Function toBool

src/sys/expressionparser.cxx:189–195

Convert a real value to a Boolean Throw exception if `rval` isn't close to 0 or 1

/// Convert a real value to a Boolean
/// Throw exception if `rval` isn't close to 0 or 1
bool toBool(BoutReal rval) {
  int ival = ROUND(rval);
  if ((fabs(rval - static_cast<BoutReal>(ival)) > 1e-3) or (ival < 0) or (ival > 1)) {
    throw BoutException(_("Boolean operator argument {:e} is not a bool"), rval);
  }
  return ival == 1;
}

BoutReal FieldBinary::generate(const Context& ctx) {
  BoutReal lval = lhs->generate(ctx);