string t_py_generator::render_const_value()

in thrift/compiler/generate/t_py_generator.cc [1094:1204]

• 109 lines of code
• 28 McCabe index (conditional complexity)

string t_py_generator::render_const_value(
    const t_type* type, const t_const_value* value) {
  type = type->get_true_type();
  std::ostringstream out;

  if (type->is_base_type()) {
    t_base_type::t_base tbase = ((t_base_type*)type)->get_base();
    switch (tbase) {
      case t_base_type::TYPE_STRING:
      case t_base_type::TYPE_BINARY:
        out << render_string(value->get_string());
        break;
      case t_base_type::TYPE_BOOL:
        out << (value->get_integer() > 0 ? "True" : "False");
        break;
      case t_base_type::TYPE_BYTE:
      case t_base_type::TYPE_I16:
      case t_base_type::TYPE_I32:
      case t_base_type::TYPE_I64:
        out << value->get_integer();
        break;
      case t_base_type::TYPE_DOUBLE:
      case t_base_type::TYPE_FLOAT:
        out << std::showpoint;
        if (value->get_type() == t_const_value::CV_INTEGER) {
          out << value->get_integer();
        } else {
          out << value->get_double();
        }
        break;
      default:
        throw std::runtime_error(
            "compiler error: no const of base type " +
            t_base_type::t_base_name(tbase));
    }
  } else if (type->is_enum()) {
    indent(out) << value->get_integer();
  } else if (type->is_struct() || type->is_xception()) {
    out << rename_reserved_keywords(type_name(type)) << "(**{" << endl;
    indent_up();
    const vector<t_field*>& fields = ((t_struct*)type)->get_members();
    vector<t_field*>::const_iterator f_iter;
    const vector<pair<t_const_value*, t_const_value*>>& val = value->get_map();
    vector<pair<t_const_value*, t_const_value*>>::const_iterator v_iter;
    for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
      const t_type* field_type = nullptr;
      for (f_iter = fields.begin(); f_iter != fields.end(); ++f_iter) {
        if ((*f_iter)->get_name() == v_iter->first->get_string()) {
          field_type = (*f_iter)->get_type();
        }
      }
      if (field_type == nullptr) {
        throw std::runtime_error(
            "type error: " + type->get_name() + " has no field " +
            v_iter->first->get_string());
      }
      out << indent();
      out << render_const_value(&t_base_type::t_string(), v_iter->first);
      out << " : ";
      out << render_const_value(field_type, v_iter->second);
      out << "," << endl;
    }
    indent_down();
    indent(out) << "})";
  } else if (type->is_map()) {
    const t_type* ktype = ((t_map*)type)->get_key_type();
    const t_type* vtype = ((t_map*)type)->get_val_type();
    out << "{" << endl;
    indent_up();
    const vector<pair<t_const_value*, t_const_value*>>& val = value->get_map();
    vector<pair<t_const_value*, t_const_value*>>::const_iterator v_iter;
    for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
      out << indent();
      out << render_const_value(ktype, v_iter->first);
      out << " : ";
      out << render_const_value(vtype, v_iter->second);
      out << "," << endl;
    }
    indent_down();
    indent(out) << "}";
  } else if (type->is_list() || type->is_set()) {
    const t_type* etype;
    if (type->is_list()) {
      etype = ((t_list*)type)->get_elem_type();
    } else {
      etype = ((t_set*)type)->get_elem_type();
    }
    if (type->is_set()) {
      out << "set(";
    }
    out << "[" << endl;
    indent_up();
    const vector<t_const_value*>& val = value->get_list();
    vector<t_const_value*>::const_iterator v_iter;
    for (v_iter = val.begin(); v_iter != val.end(); ++v_iter) {
      out << indent();
      out << render_const_value(etype, *v_iter);
      out << "," << endl;
    }
    indent_down();
    indent(out) << "]";
    if (type->is_set()) {
      out << ")";
    }
  } else {
    throw std::runtime_error(
        "CANNOT GENERATE CONSTANT FOR TYPE: " + type->get_name());
  }

  return out.str();
}