Function CheckGenExParameters

Source/cmGeneratorExpressionNode.cxx:754–786

using Arguments = Range<std::vector<std::string>>;

bool CheckGenExParameters(cm::GenEx::Evaluation* eval,
                          GeneratorExpressionContent const* cnt,
                          cm::string_view genex, cm::string_view option,
                          std::size_t count, int required = 1,
                          bool exactly = true)
{
  if (static_cast<int>(count) < required ||
      (exactly && static_cast<int>(count) > required)) {
    std::string nbParameters;
    switch (required) {
      case 1:
        nbParameters = "one parameter";
        break;
      case 2:
        nbParameters = "two parameters";
        break;
      case 3:
        nbParameters = "three parameters";
        break;
      case 4:
        nbParameters = "four parameters";
        break;
      default:
        nbParameters = cmStrCat(required, " parameters");
    }
    reportError(eval, cnt->GetOriginalExpression(),
                cmStrCat("$<", genex, ':', option, "> expression requires ",
                         (exactly ? "exactly" : "at least"), ' ', nbParameters,
                         '.'));
    return false;
  }
  return true;
};

template <typename IndexType>
bool GetNumericArgument(std::string const& arg, IndexType& value)