From: David Wells Date: Sat, 15 Oct 2016 13:19:16 +0000 (-0400) Subject: Include the top XML sections in an error message. X-Git-Tag: v8.5.0-rc1~565^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57e5e4bd3ce5f7133e164a3442896b671e5d6381;p=dealii.git Include the top XML sections in an error message. This commit improves ExcInvalidXMLParameterFile by printing out the names of the top level XML sections in an exception message. --- diff --git a/source/base/parameter_handler.cc b/source/base/parameter_handler.cc index a74c234ddb..509c15b4d1 100644 --- a/source/base/parameter_handler.cc +++ b/source/base/parameter_handler.cc @@ -1936,11 +1936,29 @@ void ParameterHandler::parse_input_from_xml (std::istream &in) const std::size_t n_top_level_elements = std::distance (single_node_tree.begin(), single_node_tree.end()); - AssertThrow (n_top_level_elements == 1, - ExcInvalidXMLParameterFile ("There are " - + Utilities::to_string(n_top_level_elements) - + " top-level elements, but there " - "should only be one.")); + if (n_top_level_elements != 1) + { + std::ostringstream top_level_message; + top_level_message << "The ParameterHandler input parser found " + << n_top_level_elements + << " top level elements while reading\n " + << " an XML format input file, but there should be" + << " exactly one top level element.\n" + << " The top level elements are:\n"; + + unsigned int entry_n = 0; + for (boost::property_tree::ptree::iterator it = single_node_tree.begin(); + it != single_node_tree.end(); ++it, ++entry_n) + { + top_level_message << " " + << it->first + << (entry_n != n_top_level_elements - 1 ? "\n" : ""); + } + + // repeat assertion condition to make the printed version easier to read + AssertThrow (n_top_level_elements == 1, + ExcInvalidXMLParameterFile (top_level_message.str())); + } // read the child elements recursively const boost::property_tree::ptree diff --git a/tests/parameter_handler/parameter_handler_read_xml_error_03.output b/tests/parameter_handler/parameter_handler_read_xml_error_03.output index 71bf9d0049..bc2128a0f5 100644 --- a/tests/parameter_handler/parameter_handler_read_xml_error_03.output +++ b/tests/parameter_handler/parameter_handler_read_xml_error_03.output @@ -1,3 +1,7 @@ -DEAL::ExcInvalidXMLParameterFile ("There are " + Utilities::to_string(n_top_level_elements) + " top-level elements, but there " "should only be one.") -There are 2 top-level elements, but there should only be one. +DEAL::ExcInvalidXMLParameterFile (top_level_message.str()) + The ParameterHandler input parser found 2 top level elements while reading + an XML format input file, but there should be exactly one top level element. + The top level elements are: + ParameterHandler + secondtopleveltag