point to the myCompare function.
CALLBACK @func = @myCompare;
// The function pointer can be compared with the 'is' operator
if( func is null )
{
print("The function pointer is null\n");
return;
}
// Call the function through the pointer, just as if it was a normal function
if( func(1, 2) )
{
print("The function returned true\n");
}
else
{
print("The function returned false\n");
}
}
// This function matches the CALLBACK definition, since it has
// the same return type and parameter types.
bool myCompare(int a, int b)
{
return a > b;
}
AngelScript function pointers now working
Hi guys,
I'd just wanted to let you know that I've finally been able to get to the point where function pointers are now fully working. I welcome those that have been waiting for this feature to give it a try so I can root out as many bugs as possible before I release version 2.18.2.
Here's a script example that shows the syntax for the function pointers:
Can this version of function pointers be used in import declarations? And similarly, will imports be treated as function pointers eventually?
I tried running the example in your post, on svn revision 561, and I get the error
script (5, 1) : INFO : Compiling void main()
script (9, 11) : ERR : Expected ';'
and line 9 is
CALLBACK @func = @myCompare;
Edit:
I ran the features test and everything passed...
Edit 2:
If the line
CALLBACK @func = @myCompare;
gets moved out side of main, it works.
script (5, 1) : INFO : Compiling void main()
script (9, 11) : ERR : Expected ';'
and line 9 is
CALLBACK @func = @myCompare;
Edit:
I ran the features test and everything passed...
Edit 2:
If the line
CALLBACK @func = @myCompare;
gets moved out side of main, it works.
Quote:Original post by Thy Reaper
Can this version of function pointers be used in import declarations? And similarly, will imports be treated as function pointers eventually?
Not yet, but the idea is that the imports will eventually be replaced with function pointers. Probably the CScriptBuilder will inherit the automatic binding of the imports as this is taken out of the core engine.
Quote:Original post by klusark
I tried running the example in your post, on svn revision 561, and I get the error
Just fixed this in revision 562. Thanks.
This is exactly why I want you guys to test this.
Regards,
Andreas
I got a crash! Here is the script. What I am doing is probably not intended :P
funcdef bool CALLBACK(int, int);funcdef bool CALLBACK3(CALLBACK @, CALLBACK @);funcdef bool CALLBACK2(CALLBACK @, CALLBACK3 @);void main(){ CALLBACK @func = @myCompare; CALLBACK2 @func2 = @test; CALLBACK3 @func3 = @test2; func2(func, func3);}bool test(CALLBACK @func, CALLBACK3 @func2){ if( func(1, 2) ) { print("The function returned true\n"); } else { print("The function returned false\n"); } return true;}bool test2(CALLBACK @func, CALLBACK @func2){ if( func(1, 2) ) { print("The function returned true\n"); } else { print("The function returned false\n"); } return true;}bool myCompare(int a, int b){ return a > b;}
Got another crash! I also tried using recursive functions, but that did not crash.
Edit: I dont think that is a function pointer bug. Here is another example that crashes
[Edited by - klusark on February 25, 2010 12:42:31 PM]
funcdef bool CALLBACK(int, int);class testclass{ CALLBACK @func; testclass() { @func = @myCompare; func(2,3); }}void main(){ testclass test;}bool myCompare(int a, int b){ testclass @testc = @testclass(); return a < b;}Edit: I dont think that is a function pointer bug. Here is another example that crashes
class testclass{ testclass() { myCompare(1,3); }}void main(){ testclass test;}bool myCompare(int a, int b){ testclass @testc = @testclass(); return a < b;}[Edited by - klusark on February 25, 2010 12:42:31 PM]
This topic is closed to new replies.
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