Complete Guide to SQF Operator Precedence

[ianbanks 30]

I've been digging a bit into the SQF grammar lately and came up with:

• A Complete Guide to SQF Operator Precedence
  

Hopefully if I've explained it all well enough you should be able to figure out where parenthesis are needed in every situation, without the usual trial and error and long learning process. ;)

[SilentSpike 84]

Saw this the other day, good job :)

[killzone_kid 1326]

Pfft, showoff! ;)

[MusTanG 21]

Thanks that was a good read

[R3vo 2652]

Very good guide, I was always wondering where to put parenthesis and where not.

BIS should put this guide in their next SITREP!

[Kingsley1997 39]

I wish SQF had the += -= and ++ and -- operators :(

[R3vo 2652]

I wish SQF had the += -= and ++ and -- operators :(

What would those do ?

[ianbanks 30]

What would those do ?

They would be short for:

_value = _value + _right

and:

_value = _value + 1

The += and -= version would be fairly easy to implement (they'd be a trivial change to the assignment part of the SQF grammar), but would still require changing the core language which BIS seems very reluctant to do (and for consistency you would want to introduce over a dozen other versions; *=, /=, &&=, etc).

The ++ and -- operators would probably need a language and parser rewrite, since SQF does not have the concept of an "assignable" expression (an assignable expression such as lvalues in C/C++ , which is where most people know ++ and -- from).

Assignment in SQF isn't an operator, it's a special part of the language grammar. So special that you can do this:

8ball = "black"; hint (currentNamespace getVariable "8ball"); // Hints "black"

(When normally, "8ball" would be the number of "8" token followed by a variable or operator "ball").

Edited July 21, 2015 by IanBanks

[Greenfist 1863]

What would those do ?

https://en.wikipedia.org/wiki/Augmented_assignment

[R3vo 2652]

https://en.wikipedia.org/wiki/Augmented_assignment

I see, thanks for the link.

[mrcurry 470]

Great read, this should be stickied.

[dreadedentity 278]

I wish SQF had the += -= and ++ and -- operators :(

This so much

EDIT: It's such a pain to write:

while {condition} do
{
//stuff
counter = counter + 1;
};

Edited July 21, 2015 by DreadedEntity