Enforce Prototypes @ptnum

[LaidlawFX]

Hello,

So doing some clean up on my vex code in a wrangle and I turned on Enforce Prototypes to remove a bunch of the hacks to get the code setup. The one thing I can not find out a cleanup for is to replace @ptnum with a non @ function. 

Is the only way to declare it prior to the wrangle as another attribute? That just seems messy.  Even declaring before hands means you need @ptnum to source that attribute.

Thanks,

-Ben

Edited July 22, 2019 by LaidlawFX
@ptnum haunts

[Skybar]

Not sure if I understand you correctly but this works: https://github.com/jtomori/vex_tutorial#enforce-prototypes

So with Enforce Prototypes turned on, basically: 

int @ptnum;
vector @Cd;

@Cd = @ptnum;

 

[LaidlawFX]

Here is an example file of using @ptnum to source a point attribute that errors out when enforce Prototype is on.

int id = point(0,"id",@ptnum);

setpointattrib(0,"Cd", @ptnum,id);

Upstream of that I have an attribute create that does a basic.

i@id=@ptnum;

 

ptnum.hip

[Skybar]

11 hours ago, LaidlawFX said:

Here is an example file of using @ptnum to source a point attribute that errors out when enforce Prototype is on.

int id = point(0,"id",@ptnum);

setpointattrib(0,"Cd", @ptnum,id);

Upstream of that I have an attribute create that does a basic.

i@id=@ptnum;

 

ptnum.hip

Yeah in that case you need to declare @ptnum at the top. So:

int @ptnum;
int id = point(0,"id",@ptnum);

setpointattrib(0,"Cd", @ptnum,id);

Think of it as a key. If you write @ptnum further down, it will take a look to see if it's allowed to accept that. If it isn't declared, or if you make a typo (@ptnmu) it will error because it isn't allowed.

I don't think you can get rid of @ altogether, but you can add it to a variable to get rid of it further down:

int @ptnum;
int pointnum = @ptnum;

 

[LaidlawFX]

Thanks for that. I just re-read what you said and that link you sent. Had to do a double check and it follows the pattern in cvex, too. It's been a long time since I looked at vex like this.

cvex
obj_geo1_pointvop1(int ptnum = 0;
        export int Cd = 0)
{
    // Code produced by: bind1
    Cd = ptnum;
}

Thanks again.

Found the declaring part in the docs again, too.

https://www.sidefx.com/docs/houdini/vex/snippets.html#declare

Edited July 24, 2019 by LaidlawFX
Found another link for declaring for future people.