improved loading resources from absolute path

better error reporting when loading dictionary

src/utilities.cpp

@@ -911,6 +911,9 @@ std::unique_ptr<std::istream> resource_pool::load(fs::path name)
 	if (mLocalResources.count(name.string()))
 		result = open(mLocalResources[name.string()]);
 
+	if (fs::exists(p, ec) and not ec)
+		result = open(p);
+
 	for (auto di = mDirs.begin(); not result and di != mDirs.end(); ++di)
 	{
 		auto p2 = *di / p;

src/validate.cpp

@@ -24,10 +24,10 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "cif++/dictionary_parser.hpp"
 #include "cif++/validate.hpp"
-#include "cif++/utilities.hpp"
+#include "cif++/dictionary_parser.hpp"
 #include "cif++/gzio.hpp"
+#include "cif++/utilities.hpp"
 
 #include <cassert>
 #include <fstream>
@@ -401,6 +401,8 @@ void validator::report_error(const std::string &msg, bool fatal) const
 
 const validator &validator_factory::operator[](std::string_view dictionary_name)
 {
+	try
+	{
 		std::lock_guard lock(m_mutex);
 
 		for (auto &validator : m_validators)
@@ -426,8 +428,6 @@ const validator &validator_factory::operator[](std::string_view dictionary_name)
 		}
 
 		// not found, add it
-
-
 		auto data = load_resource(dictionary_name);
 
 		if (not data and dictionary.extension().string() != ".dic")
@@ -482,6 +482,13 @@ const validator &validator_factory::operator[](std::string_view dictionary_name)
 		}
 
 		return m_validators.back();
+	}
+	catch (const std::exception &ex)
+	{
+		std::string msg = "Error while loading dictionary ";
+		msg += dictionary_name;
+		std::throw_with_nested(std::runtime_error(msg));
+	}
 }
 
 void validator_factory::construct_validator(std::string_view name, std::istream &is)