How to use {++ } feature in spin2cpp?

SRLM

How do I use the spin2cpp feature to pass through code to the C++ output? I tried

{++
// my comment
}

and

{++
// my comment
;
}

and

{++
//
// and here are the C versions of the methods
//
int32_t test95::Square(int32_t x)
{
  return x*x;
}
}

And I get

../spinsource/quadrature_encoder.spin:48: syntax error

The line reference is the line immediately following the {++ } annotated block.

What am I missing?

ersmith

I can't tell from what you've posted; it looks like it should work. It may be that your particular form of {++ has to go after a PUB or PRI declaration (I think I've only really tried testing C++ functions after Spin functions). See for example Test/test95.spin in the spin2cpp source code:

{ indicate to spin2cpp that it should not output Spin methods }
{++!nospin}

{ the Spin version of the methods }
PUB Square(x)
  return x*x

{++
//
// and here are the C versions of the methods
//
int32_t test95::Square(int32_t x)
{
  return x*x;
}

}