Class eval_error

include/chaiscript/language/chaiscript_common.hpp:168–477

Errors generated during parsing or evaluation

    /// Errors generated during parsing or evaluation
    struct eval_error : std::runtime_error {
      std::string reason;
      File_Position start_position;
      std::string filename;
      std::string detail;
      std::vector<AST_Node_Trace> call_stack;

      eval_error(const std::string &t_why, const File_Position &t_where, const std::string &t_fname,
          const std::vector<Boxed_Value> &t_parameters, const std::vector<chaiscript::Const_Proxy_Function> &t_functions,
          bool t_dot_notation,
          const chaiscript::detail::Dispatch_Engine &t_ss) noexcept :
        std::runtime_error(format(t_why, t_where, t_fname, t_parameters, t_dot_notation, t_ss)),
        reason(t_why), start_position(t_where), filename(t_fname), detail(format_detail(t_functions, t_dot_notation, t_ss)) 
      {}

      eval_error(const std::string &t_why, 
           const std::vector<Boxed_Value> &t_parameters, const std::vector<chaiscript::Const_Proxy_Function> &t_functions,
           bool t_dot_notation,
           const chaiscript::detail::Dispatch_Engine &t_ss) noexcept :
        std::runtime_error(format(t_why, t_parameters, t_dot_notation, t_ss)),
        reason(t_why), detail(format_detail(t_functions, t_dot_notation, t_ss))
      {}


      eval_error(const std::string &t_why, const File_Position &t_where, const std::string &t_fname) noexcept :
        std::runtime_error(format(t_why, t_where, t_fname)),
        reason(t_why), start_position(t_where), filename(t_fname)
      {}

      explicit eval_error(const std::string &t_why) noexcept
        : std::runtime_error("Error: \"" + t_why + "\" "),
        reason(t_why) 
      {}

      eval_error(const eval_error &) = default;

      std::string pretty_print() const
      {
        std::ostringstream ss;

        ss << what();
        if (!call_stack.empty()) {
          ss << "during evaluation at (" << fname(call_stack[0]) << " " << startpos(call_stack[0]) << ")\n";
          ss << '\n' << detail << '\n';
          ss << "  " << fname(call_stack[0]) << " (" << startpos(call_stack[0]) << ") '" << pretty(call_stack[0]) << "'";
          for (size_t j = 1; j < call_stack.size(); ++j) {
            if (id(call_stack[j]) != chaiscript::AST_Node_Type::Block
                && id(call_stack[j]) != chaiscript::AST_Node_Type::File)
            {
              ss << '\n';
              ss << "  from " << fname(call_stack[j]) << " (" << startpos(call_stack[j]) << ") '" << pretty(call_stack[j]) << "'";
            }
          }
        }
        ss << '\n';
        return ss.str();
      }