pdb2cif, avoid duplicate key violation on REMARK 350

include/cif++/category.hpp

@@ -44,6 +44,15 @@ namespace cif
 {
 
 // --------------------------------------------------------------------
+// special exception
+class duplicate_key_error : public std::runtime_error
+{
+  public:
+	duplicate_key_error(const std::string &msg)
+		: std::runtime_error(msg) {}
+};
+
+// --------------------------------------------------------------------
 
 class category
 {

src/category.cpp

@@ -416,7 +416,7 @@ category_index::entry *category_index::insert(entry *h, row *v)
 				os << col << ": " << std::quoted(rh[col].text()) << "; ";
 		}
 
-		throw std::runtime_error("Duplicate Key violation, cat: " + m_category.name() + " values: " + os.str());
+		throw duplicate_key_error("Duplicate Key violation, cat: " + m_category.name() + " values: " + os.str());
 	}
 
 	if (is_red(h->m_right) and not is_red(h->m_left))

src/pdb/pdb2cif.cpp

@@ -3248,9 +3248,18 @@ void PDBFileParser::ParseRemark350()
 							values.clear();
 						}
 
+						std::string type = mat == std::vector<double>{ 1, 0, 0, 0, 1, 0, 0, 0, 1 } and vec == std::vector<double>{ 0, 0, 0 } ? "identity operation" : "crystal symmetry operation";
+
+						// if (type == "identity operation")
+						// {
+							
+						// }
+						// else
+						try
+						{
 							getCategory("pdbx_struct_oper_list")->emplace({
 								{ "id", operID },
-						{ "type", mat == std::vector<double>{ 1, 0, 0, 0, 1, 0, 0, 0, 1 } and vec == std::vector<double>{ 0, 0, 0 } ? "identity operation" : "crystal symmetry operation" },
+								{ "type", type },
 								// { "name", "" },
 								// { "symmetryOperation", "" },
 								{ "matrix[1][1]", format("%12.10f", mat[0]).str() },
@@ -3265,6 +3274,11 @@ void PDBFileParser::ParseRemark350()
 								{ "matrix[3][2]", format("%12.10f", mat[7]).str() },
 								{ "matrix[3][3]", format("%12.10f", mat[8]).str() },
 								{ "vector[3]", format("%12.10f", vec[2]).str() } });
+						}
+						catch (duplicate_key_error &ex)
+						{
+							// so what?
+						}
 
 						mat.clear();
 						vec.clear();