r15982: Script Engine Update

[Epoque 147]

Summary

As of r15982, variables used within scripts can be directly assigned to as you would using another programming language. That is to say, that the following set of predicates will work:

@i = 1;
@i++;
@i *= 2;
@i = @j = 1;
@i -= @j;

for( @i = 0; 10 > @i; @i++ ) { }
while( (@i += 1) < 20 ) { }

Support for all of the major operator methods have been included (+=, -=, /=, *= etc.) This announcement is to ensure that any and all problems encountered while using this method of accessing variables must be reported, along with any traces you can possibly provide (and a clear example of the script is appreciated.)

This comes as a secondary update to the scripting engine to unify the language to conform to standards set by other languages. The scripting engine now supports both the direct invocation of user-defined functions (r15979 and r15981) and variable access systems (r15982.)

Notes

• This does not affect previous scripts at all. The new engine converts patterns that match var = value; to set(var, value); for backwards compatibility.
  
• Testing was performed using all of the operator methods, and was tested using loops. However, nested operations have not yet been thoroughly tested.
  

[JayPee 76]

Super Like IT!

[Nameless2you 52]

Interesting..

[jTynne 193]

Finally! XD Thanks guys.

[Hiero 5]

Finally ! Thanks a lot.

[Erid 3]

Yeah, great news!, I don't know why, but this made me very happy, it always annoyed me having to use set.

[malufett 70]

makes life more easy!

thumbs up!

[Lemongrass 264]

and now please run a small script to replace the code within the npc folder, that would be awesome!

[Matheus 6]

That's a great news, congratulations !

[Lilith 153]

Thanks

[Zeromaru 0]

I think in line 1092 of script.c there is a mistake.

Edited April 27, 2012 by Zeromaru

[Epoque 147]

I think in line 1092 of script.c there is a mistake.

You're correct good sir. Thanks for pointing that out, wouldn't have seen it otherwise.

[Vianna 8]

You should keep the values returned by search_str("set"), search_str("callfunc") and search_str("getelementofarray") into global variables to avoid searching for them at every occurrence of assignment statements and user-defined function calls.

[Epoque 147]

You should keep the values returned by search_str("set"), search_str("callfunc") and search_str("getelementofarray") into global variables to avoid searching for them at every occurrence of assignment statements and user-defined function calls.

Indeed, this was something I brought up in the staff channel on IRC. I've been trying to collect a list of additional changes that need committing, and this is on the list. You have a keen eye, great minds think alike

[xRaisen 8]

Thanks! that will make our lives more easier.

P.S If you are not busy, try adding abs() also. So the unidentified groupranditem() will be reverted to its normal Ya know what has been broken down there.

[Epoque 147]

Update

It's important to note that r15998 appears to fix a long-standing issue that appears to have been present in rAthena for an extended period of time. For whatever reason, the instance variable storage system was not being initialised (thus instance variables were not being saved or recorded.) If anyone has any reports prior to r15998 of instance variables not working, please let me know. It baffled our team temporarily as to why this was the case in the source.

Thanks.

[Sneaky 47]

was looking forward to this, thanks <3 Love you, Love it!

[Emistry 1,890]

Wow...this is nice...xD

now Z3R0 wont be needed to worry of writing these in the scripts xD hahaha~

[rafoka 8]

Nice!

I always enjoyed this new-old way of scripting (More Like-C) from that mod-released in the old ea. Good job ...

[Ind 748]

the last known bug from this feature has been fixed in r16555. should you step by any bugs please step by our core bug tracker :3 thank you

[GM Will 11]

Nice.

[Swadon 4]

Great !

But how to call a function without using "callfunc", I have not found how to do it.

It does not work like that :

- script Test_Call_Function  -1,{

OnInit:
Test("Hello !");
end;
}

function script Test {

 announce getarg(0),bc_all;
 return;
}

Thank you for your help !

[Euphy 1,105]

@Swadon: The function needs to be loaded before it's called, so either move it before the script or place it in another script file altogether.

[Swadon 4]

Ooh, stupid error !

Thank you ! ..

[Brian 583]

Test("Hello !");

To call functions like that, you have to define the function within the npc object, not as a separate object. There's an example in trunk/doc/script_commands.txt

prontera,150,150,0	script	TestNPC	123,{
function MyAdd;

mes "Enter two numbers.";
next;
input [email protected];
input [email protected];
mes [email protected]+" + "[email protected]+" = "+MyAdd([email protected],[email protected];
close;

function MyAdd
{
	return getarg(0)+getarg(1);
}
}