There is a long broken (back to v3.7 at least) sqr() function 
implementation sitting in our code.

The fix in my povr (near v3.8) code base was done all in the 
source/parser directory.

In the files reservedwords.h and reservedwords.cpp move SQR_TOKEN to be 
just above SQRT_TOKEN. The order matters in this case.

Plus, in parser_functions.cpp, add the lines:

      case SQR_TOKEN:
          result = pow(node->child->number,2.0);
          break;

adjacent to those for the SQRT_TOKEN code.

Once fixed, sqr() will work both in the parser and within functions at 
parse time or run time.

Aside: In regular releases I believe there was a f_sqr() function 
defined. In the povr fork this now a munction resulting in an F_sqr 
function being defined/compiled.

Bill P.

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