You can have more than one return statement in a function.

function int TestReturns()
{
int A, B, C;

A = 5;
B = 7;
C = 8;

return A, B;

}

//*********************

int result_A, result_B;

// default check value;
result_A = 9;

(result_A, result_B) = TestReturns();

printf("return result = %g\n", result_A);

BabaJ
Ok…forgot you can change the input arguments for the function.

So to get the same effect which the intent was to run the function only once and make use of two results.

Something like this works.

function int TestReturns(int outside_A, outside_B)
{
int A;

A = 5;

outside_A = 33;
outside_B = 44;

return A;

}

//*********************

int converted_A, converted_B, possible_error_code;
 
converted_A = 5;
converted_B = 6;

possible_error_code = TestReturns(converted_A, converted_B);

printf("Second argument set to %g\n", converted_B);

I don't think it's a good way to return multiple values. Changing input parameter is danger and hard to debug.

The way to explicitly do this in VEX is to add an “export” keyword ahead of the parameter:

As in RenderMan Shading Language, parameters to user functions are always passed by reference, so modifications in a user function affect the variable the function was called with. You can force a shader parameter to be read-only by prefixing it with the const keyword. To ensure that the user function writes to an output parameter, prefix it with the export keyword.

Hmm, then maybe you could define a struct with the data you need and have the function return that?

wavebit
I don't think it's a good way to return multiple values. Changing input parameter is danger and hard to debug.