added try catch blocks to json loading functions

json/json_functions_bno.h

@@ -6,6 +6,7 @@
 
 static bool loadjson(const jsonval& parent, const std::string& key, std::vector<TimeJD>& vec, const bool exist = true, bool* loaded = nullptr)
 {
+    try {
         jsonval::ConstMemberIterator itr;
         if (!extract_value(parent, key, exist, loaded, itr)) {
             return false;
@@ -14,7 +15,7 @@ static bool loadjson(const jsonval& parent, const std::string& key, std::vector<
         const jsonval& a = itr->value;
 
         if (!a.IsArray()) {
-        throw Exp() << "error: element is not an array";
+            throw Exp() << "element is not an array";
         }
 
         for (jsonval::ConstValueIterator it = a.Begin(); it != a.End(); ++it) {
@@ -22,15 +23,20 @@ static bool loadjson(const jsonval& parent, const std::string& key, std::vector<
                 vec.emplace_back(StrToDate(it->GetString()));
             }
             else {
-            throw Exp() << "error: unsupported type";
+                throw Exp() << "unsupported type";
             }
         }
+    }
+    catch (std::exception& e) {
+        throw Exp() << "failed to load key '" << key << "'" << " - " << trim(e.what()) << "\n";
+    }
 
     return true;
 }
 
 static void loadjson(const jsonval& parent, const std::string& key, TimeJD& value, bool exist = true, bool* loaded = nullptr)
 {
+    try {
         const jsonval::ConstMemberIterator itr = parent.FindMember(key.c_str());
 
         if (itr == parent.MemberEnd() && exist) {
@@ -54,16 +60,21 @@ static void loadjson(const jsonval& parent, const std::string& key, TimeJD& valu
             }
         }
         else {
-        throw (Exp() << "element '" << key << "'" << " has unexpected format '");
+            throw Exp() << "unexpected type";
+        }
+    }
+    catch (std::exception& e) {
+        throw Exp() << "failed to load key '" << key << "'" << " - " << trim(e.what()) << "\n";
     }
 }
 
 static void loadjson(const jsonval& parent, const std::string& key, TimeGD& value, bool exist = true)
 {
+    try {
         const jsonval::ConstMemberIterator itr = parent.FindMember(key.c_str());
 
         if (itr == parent.MemberEnd() && exist) {
-        throw Exp() << "error: element not found";
+            throw Exp() << "element not found";
         }
 
         const jsonval& a = itr->value;
@@ -72,7 +83,11 @@ static void loadjson(const jsonval& parent, const std::string& key, TimeGD& valu
             StrToDate(a.GetString(), value);
         }
         else {
-        throw (Exp() << "element '" << key << "'" << " has unexpected format '");
+            throw Exp() << "unexpected type";
+        }
+    }
+    catch (std::exception& e) {
+        throw Exp() << "failed to load key '" << key << "'" << " - " << trim(e.what()) << "\n";
     }
 }
 
@@ -93,6 +108,7 @@ static void PutValue(jsonalloc& alc, jsonval& ss, const std::string& conName, co
 
 static bool loadjson(const jsonval& parent, const std::string& key, svalue<TimeJD>& value, const bool exist = true)
 {
+    try {
         jsonval::ConstMemberIterator itr;
 
         bool* loaded = nullptr;
@@ -106,7 +122,11 @@ static bool loadjson(const jsonval& parent, const std::string& key, svalue<TimeJ
             value = StrToDate(a.GetString());
         }
         else {
-        throw (Exp() << "element '" << key << "'" << " has unexpected format '");
+            throw Exp() << "unexpected type";
+        }
+    }
+    catch (std::exception& e) {
+        throw Exp() << "failed to load key '" << key << "'" << " - " << trim(e.what()) << "\n";
     }
 
     return true;
@@ -114,6 +134,7 @@ static bool loadjson(const jsonval& parent, const std::string& key, svalue<TimeJ
 
 static bool loadjson(const std::map<std::string, std::string>& parent, const std::string& key, svalue<TimeJD>& value, const bool exist = true)
 {
+    try {
         std::map<std::string, std::string>::const_iterator itr;
 
         bool* loaded = nullptr;
@@ -122,12 +143,17 @@ static bool loadjson(const std::map<std::string, std::string>& parent, const std
         }
 
         value = StrToDate(itr->second);
+    }
+    catch (std::exception& e) {
+        throw Exp() << "failed to load key '" << key << "'" << " - " << trim(e.what()) << "\n";
+    }
 
     return true;
 }
 
 static bool loadjson(const std::map<std::string, std::string>& parent, const std::string& key, TimeJD& value, const bool exist = true, bool* loaded = nullptr)
 {
+    try {
         std::map<std::string, std::string>::const_iterator itr;
 
         if (!extract_value(parent, key, exist, loaded, itr)) {
@@ -144,6 +170,10 @@ static bool loadjson(const std::map<std::string, std::string>& parent, const std
         }
 
         value = StrToDate(str);
+    }
+    catch (std::exception& e) {
+        throw Exp() << "failed to load key '" << key << "'" << " - " << trim(e.what()) << "\n";
+    }
 
     return true;
 }